Hansen Quick Disconnect
Training Manual
Table of Contents
1
History ________________________________________________________1
2
Introduction ____________________________________________________1
2
Introduction ____________________________________________________2
3
Quick Couplings: What are they and what do they do? ________________2
3.1 TYPES OF QUICK COUPLINGS _________________________________________________ 2
3.2 QUICK COUPLING STYLES_____________________________________________________ 5
4
Basic Components of a Quick Coupling _____________________________5
4.1 THE LOCKING MECHANISM ____________________________________________________ 7
4.2 SEALS AND THEIR FUNCTION IN QUICK COUPLINGS _____________________________ 11
4.3 VALVING ___________________________________________________________________ 13
4.4 PERCHES __________________________________________________________________ 16
4.5 SPRINGS___________________________________________________________________ 16
5
Quick Couplings in a Fluid System ________________________________16
5.1 PRESSURE AND FLUID RETENTION ____________________________________________ 17
5.2 PRESSURE AND ITS EFFECT ON QUICK COUPLINGS _____________________________ 17
5.3 FLOW AND PRESSURE DROP IN QUICK COUPLINGS _____________________________ 18
6
Why Are Quick Couplings Used? _________________________________20
7
Where Are Quick Couplings Used? ________________________________20
8
Sizing and Selection ____________________________________________22
9
Sizing of Piping System Components______________________________23
10 Selection Of The Proper Quick Coupling ___________________________24
11 Fundamentals: Physical Laws and Their Effect On Quick Couplings ____39
12 Basic Laws and How They Relate to Quick Couplings ________________39
1
History
Hansen Couplings
The first Hansen coupling was developed and manufactured by Hansen Manufacturing Company,
founded in 1915 by Fred Hansen. Since then, the Hansen Coupling has become the industry
standard for all quick connect/disconnect couplings. Hansen Manufacturing Company became a
division of Tuthill Corporation in 1980.
Coupleurs GROMELLE
In 1950, Raymond founded his company specializing in the production of mechanical components
and screw cutting. It was at the end of the 1950’s that the first compressed air rapid-action couplings
were produced to meet the needs of auto repair workshops. In 1966, the firm “Décolletage Raymond
GROMELLE” became “Coupleurs GROMELLE S.A.” in order to provide a sound base for further
strong development. In 1993, Coupleurs GROMELLE S.A. took a new step and became part of the
industrial American group Tuthill Corporation.
ONE LINE OF BUSINESS
In 1999, Hansen Couplings and Coupleurs Gromelle S.A. came together to form one line of business,
the Tuthill Coupling Group. By offering the Hansen and GROMELLE brands under one company, our
customers are better served with a comprehensive range of products that are thoroughly researched,
carefully designed, precision manufactured and widely distributed through an increasingly strong
network of worldwide distributorships.
GROMELLE Facility
Hansen Facility
1
2
Introduction
A Quick-Disconnect Coupling is a mechanical device – a fast, easy sure way to repeatedly connect
and disconnect almost any fluid line.
They are found everywhere today. In distribution systems for air, water, steam, hydraulic fluids,
vacuum, oil, grease, paint, liquid food – in fact almost anything that flows through a hose or tube. If a
hose or tube in a system is going to be connected or disconnected more than once a week, a QuickDisconnect Coupling will save money and labor by speeding up the job. Although they are simple in
concept, Quick Disconnect Couplings are precisely engineered for specific fluid applications. The
more one understands about their design, construction and principles of operation, the more valuable
they become in solving fluid-line problems.
3
Quick Couplings: What are they and what do they do?
3.1
Types of Quick Couplings
There are three basic types of quick couplings; single shut-off, double shut-off, and straight-through.
3.1.1
Single shut-off couplings - sometimes referred to as One-Way shut-off or Pneumatic couplings
As the term implies, single shut-off couplings have a check valve in one half, usually the socket half
and no valve in the mating half referred to as plug (Figure 1). This design is normally used in
systems where spillage of fluid on the down-stream side is unimportant. Single shut-off couplings
are normally installed with the valved half on the pressure side of the circuit to provide automatic
shut-off flow when the coupling is disconnected.
This type of coupling is commonly associated with compressed air systems. However, the coupling
is used on many other applications including lubrication, paint spray, and carpet cleaning
equipment.
Single shut-offs normally have low working pressure capabilities ranging from 100 to 300 PSI.
The are commonly made from brass or steel.
Figure 1
2
Interchanges -There are more than seven different mechanical designs for One-Way air type
couplers.
1. Industrial Interchange Types (65% of market volume). This type of air coupler was the
basis for the original patent on quick disconnect type couplers by Fred Hansen, founder of
the Hansen Coupling Company, in 1915. The patent was based upon the position of the
locking balls and their grip on the plug half of the coupling. At present, all companies
domestically and most European and Asian Quick Coupler Manufacturers catalog this design.
Hansen’s products are the 1000 and 3000 series.
2. Truflate Type (10% of market volume). This type of air coupling, characterized by its very
short plug nose, was developed by the Doerge brothers in Oakland, California during the
1920’s for the purpose of superseding the Hansen patent which was still in effect. They
started the Truflate Coupling Co. and achieved wide acceptance on the West Coast and east
to Denver. Also, since their specialty market was the automotive aftermarket, this coupling
design received great acceptance in the automotive parts stores, muffler shops and tire
garages. Today the Truflate coupling is a part of the Parker Quick Coupling Division. Truflate
having been bought by Parker in 1965 as their first, and at that time, their only Quick
Coupling product line. Its best 1993 markets are still the automotive MRO market and the
Staple and Nailing Industry. All major manufacturers have now cataloged this design.
Hansen uses the Auto-flo 23
3. Aro Type (9% of market volume). This type of air coupling works essentially the same way
as other One-Way couplers. It is characterized by a comparatively long plug nose and does
not interchange with the two previous types. It was developed by the ARO Coupling
Company of Byron, Ohio, and purchased by Tuthill Coupling Group in 1998. The European
interchange for the ARO coupler is made by Orion of France. Most major coupler
manufacturers have picked up this design.
4. Schrader Type (4% of market volume). This coupling was developed during the late ‘30’s as
an automatic push to connect not susceptible to accidental disconnect due to snagging the
sleeve while pulling the hose line across rough surfaces. To disconnect, the sleeve has to be
twisted instead of sliding back and forth. This coupling received acceptance in many
industries where this twist feature was saleable, i.e. military-industrial and dental-medical
industries. This company was located in Waterbury, Connecticut before being bought by
Parker, and thus the coupling received its widest acceptance in New England. Hansen has
no interchange
5. Lincoln Type (4% of market volume). The Lincoln “long nose” was developed during the
1930’s to supersede the Hansen patent (expired during 1938). It was sold through Lincoln
Lubricator Distribution and many industrial supply stores. It also received acceptance in the
automotive industry because of Lincoln’s distribution in that industry. Hansen has no
interchange.
6. European Designs (3% of market volume). Various European manufacturers have
established in the U.S. with proprietary designs; most importantly Cejn-Sweden, and ObacGermany. These European manufacturers have not had any great success with their
proprietary type designs and have had to copy one of the above U.S. types to get market
share. Hansen uses the Auto-flo 24.
7. Japanese Designs (2-3% of market volume). Metric based plug dimensions essentially sold
by Nitto, mainly through distribution active with Japanese care and associated supplier plants
utilizing Japanese production equipment. Hansen has no interchange for these types.
3
Double Shut-off Couplings – sometimes referred to as Two-way shut-off or Hydraulic Couplings
Double shut-off couplings have a check valve in both the socket and plug (Figure 2). They are used
in systems where down stream spillage is undesirable. Double shut-off couplings are commonly
associated with use in hydraulic systems. However, many different applications exist for this type of
coupling. They are found on systems handling steam, solvents, cooling water, oil, and a host of
other media.
Double shut-off couplings are normally capable of much higher pressures then single shut-off
couplings. Working pressures of up to 10,000 PSI are common. Some special hydraulic coupling
designs can reach 20,000 PSI, all depending upon design and material.
Double shut-off designs are quite versatile, allowing them to be converted to single shut-off designs
or straight-through designs.
Double shut-offs are also available in a wide range of materials. The most common being steel,
brass and stainless steel.
Figure 2
3.1.2
Straight-Through Couplings
Straight-through couplings are quick couplings that do not have any internal valves in either the
socket or plug (Figure 3).
They are normally used in conjunction with some form of manual valving to shut off fluid flow before
disconnect.
Straight-through couplings offer minimum pressure drop due to the absence of internal flow
obstructions.
Straight-through couplings normally have operating pressures in the moderate range of 1000-5000
PSI depending on the type of material.
Common materials are brass and stainless steel since these fittings are often associated with
corrosive fluids found in fluid transfer applications.
Figure 3
4
3.2
Quick Coupling Styles
There are two styles of quick couplings that are commonly found in Industrial applications.
1. Push Style: This design allows one hand
connection of a plug in a coupling (Figure 4). It
utilizes an "automatic" connection feature
whereby a spring-loaded sleeve is either
displaced or released from a cocked position.
This allows the sleeve to come forward to secure
the locking mechanism in its “locked” position.
Figure 4
Advantages and Disadvantages of the Push Style
This style is generally more expensive to make then the
sleeve style. One hand connection is possible if the
coupling is rigidly mounted. It requires a larger envelope
to accommodate the "automatic" spring mechanism.
2. Sleeve Style: This design requires manual
retraction of a spring-loaded sleeve before the plug
can be completely inserted into the coupling (Figure
5). Once the plug is fully inserted the sleeve is
released and the spring drives the sleeve forward,
locking into position.
Advantages and Disadvantages of the Sleeve Style
This style offers the greatest economy and has a
relatively safe operation since steps can be easily taken
to prevent accidental disconnect (sleeve guard). It
requires two hands to connect. It has a smaller envelope
size then a comparable push style.
Figure 5
4
Basic Components of a Quick Coupling
A quick coupling consists of a male half known as a plug, nipple or tip, and a female half known as a
socket, coupler or body.
The Plug
1. A plug may be one or two-piece construction.
A) One Piece: A single screw machine part, valved or unvalved, machined to accept the mating
locking mechanism of the female or coupler half (Figure 6).
5
Figure 6
B) Two Piece: Same as one piece except that the screw machine parts are used to make up
the complete part (Figure 7). This may be desirable to provide flexibility in providing a variety
of end terminations. It may also be used as the retainer for a valve assembly.
Figure 7
2. In all cases, the socket is constructed to provide a leak tight interface with the coupling. This
requires:
A) A sealing surface to mate with a seal carried in the body.
B) A receptacle for the locking mechanism carried in the body.
C) An end termination to connect the plug to a hose, tube or port.
The Socket
A socket may also be a one or two-piece construction.
1. One piece: A single part machined to accept the configuration of the mating plug and to provide
a leak tight seal (Figure 8).
Figure 8
6
2. Two Piece: Same as one piece except two parts are used. The second part may be used to
retain the valve assembly, and/or to provide flexibility in providing a variety of end configurations
(Figure 9).
Figure 9
4.1
The Locking Mechanism
Locking mechanisms are various devices and methods of holding the two mating halves together.
They can be any of the following:
Ball lock (Parker, Foster, Dynaquip, Aeroquip, Hansen)
Screw lock (Parker, Aeroquip, Hansen)
Pin lock (Lincoln, Hansen, Wiggins)
Pawl lock (Parker, Hansen, Foster)
Wire ring lock (Hansen)
Dog lock (Wiggins, Aeroquip)
Arms, levers or cams (OPW, Evertite, Andrews, Aeroquip, Arc Latch).
Breech lugs (Wiggins)
Latches (Wiggins, Imperial, Hansen)
Bayonet
The primary objective of any locking mechanism is to provide a positive method of retaining the plug
in the socket while minimizing the effect of pressure on the mechanism.
Brinelling: As discussed before, shock is very damaging to quick couplings since it can result in
brinelling. Brinelling is caused when a load is applied to a ball bearing that exceeds the elastic limits
of the steel and the raceways are permanently deformed. Brinelling creates measurable dents at
each ball location.
To maximize a quick couplings resistance to shock, two things can be done.
1. Harden the contact surfaces to resist deformation.
2. Maximize the amount of surface area contact, thereby distributing the shock load over a
greater amount of metal. Therefore, the greater the number of locking balls, the longer the line
contacts, use of threaded connections, etc. all improve resistance to shock and brinelling.
Other factors that influence the coupling's locking mechanism function are:
Side Load: A constant load exerted on the locking mechanism due to a heavy weight exerting force
at a right angle to the center line of the socket/plug combination. Side loading can create differential
7
wear on Side Loading the components of the mechanism as well as sealing problems, which will be
discussed later.
Impact Damage: Distortion of the sleeve, cams, or other parts due to severe impact. This situation
can make the locking devices inoperable.
Most Common Locking Mechanisms
Ball Locking
Ball locking is the most common method of locking coupling halves together. This method is a
relatively uncomplicated, easily manufactured, reliable way to maintain a connection (Figure 10).
Figure 10
Component Parts: Ball locks consist of a group of balls that float in a series of raidially drilled holes
(ball cage) in the socket (ball body). The holes are drilled with, either a slight taper, or a cone seat
so that the balls will not fall through into the bore of the coupling. A spring-loaded sleeve covers
the ball holes preventing the balls from falling out of their cage. Recesses machined on the inside
diameter allows the balls to float when the sleeve is retracted and the plug is inserted in the
socket. The sleeve then is allowed to come forward, forcing the balls down into the plug groove
and completing the connection.
Ball locking offers some definite advantages over other methods of locking.
a.
b.
c.
d.
Simple to manufacture - less costly.
Reliable
Good swivelling characteristics.
Good load distribution capability. (The more balls there are, the more points of
contact to distribute the load).
e. Good alignment qualities.
Generally, locking balls are made from carbon steel, chromium steel or stainless steel. They must
be harder then the material of the plug to resist brinelling.
Pin Locking
Pin locking is commonly associated with "Push to Connect" style couplings. These couplings are
typically used in pneumatic applications. Hardened pins are used to make contact at a tangent point
in the locking groove on the plug. The pins ride in an angled slot in the socket body, which allows
them to be driven forward by a spring, forcing them into the locking groove (Figure 11).
8
Figure 11
Pin locking provides minimal capabilities to distribute loading, due to the large amount of space
required to accommodate the pins. In a 1/4” body size for example, only two pins can be used which
provide only two points of contact.
Poor alignment quality and resistance to side load.
Pawl Locking
Pawls are cylindrical steel or stainless steel parts that are arranged in a radial pattern relative to the
centerline of the coupling. The pawls are held by the sleeve, and slide in an angled hole. As a plug
is inserted into the socket, the pawls cam over the plug and snap into the locking groove. Pawl
locking is always associated with push style couplings (Figure 12).
Figure 12
Pawls provide a relatively large contact area since they form a line contact along their axis, with the
ridge of the locking groove.
Some problem may be encountered with scoring of the plug’s surfaces, since the hardened pawls
may gouge the relatively soft plug as they cam over its surface.
This is a very expensive locking device, relative to pins or balls. Good alignment and side load
resistance.
Threaded Sleeve
Threaded sleeve locking is accomplished by the use of a sleeve, machined with a female straight
thread. The plug has a mating male straight thread. As the two halves are screwed together, the
plug engages a body seal in the socket and any valving present opens to flow (Figure 13).
Because the threads provide a large area of contact, this type of lock is very good for extremely
high pressures. There is very little possibility of brinelling. Threaded sleeves sacrifice convenience
since it requires more manual effort to connect the coupling.
9
Some potential exists for connection under pressure if the sleeve is designed to accept a wrench.
Use of tools allows sufficient torque to open valving under pressure.
Figure 13
Cam Lock
Cam locking is accomplished by using two or more levers in a coupling that engages a matching
groove on the plug. When the levers and grooves are aligned, the levers are compressed. They are
designed to force the plug into a butt seal as the levers approach the locked position. This is
accomplished by a camming action due to the eccentric shape of the levers (Figure 14).
Figure 14
Cam lock couplings are normally associated with low-pressure bulk transfer applications.
Some danger exists for accidental disconnect since the levers are vulnerable.
Wire Ring Lock
This method uses a wire ring that fits into a matching groove machined on the plug. A characteristic
Figure 15
feature of this locking device is that an axial or twisting motion of the sleeve is required to
disconnect. The wire is wedged between tapered grooves in the plug and the socket (Figure 15).
This style of coupling lock allows large bore diameter per nominal pipe sizes, since so little material
is needed for machining the locking groove. Thus, high flow rates can be achieved.
10
This locking device allows you to achieve nearly 360° contact of the wire around the plug, thereby
maximizing contact area and reducing brinelling.
4.2
Seals and Their Function in Quick Couplings
A seal may be defined as any shaped material designed to bar passage of fluid, and thereby
preventing an unwanted loss of fluid.
Requirements for seals vary. When ordering seals, be sure to specify seal materials that are
compatible with the service intended for the Couplings. Allow for the kind of fluid to be conveyed and
its temperature. Chemically active fluids will destroy some seal materials. Also, certain seals can
withstand higher temperatures, where others seals cannot.
By far, the most common form of Seal is some type of substance or plastic having some of “O” Ring
composed of an elastomer (an elastic synthetic, rubber-like substance or plastic having some of the
physical properties of natural rubber) compatible with the fluid and temperatures of the application for
which the Coupling was designed.
The most common seal materials used in quick couplings are elastomers.
Seals may be used in dynamic or static conditions. Performance of materials differs with the sealing
condition.
There are a wide variety of seal types that vary in shape and function. However, the most commonly used
types in quick couplings are O-rings. Other types include D-ring, and U-packer seals to name a few.
O-rings, are generally made from elastomeric rubber.
Commonly used elastomers in quick couplings are nitrile (Buna-N), Neoprene, Ethelyne Propylene, Viton,
and Buytl.
Seals may also be categorized by how they interface with a sealing surface.
1.
Face Seal: This term describes a flat seal/sealing surface interface with area contact.
2.
Diametral Seal: This term describes a seal/sealing surface interface that maintains a line contact on
a diameter.
The former is normally associated with washer seals and gaskets while the latter describes most O-ring and
metal seals.
Important Characteristics of Elastomers In Quick Couplings.
1. Resistance To Fluids: The compound of the elastomer must not be affected chemically by the
fluid it is to contain.
2.
Hardness: The durometer or hardness rating of a seal indicates its relative compressibility. This
characteristic is important because it governs how easily the material is deformed under pressure.
Higher numerical ratings indicate greater degrees of hardness and greater resistance to
deformation under pressure.
3.
Tear Resistance: Resistance to nicking and cutting of the seal by sharp edges that may pass over it.
11
4. Abrasion Resistance: Resistance to scrapping and rubbing over a surface. Especially important in
dynamic seals.
5.
Compression Set: The tendency of a seal to remain in a deformed shape after subjection to
pressure. Memory of a seal is its capability to rebound to its original shape and is measured against
elapsed time.
6.
Temperature: The physical effects of high and low temperatures may cause seal failure. High
temperature may result in liquification of the elastomer while low temperatures (cryogenic) may
cause crystallization and fracture of the seal.
Seals in Quick Couplings
Seals in quick couplings perform two basic functions:
1. Effect a seal between two mating halves (socket and plug).
2. Effect a seal between an internal valve and its seat.
Secondary functions may be to seal between component parts of the socket or plug, especially
where straight threads are used in the coupling's construction or installation.
Body Seal
A body seal may be defined as a seal that prevents loss of medium at the interface of the two
mating halves of a quick coupling in the connected position.
The body seal is normally installed in the socket, or body half, although some designs place it on
the plug. Seals are designed to seal on both OD (outside diameter) and ID (inside diameter).
The former method of installation provides much greater protection for the seal when compared
to the exposed position normally found on a plug installation.
The most common seal type used as a body seal is the O-ring. The seal is held in a groove or
"gland" machined into the male or female body. It may be supported with an anti-extrusion back
up ring to prevent pressure from forcing the elastomer into the gap between the socket and plug.
O-ring extrusion of this nature can damage the seal.
Other types of seals:
Lip Seal: A vee shaped seal that uses pressure to force the edge of its legs onto the sealing
Coupler surface.
Quad Ring: Similar to an O-ring except that the cross section forms a four lobed seal. It is
designed to provide almost twice the sealing surface.
Square Cut Seal: Gaskets that seal on the diameter of a plug but depend on area contact rather
than line contact with the sealing surface.
Valve Seals:
A valve seal may be defined as a seal that prevents loss of medium and pressure from either half of a
quick coupling in a disconnected position. Valve seals are installed in conjunction with a check valve
assembly located inside the coupling. The valve seal mates with a body seat to form a completed
seal.
Several methods of accomplishing a seal with a valve are:
1. Valve with O-ring: A groove is machined into the valve to accept an O-ring.
12
2. Valve with bonded seal: Elastomer is permanently bonded to the surface of the
valve.
3. Encapsilated seal: Specially designed seal, captured between two halves of a metal
valve. Metal halves are fastened together under pressure, capturing the seal in a
"sandwich".
4. Metal to metal: Valve, usually a hardened ball, seats against a coined surface. Metal
to metal seals of this type are generally restricted to hydraulic applications.
5. Multi-function seals: A multi-function seal is one that accomplishes a leak free,
pressure seal between socket and plug and also serves as the seat for a valve.
This type of seal is usually a washer that is captured mechanically in the socket.
Normally this requires a socket body consisting of two parts, a valve body, which
houses the valve mechanism and a ball body, which incorporates the locking device.
The washer seal is “sandwiched" between the two halves.
6. Function: A multi-function seal is normally found in single shut-off designs.
A metal spring-loaded valve, without an integral seal that seats on the washer seal
when disconnected. Spring and/or internal pressure forces the valve against the
washer completing the seal.
When a plug is inserted, it engages the nose of the valve, lifting it from its seat and
opening the valve to flow.
Simultaneously the pilot of the plug contacts the washer, completing the seal
between socket body and plug. Thus, the same seal accomplishes both functions.
NOTE: All of the factors described that affect seal performances apply to the proper
application of quick couplings in a fluid system. You must consider media compatibility and
temperature capability of the seal before selection.
4.3
Valving
Valves that are used in quick couplings are designed to provide a means to shut off fluid upon
disconnection of the coupling assembly. They may accomplish shut-off either manually or
automatically.
Manual shut-off is usually accomplished with a rotating lever that cams a valve open or shut, or
manual movement of a sleeve valve.
Automatic shut-off is usually accomplished with a spring loaded valve which is driven into its seat
by the spring when disconnected.
Valve Types and Their Operation
There are basically six valve types used in quick couplings. Some have variations that allow them to
perform specific functions. The most important of these variations will be discussed under the parent
type.
13
1. Blade Valves
Blade valves are normally found in single shut-off couplings and are used in conjunction with a dualpurpose washer seal. The term "blade" describes the configuration of the valve. It is machined to
mate with the nose of a plug. Two or more prongs seat inside the nose of the plug.
Fluid passage is achieved around these prongs. Sealing is accomplished when
disconnected by the flat, rear portion seating on the washer. Blade valves project
into the flow path of the plug, restricting the orifice and creating greater pressure
drop.
They fail to support the washer seal during operation and the point contact between prong and seal
can create undue wear on the seal at those points.
Blade valves achieve good alignment between plug and valve that reduces pressure drop.
2.
Tubular Valves
Tubular valves function like blade valves except that they are of tubular shape with either holes or.
Slots cut into the tube. Air flows through the valve instead of around it. Tubular
valves provide 360° support for: the seal. They seat on the plug nose without
projections inside the orifice to restrict flow. 360° support also eliminates differential
wear of the seal found with blade type valves.
Poor alignment increases pressure drop.
3.
Poppet Valves
Poppet valves are valves designed to include integral seals. They are generally streamlined in shape
and are most commonly used in double shut-off couplings for liquid service.
A poppet valve is actuated during connection by an opposing poppet valve. The
nose of one poppet mates with the other. As the plug is pushed into the socket
body, the opposing poppets, which are spring loaded, push against one another
lifting the poppets from their seats until they bottom against the valve assembly
retainer.
Spillage: Because the poppet noses project out beyond the faces the socket and plug, when
disconnected, some fluid is trapped between these two poppets and is lost when disconnection is
complete.
Air Inclusion: For the reason described, this causes spillage. Air becomes trapped on connection of a
socket and plug. The air becomes entrapped in the system when connection is complete.
Flush Poppet Valves:
Flush poppets are designed to eliminate spillage and air inclusion. Each opposing poppet has a
flat face, which is flush with the face of the plug and socket. This flat face minimizes Flush Valve
entrapment of fluid or air. These valves are normally used in conjunction with a sleeve valve in
non-spill couplings.
14
4.
Ball Valves
Ball check valves utilize a hardened spring-loaded ball mating with a coined metal seat to affect a
seal. Ball valves are simple and relatively inexpensive. They are generally used in hydraulic
couplings but are also found in some instrumentation couplings. These normally seal on an
elasomeric seat
Rotating Ball Valves: These valves are made from machined balls with a drilled hole through the
diameter to provide flow. Shut off is achieved by rotating the ball by means of a lever or cam. The
ball is caged in sealing material to prevent leakage around its circumference. This type is found in
agricultural, bulk transfer and, to a very limited extent, in single shut-off couplings.
5.
Sleeve Valves
A sleeve valve is a hollow cylinder that moves axially over another hollow cylinder. The sleeve is
machined to accept O-rings. The O-rings seal against the internal cylinder, which contains two
radically drilled sets of ports that are separated by a solid bulkhead which allows flow of fluid into
the sleeve valve. The O-rings in the sleeve are positioned relative to the drilled ports to open or
close the two sets of ports to flow. This valve is commonly used on safety exhaust couplings.
A second form of sleeve valve is one that is used in conjunction with non-spill quick couplings. This
sleeve valve works in conjunction with a stationary poppet. An O-ring on the poppet seals on the
I.D. of the sleeve valve. The plug nose engages the front edge of the sleeve valve displacing it off
the O-ring. At the same time, the stationary poppet displaces a movable poppet in the plug. Once
connected, fluid is free to flow through both halves.
6. Valve Retainers and Perches
Valve retainers and perches are devices that are used to hold a valve in position when in a quick
coupling. They perform the following functions:
Hold valve/spring assembly in position in the coupling.
Provide alignment control during the opening and closing operation of the valve.
Act as a positive stop for valves to insure complete valve opening and eliminate the
possibility of valve chatter, shift, and flow checking.
Methods Of Valve Retention
There are two basic methods of retaining a valve/retainer assembly in a quick coupling.
1. Two Piece Coupling: Couplings constructed of two halves (ball body and valve body or ball body
with end adapter) may be designed to use the rear-threaded portion as the valve retainer.
Spring and Adapter: In this design, the valve spring rests directly on the rear portion of the
coupling - which is threaded into the main socket or plug body. Valve alignment may be
controlled by vanes on the valve that guide on the interior surfaces of the coupling.
Perch and Adapter: This design uses the rear-threaded portion of the socket body to capture
and retain a perch. The perch performs the alignment and stop function.
2. One Piece Couplings: Couplings constructed with one machined part incorporating the ball body
and valve body function. Two basic methods of valve retention are used in this type.
15
Threads: Perch is designed to be threaded into the rear of the coupling to a given depth.
Retaining Ring: A retaining ring, which snaps into a groove machined in the coupling I.D.,
provides a lip on which the perch rests. This allows easy valve assembly removal and
installation without sacrifice of performance. It reduces the problem of chip contamination
inside the coupling. In threaded designs, because interference fit threads are used; chips are
shaved off during perch installation.
Stake and Groove: This method uses the spring capability of a stamped metal part. The
perch, constructed of spring steel or stainless steel is forced into the I.D. of the coupling. The
legs of the perch are so formed as to snap into a groove cut into the I.D. of the coupling. This
groove then becomes the retaining member. This style is difficult to remove and offers poor
field reparability.
4.4
Perches
A perch may be fabricated from any material. The following materials are commonly used: powdered metal,
extrusions, stampings, and machined parts.
Perches have a variety of shapes but usually incorporate two or more legs that rest on a snap ring adapter
in a groove or thread.
Valve guidance may be accomplished by providing a hole in which a valve stem may ride or a post over
which a hollow valve may ride.
The cross section of a perch directly affects the flow restriction in a coupling. The cross section that is
established is a compromise between allowable restriction and yield strength of the part.
4.5
Springs
Springs are normally carbon steel or stainless steel. Selection of springs is related to the body material of
the coupling. Steel bodies may have steel or stainless steel springs while brass and stainless bodies will
have stainless steel springs.
5
Quick Couplings in a Fluid System
What is a Quick Coupling?
1. A quick coupling is a device that is used to connect or disconnect fluid lines without the use of
tools or special devices.
2. A Quick Coupling consists of a female half (Socket), and a male half (Plug) (Figure 16).
Figure 16
Quick couplings are designed to allow make and break of fluid line connections while acting as a
pressure retaining device during system operation.
16
Since it is an integral part of the fluid system, the quick coupling is subject to all the dynamic forces
and laws governing fluid systems.
5.1
Pressure and Fluid Retention
1. The primary function of a quick coupling in a fluid system is the retention of pressure and fluid in the
system.
2. Pascal's Law states that pressure acts equally in all directions and at right angles to the confining
surfaces. This property of fluid under pressure can work both for and against the designer of quick
couplings. Pressure capabilities of a quick coupling depend upon the ability of the sealing and
pressure retaining parts to oppose the lines of force described by Pascal.
3. The retention of fluids by a quick coupling depends on several factors.
A) Mechanical:
Surface finish of the sealing surface.
Surface integrity of the seal material.
Seal resistance to deformation.
B) Fluid:
Viscosity: The higher the viscosity, the larger the leak path required.
Chemical composition of the fluid as it relates to the seal compound and the material from
which the coupling is made.
C) Pressure resistance capabilities of the seal/metal envelope and the size of that envelope
(more surface area = greater, force at the same pressure).
5.2
Pressure and its effect on Quick Couplings
1. A quick coupling is constructed of interrelated parts that interact with one another. The mechanical
properties of the metals used differ. Thus, some metals are more resistant to the effects of
pressure than others. There are two conditions, which affect the capability of a quick coupling to
contain pressure; CONNECTED and DISCONNECTED (Figure 17).
Connected
Disconnected
Figure 17
A) Connected Position: In the connected position, pressure is always attempting to force the
mating halves of the coupling assembly apart. This exerts tremendous pressure against the
locking mechanism. Pressure also acts against the seal between the body and nipple, trying to
force the seal out of its position.
17
BASIC PRINCIPLE: The rubber seal should be considered as an incompressible, viscous fluid
having a very high surface tension. Now, whether by mechanical pressure from the surrounding
structure or whether by pressure transmitted through hydraulic fluid, this extremely viscous fluid is
forced to flow in the gland to produce zero clearance or a positive block of the less viscous fluid
being sealed. The rubber absorbs the stack-up of tolerances of the unit and its memory maintains
a sealed condition. Figure 8 illustrates the O-ring as installed before the application of pressure.
Note that the O-ring is mechanically squeezed out of round between the outer and inner members
to close the fluid passage. The seal material under mechanical pressure pushes into the surface
finish grooves of the gland. Illustrates the application of fluid pressure on the O-ring. Note that the
O-ring has been forced to flow up to but not into the escape passage and in so doing, has gained
greater area and force of sealing contact. shows the O-ring at its pressure limit and a small portion
of the seal material have entered the narrow gap between inner and outer members of the gland.
illustrates the result of further increasing pressure and the resulting extrusion failure. The surface
tension is no longer sufficient to resist flow and the seal material squeezes out of the open
passage.
B) Disconnected Position: In the disconnected position, pressure acts against the poppet valve,
forcing it into its seat. Pressure Forces Poppet into Seat It is possible to build up sufficient
pressure to extrude the valve out of the coupling.
2. Connection and Disconnection under pressure:
A) Connection: Connection under pressure is predicated on the magnitude of pressure trapped
in the two coupling halves, and the amount of surface area on the poppet which is enclosed
to the pressure. i.e., if the surface area of the valve is 1.0 square inch and system pressure is
1000 PSI, a resultant force of 1000 pounds is required to move the valve from its seat.
However, if the valve surface is .25 square inches it would require one-fourth the amount of
force to displace the valves.
B) Disconnect: Here again, pressure works against disconnect under pressure. Since internal
pressure is trying to force the coupler and nipple apart, mechanical force is exerted on the
locking mechanism. In the case of ball locking devices, the locking balls ride up the locking
groove on the plug and wedge themselves between it and the sleeve. This restricts the
sleeve movement required for disconnection.
3. A third pressure related phenomena which plays an important role in the operation of quick
couplings are shock and surge conditions.
A) Shock and surge are pressure increases beyond the normal working pressure of a system;
caused by the operation of directional valves, flow control devices, actuators within the
system. Surge is a build up of pressure over a relatively long period of time. Surge would be
illustrated by a shallow sine curve that builds to a rounded peak and then gradually subsides.
Shock is a violent form of surge. Its curve is very steep with a very steep subsidence and
sharp peak. Shock is very damaging to fluid system components. Severity of shock is
directly proportional to the frequency and magnitude of the pressure peaks. High frequency
peaks of low magnitude can be just as serious as low frequency peaks on high magnitude.
Quick couplings can be severely damaged by shock. Shock sets up a pulsation of extreme
forces, which try to force the coupling apart. Locking devices work against this force and
consequently can suffer damage if exposed to this phenomena. A common result of this
condition is socket brinelling where a relatively soft metal is displaced by a harder metal.
5.3
Flow and Pressure Drop in Quick Couplings
1. The main objective of any design is to maximize the amount of fluid a coupling can flow within a
given envelope, keeping velocity consistent with the normal system velocity. Thus, if a system is
plumbed with 1/2" pipe, a quick coupling used in the system should accommodate an equivalent
18
volume, and maintain nearly the same velocity as the pipe. Therefore, the flow/velocity
relationship is critical to the selection of the proper quick coupling size.
2. Pressure Drop: Pressure loss in a quick coupling is due to:
Increasing or decreasing flow velocity due to increasing or decreasing the flow path area.
Changing the flow path direction required to go around valve springs and retainers.
Spliting the flow path from one stream to 2, 3, or more - i.e., to flow past retainers and
springs.
PRESSURE DROPS IN PIPES
When fluid flows smoothly without vortices or other turbulence, the flow is called LAMINAR.
Typically when a fluid is flowing this way it flows in straight lines at a constant velovity. Water
flowing smoothly and slowly from your faucet can show laminar flow. If the water hits a smooth
surface, a circle of laminar flow results until the flow slows and becomes turbulent. Click the
button below to see this.
When fluid flows slowly and smoothly, the flow is called laminar. At fast velocities, the inertia of
the water overcomes fluid frictional forces and turbulent flow results. When a fluid is flowing this
way it flows in eddies and whorls (vortices). When a fluid flows turbulently, there is much more
drag than when the flow is laminar. Water flowing smoothly and slowly from your faucet can
show laminar and turbulent flow. If the water hits a smooth surface, a circle of laminar flow
results until the flow slows and becomes turbulent.
The important thing to remember about pressure drops, or losses, in pipes is that they occur
ONLY while fluid is MOVING through the pipe. When fluid becomes stationary, all pressure
drops disappear and the three gauges read the same pressure. This is true no matter how long
the pipe or how severe the restrictions.
Same circuit as before but with end cap removed from pipe allowing fluid flow. Severe pressure
losses now appear as shown by typical readings of the gauges. The longer the pipe, and the
more severe the restrictions, the greater the pressure losses.
With major restrictions removed, most of the pressure loss disappears. On a well-designed
system, the natural loss fluid flow through pipes and valving will be relatively small as shown by
the typical gauge readings. Factors which influence pressure drop in pipes are: the inside
diameter and length of the pipe, volume of flow, internal roughness of pipe, restrictions or bends
in the piping, and the type of fluid. These fluids may vary from the consistency of water to that of
syrup.
Another contributor to pressure drop in quick couplings is fluid turbulence. Turbulence is
created when the fluid passes across the valves, since the "Laminar" flow of the fluid is
distributed.
Friction also contributes to pressure drop in quick couplings. Valved quick couplings
expose a much greater surface area to the fluid, increasing the amount of friction loss.
Pressure drop is a measure of system efficiency since its cumulative effect is to reduce
the capability of the system to do work. Energy lost through pressure drop is given off as
heat, which can break down the hydraulic fluid and deteriorate heat sensitive components
such as seals and hose. Loss of pressure results in slower work cycles at the actuator
and reduced force levels.
19
Flow and Pressure Drop
Because valves are contained within the coupling envelope, they affect the flow and velocity of the
fluid flowing through the coupling. The consequence of flow restriction is turbulence and higher
velocities resulting in pressure drop (See Chapter 10).
Therefore, quick coupling valves are designed to minimize negative impacts on the fluid system.
This is accomplished in the following manner:
Minimizing flow restriction pressure drop by not changing the flow area within the
allowable envelope. e.g., Large flow through openings in or around valves.
They minimize pressure drop resulting from turbulence by providing contoured recesses
that conform to the shape of streamlined valves. Provisions for tight valve alignment
control also help to minimize turbulence.
Elimination of unnecessary projections into the flow path such as seal cold flow, valve
projections, etc.
The significance of the effect of pressure drop varies from fluid system to fluid system. Often, to
achieve other desirable features such as low cost or automatic connection under pressure,
increased pressure drop is the price that must be paid. However, it is safe to say that excessive
pressure drop is detrimental and should be avoided.
6
Why Are Quick Couplings Used?
Quick couplings are used for a variety of reasons.
Direct Labor: Couplings reduce the amount of direct labor employed in making a fluid line connection. This
can be measured in terms of man hours saved and alternative productive use of saved man hours.
Equipment Productivity: Equipment can be more rapidly connected to its fluid system thereby reducing
downtime and increasing output.
Reduced Component Requirements: Quick couplings with internal valves can eliminate costly manual
valves and in line shut-off valves in the system. This saves on initial installation costs and maintenance of
the additional components.
Conservation: Valved quick couplings eliminate costly loss of expensive fluids such as hydraulic fluid.
Safety: Quick couplings with automatic check off eliminate dangerous fluid spills contributing to cleaner and
safer working enironment. Some designs prevent dangerous hose whip upon disconnection of the mating
halves.
7
Where Are Quick Couplings Used?
Typical Applications by Industry
Manufacturing: Quick-Disconnect Couplings are used extensively to connect air, lubrication, and control
lines to machine tools and other production machinery.
Research and Development: Flexibility, reliability, precision and consistency are important to accurate
results at lowest possible cost in the R&D lab. Quick-Disconnect Couplings provide these in both fluid flow
and gas handling for either test lab or pre-production-line operation. Almost any of those tentative,
20
“experimental” hookups in laboratories are handled faster and more efficient with Quick-Disconnect
Couplings.
Testing: Quick-Disconnect Couplings provide speed and accuracy for random or continuous production
testing for air or liquid leakage control devices, performance and accuracy of product quality-without
disrupting production schedules or shutting down assembly lines.
Service and Repair: Provides flexibility of moving service equipment right to the job. Required compressed
air and liquid lines are quickly and easily set up for fast servicing and repair-and just as easily removed
when the job is finished.
Ground Transportation: Quick-Disconnect Couplings are used in a variety of ground transportation
systems. Truck-tractor airbrake lines are quick-connect to the trailer and railroad cars are hooked up swiftly
and efficiently.
Marine Transportation: At sea or at dockside, liquid and air lines are connected or disconnected quickly,
conveniently and safely. The self-sealing ability of Quick-Disconnect Couplings prevents dangerous leaks
or spillage.
Aircraft and Aerospace: The Quick-Disconnect Coupling principle is widely used for aerospace
applications where space limitations and safety factors dictate component use. Ever system - primary or
redundant – is placed in service or taken out of service quickly and conveniently with minimum loss of gas
or liquid.
The markets in which Quick Couplings are used are very fragmented and diverse. Because of this,
coupling usage is evident throughout almost every aspect of industrial activity. Overall, an estimated
90% of the plants engaged in some type of manufacturing activity utilize Quick Couplings. Through
the use of Standardized Industrial Coding (SIC), we can classify the different Quick Connective
Coupling Market Segments. Coupling usage in these segments could be further classified as for
Original Equipment Application (OEM) or for Maintenance, Repair and Operating (MRO usage).
SIC
35
37
34
28
33
30
26
36
29
39
27
38
Description
Machinery (except electrical)
Transportation Equipment
Fabricated Metal Products
Chemicals & Allied Products
Primary Metal Industries
Rubber & Plastic Products
Paper & Allied Products-Forestry
Electrical & Electronic Machinery
Petroleum Refining and Related Industries
Misc. Manufacturing Industries
Printing, Publishing & Allied Industries
Measuring, Analyzing & Controlling Instruments
Quick couplings are normally used in conjunction with at least one flexible fluid line (hose, tube, etc.), to join
or isolate portions of a fluid system.
Basic uses include:
1. Changing of actuators or tools.
2. Connections between modular components.
21
3. Manual shut-off valving.
4. Testing of components.
5. Interconnection of supply and return lines on remote systems.
6. Manifolding
Quick couplings provide a rapid method to change fluid lines quickly, often without the use of tools.
8
Sizing and Selection
8.1.1
Sizing
1. Body size designation and sizing increments.
A) Tubing and hose are sized in one sixteenth inch increments.
B) Quick couplings may be sized in one sixteenth or one eighth inch increments.
Snap-Tite, Swagelok, and Aeroquip size in sixteenths.
Hansen and all others, size quick couplings in one eighth inch increments. One eighth
increments are used to conform more closely to the capacity rating system based on pipe
sizes which are normally called out in eighths.
C) Example
B2H-16
2/8" or 1/4" Nominal Pipe
D) End termination sizes may vary from the nominal body size. Therefore, it is possible to have,
for instance, 3/8" pipe threads in a 1/4”, 3/8”, or 1/2" body size coupling or 3/8" O-ring boss
fittings on a 1/8”, 1/4”, or 3/8" body size.
2. Sizing of flow and pressure drop requirements of a system.
A) As we discussed in “Fundamentals: Physical Laws and Their Effect on Quick Couplings”,
restrictions of the flow path through a quick coupling result in pressure drop. Consequently,
selection of the proper body size quick coupling is based on the amount of pressure drop that
can be tolerated in that system.
B) Sizing objectives are:
Minimum pressure loss.
Minimum cost
C) Flow performance rating of quick couplings (See Catalog)
Performance can be expressed as a direct relationship between volume in CFM or GPM
at a given pressure and velocity through the use of Flow vs. Pressure Drop Tables.
Performance may also be expressed in terms of a Cv factor rating. The Cv factor is an
index rating of relative efficiency.
D) Selection of the proper coupling body size can be easily accomplished using the Flow versus
Pressure Drop charts provided by the manufacturer.
22
9
Sizing of Piping System Components
The inside diameter or "Flow Capacity” of any component should allow optimum flow/velocity of the
fluid in the system.
1. Capacity too small: Velocity will be too great causing excessive pressure loss resulting in
reduced power available.
2. Capacity too large: Unnecessary cost.
Select components that meet the working pressure and flow requirements of the system.
TABLE I-F. Equivalent Pipe and Tubing Sizes
Tubing O.D.
1/4"
5/16"
3/8"
1/2"
5/8"
3/4"
Pipe Size, NPT
1/8
1/4
3/8
1/2
3/4
1
7/8"
1"
TABLE 1-G. Pipe Size for Compressed Air Distribution System
Figures in the main body of the chart are suggested sizes of standard black pipe for use on long runs,
to keep the pressure loss to a reasonable minimum.
Air Flow, SCFM Comp. H.P 25'
50' 75' 100' 150' 200' 250' 300'
5 or less
1.4
1/2"
10
2.8
1/2"
15
4.3
1/2" 3/4"
20
5.6
3/4"
25
7
3/4"
30
8.5
3/4"
35
10
3/4"
40
11.2
3/4"
50
14
1"
70
20
1"
3/4"
1"
1"
1"
1"
1 1/4"
Table 1-H. Hydraulic Selection
Flow Volume
3 GPM 6 GPM 12 GPM 28 GPM 50 GPM 76 GPM 100 GPM 200 GPM
Pressure Lines (NPT)
1/4"
3/8"
1/2"
3/4"
1"
1 1/4"
1 1/2"
2"
Pump Suction (NPT)
3/4"
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
4"
NOTE: This table based on the I.D. of standard weight black pipe. If a heavier pipe, tubing, or hose is used,
select a size from one of the previous tables that has approximately the same inside diameter. For return
lines, use one size larger than shown for pressure lines. For pressures over 3000 PSI, one pipe size smaller
than shown for pressure line may be used.
23
10 Selection Of The Proper Quick Coupling
Series 1000/400/500 (Catalog Pg. 10)
Features of the Series 1000/400/500:
Type: Sleeve Coupling
Blade valve-employed in all Hansen Series 1000/400/500
Ball locking device-Three balls are used in the construction of the 1/4” 1000 Series. The balls are
stainless steel for maximum ware and corrosion resistance.
Sleeves are case hardened steel for maximum resistance to impact, damage, and brinelling as a
result of the action of the locking balls under pressure. Prominent groves provide excellent
gripping surfaces to disconnect.
The coupling consist of two parts:
1. Valve Body: This is the rear portion of the coupling, and serves as the valve assembly
retainer. It also captures and supports the washer seal.
2. Ball Body: This is the front part of the coupling. The ball body has radially drilled ball
holes to hold the locking balls. The ball body is machined to accept the shape of the
plug.
Some method must be used to hold the balls in the ball hole on the coupling body while providing
adequate space for the balls to move in their holes. Provisions must be made to accept a certain
degree of dirt and prevent the possibility of wedging action of the ball in its hole.
Seal
The 1000/400/500 Series uses a single washer type seal. The seal performs the following
functions:
Seals between socket and plug.
Seals between ball body and valve body.
Provides soft seat for the blade valve.
24
All washer seals used in Hansen couplings are precision molded to assure reliability.
Standard seal compound is Buna-N (Nitrile). Other compounds are available on special order.
Springs
Valve springs are all manufactured from 302 stainless steel.
Valve spring is designed with a tail hook to prevent collapse and spring
reversal under reverse flow conditions.
Plugs
1000/400/500 Series plugs are case hardened to provide maximum resistance to
brinelling.
The plug face of the 1000/400/500 Series butts the surface of the washer seal.
This feature creates a situation where the higher the pressure, the more effective
the seal, since pressure forces the washer onto the surface of the plug. In other
plug designs, a diametral seal is achieved with no gain in sealing capability under
pressure.
Sizes, End Terminations, and Materials
This series is available in three sizes 1/4” (1000 Series), 3/8” (400 Series), & 1/2”
(500 Series).
End types include male pipe, female pipe, standard hose barb, push lock hose
barb, and reusable hose end. End fittings are available in a variety of jump sizes
in each body size.
Standard materials are Brass, and Stainless Steel. Couplings are made with
Brass bodies and a Steel sleeve. This feature provides for corrosion properties
with a brass body, and better ware with a steel sleeve, as brass is a very soft
material. Brass sleeves and valve are available (consult catalog).
Series 3000/4000/5000/6000 (Catalog Pg.14)
This coupling was originated by Fred Hansen of Cleveland, OH and was adopted as a military
standard. Hansen Series 1000/400/500 is designed to mate with MIL-C- 4109 plug machining. Many
manufactures make interchanges conforming to this military specification.
Applications :
Industrial Interchange Pin Lock Couplings designed for compressed air, gases, and liquids.
Type: Sleeve Coupling
Blade valve-employed in all Hansen Series 3000/4000/5000/6000
25
Ball locking device-Six balls are used in the construction of the 1/4” 3000 Series. The balls are
stainless steel for maximum ware and corrosion resistance.
Optional sleeve lock prevents accidental disconnection.
Seal
The Series 3000/4000/5000/6000 uses a single washer type seal. Standard seal
compound is Buna-N (Nitrile). Optional seal materials available.
Valve springs are all manufactured from 302 stainless steel.
Series 3000/4000/5000/6000 plugs are zinc plated case-hardened Steel (all sizes).
Springs
Plugs
Sizes, End Terminations, and Materials
This series is available in four sizes 1/4” (3000 Series), 3/8” (4000 Series), 1/2” (5000
Series), 3/4” (6000 Series).
End types include male pipe, female pipe, standard hose barb, push lock hose barb, and
reusable hose end. End fittings are available in a variety of jump sizes in each body size.
Standard materials are Brass, and Stainless Steel. Couplings are made with Brass
bodies. Locking Pins are constructed of stainless steel.
Series P-30 & P-40 Industrial Interchange (Catalog Pg.19)
Industrial Interchange Plastic Couplings designed for compressed air. Easy, automatic, push-toconnect design provides instantaneous connection and disconnection of lines, plus automatic shut off
of socket end of line. Used in assembly lines to prevent dents and dent damage to painted surfaces.
Type: Sleeve Coupling
Blade valve-employed in all Hansen Series P-30 & P-40.
Seal
The Series P-30 & P-40 uses a single washer type seal. Standard seal compound is
Buna-N (Nitrile).
Valve springs are all manufactured from 302 stainless steel.
Series P-30 & P-40 plugs are acetal. Series P-30 accepts all Series 3000 plugs. Series
P-40 accepts all Series 4000 plugs.
Springs
Plugs
Sizes, End Terminations, and Materials
This series is available in two Hose I.D. sizes: 1/4” (P-30 Series), and 3/8” (P-40 Series).
26
End types include:
Socket: 1/4” and 3/8 Hose Stem End Connections
Plug Connection: Male and Female End Connections.Hose Stem End and reusable
end connection.
Standard materials are:
Socket - Acetal Body, Polypropylene Sleeve, and Zinc Plated Steel Valve.
Plug - Acetal
Locking Pins are constructed of stainless steel.
Series AUTO-FLO 23 & 24 (Catalog Pg. 20)
High flow, automatic quick-connect couplings designed for use with compressed air. Easy, automatic,
push-to-connect design provides instantaneous connection and disconnection of lines, plus automatic
shut-off of socket end of line.
Features:
Auto-Flo 23 is the first automatic universal coupling designed to operate with industrial, ARO 210 and
Tru-Flate Interchange plugs.
Auto-Flo 24 operates with CEJN 320 and Retus 25 interchange plugs.
Standard Materials:
Socket
Brass Body
Brass Valve
Zinc Plated Steel Sleeve
Buna-N (Nitrile) Seals
Stainless Steel Springs
Stainless Steel Locking Balls
Plug
Industrial Interchange
Zinc Plated Case-Hardened Steel
27
Series SVS Industrial Interchange (Catalog Pg. 22)
Zero Pressure-to-Connect/Disconnect Coupling designed for use with compressed air. Body sizes are
1/4”, 3/8”, 1/2”, and 3/4”. Air supply is shut off and downstream air is vented to atmosphere while
connecting and disconnecting.
Features:
The SVS Series 1/4” and 1/2” sockets accept MIL-C-4109 plugs.
Standard sleeve lock prevents accidental disconnection.
Standard Materials:
Socket
Zinc plated Steel Body and Sleeve
Buna-N (Nitrile) Seals
Steel Locking Balls
Plug
30SVS: Use Series 3000 Plugs
40SVS: Use Series 4000 Plugs
50SVS: Use Series 5000 Plugs
60SVS: Use Series 6000 Plugs
Series Safeline 1/4” Industrial Interchange (Catalog Pg. 23)
The SAFELINE Industrial Interchange pushbutton safety coupling is designed or use with
compressed air. Safe and easy to connect and disconnect. Two-step disconnect procedure shuts off
air supply and releases downstream air pressure before the plug can be removed from the socket.
Hose whip is prevented.
Features:
Light weight, compact ergonomic design. Accepts 1/4” MILC-4109 plugs.
Standard Materials:
Socket
Aluminum and steel construction
Buna-N (Nitrile) Seals
Plug
Use Series 3000 Plugs
28
Series 180 & 280 1/8” Nominal (Catalog Pg. 24)
Miniature Ball Lock Quick-Connect Couplings designed for use with compressed air, gases and
liquids.
Features:
Ball lock, manual operation. Series 180 and 280 sockets mate with all Series 180 plugs. Series 180
socket has a tire valve. Series 280 socket has a 1-HK valve, which provides higher flow capacity.
Viton seals available as an option.
Standard Materials:
Socket
Brass Body and Sleeve
Valve
180: Nickel Plated Brass Tire Valve
280: Brass Series 1-HK Valve
Buna-N (Nitrile) Seals
Stainless Steel Springs
Stainless Steel Locking Balls
Plug
Brass
Series 600 & 700 (Catalog Pg. 25)
Series 600 & 700 couplings are designed for use in oxyacetylene service. Series 600 is used with
oxygen. Series 700 is used with acetylene.
Features:
Ball lock, manual operation. Non-interchangeable designs prevent accidental crossing of the lines.
The sleeves are color coded to for easy identification. Sleeve lock on all UL prefix or SL suffix part
29
numbers to prevent accidental disconnection. Sockets with hose connections cannot be UL listed.
Series 600 and 700 couplings can also be used with compressed air and other gases.
Standard Materials:
Socket
Brass Body
Brass Valve
Painted Brass Sleeve
Buna-N (Nitrile) Seal
Stainless Steel Springs
Stainless Steel Locking Balls
Plug
Brass
Series 2RL & 3RL (Catalog Pg. 28)
Series 2RL & 3RL are ring-lock quick-connect couplings have a unique interchange which Hansen
designed for use with compressed air.
Features:
Series 2RL & 3RL features high flow capacity, ring lock, and push-to-connect. Coupling will not
disconnect when the hose is dragged on the group. Optional seal material is available.
Standard Materials:
Socket
Zinc Plated Steel Body
Brass Socket End
Nickel Plated Steel Sleeve
Buna-N (Nitrile) Seal
Stainless Steel Spring
Zinc Plated Steel Locking Pins
Plug
Zinc Plated Case-Hardened Steel
30
Series HK ISO 7241-1 Series B (Catalog Pg. 33)
Series HK Couplings are designed for general purpose hydraulic service. Some are suitable for use
with various liquids, chemicals, steam, gases and vacuum. Series HK couplings conform to the
dimensional requirements of ISO 7241-1 Series B. Body sizes range from 1/8” to 2-1/2”.
Features:
Brass, steel, and stainless steel construction available in all sizes; polypropylene available in 1/4”
body size. End connections are female NPTF, BSPP and SAE o-ring boss. Heavy duty steel
couplings for use in high impulse service available in most sizes.
Standard Materials:
Brass, zinc-plated steel,
stainless steel an
polypropylene (1/4” only
construction
Stainless steel springs, balls
and retaining rings
Buna-N (Nitrile) seals
Teflón back-up rings in 1-HK
through 8-HK steel and
stainless steel sockets
Series HA 15000 ISO 7241-1 Series A (Catalog Pg. 38)
The Series HA 15000 is a general purpose hydraulic and fluid transfer coupling that conforms to the
dimensional requirements of ISO7241-B. Body sizes are 1/4”, 3/8”, 1/2”, 3/4”, and 1”.
Features:
The Series HA features a ball lock, manual connect, disconnect, poppet valving and slim profile. It is
zinc plated steel construction and is available in NPTF and BSPP end connections.
31
Standard Materials:
Stainless steel springs, balls and
retaining rings
Buna-N (Nitrile) seals
Series QA 29000 Flat Face (Catalog Pg. 40)
The Series QA 29000 is a flat face dry break or minimum spill hydraulic coupling. Body sizes are 1/4”,
3/8”, 3/4”, and 1”.
Features:
The Series QA 29000 features a ball lock, push-to-connect with minimum fluid loss when
disconnecting and minimal air inclusion when connecting. NPTF and BSPP threads available. The
coupling has a standard sleeve lock. Size 3/8”, and 1/2” couplings meet HTMA dimensional
standards.
Standard Materials:
Zinc plated steel construction
Stainless steel springs and balls
Buna-N (Nitrile) seals
Series 96 (Catalog Pg. 42)
Hansen Series 96 is a heavy-duty wing nut coupling which is designed for use in hydraulic lines
where dry-break and minimum air inclusion are required. The Series 96 interchanges with other wing
nut manufacturers. Screw to connect coupling.
Primary applications are for hydraulic lines that require a dry-break such as hydraulic dump trucks, oil
field equipment, and spreading equipment.
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Standard Materials:
Brass Body (socket and Plug)
Zinc plated steel wing nut (socket)
Stainless steel springs
Buna-N (Nitrile) seals
Series UP10 “Ultra Pressure” (Catalog Pg. 38)
This is a high pressure hydraulic quick connect coupling designed to operate at pressures up to
10,000 PSI. The Ultra Pressure coupling features a ball lock connection, non-automatic. Unique
interchange coupling. Typically used in high-pressure hydraulic tools.
Standard Materials:
High strength steel bodies and valves
Stainless steel springs and balls
Buna-N (Nitrile) seals
Teflón back-up ring (socket)
Series WA 56000 (Catalog Pg. 44)
Hydraulic Ram Coupling, with screw together heavy duty design. Operating pressures up to 10,000
PSI. Suitable for use in hydraulic ram, pump and high impulse applications. Common industrial
interchange with other manufacturers.
Include fluid transfer and dynamic impulse, hydraulic pumps and test stands, and portable hydraulic
rams or jacks.
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Standard Materials:
Zinc plated steel construction
High strength steel ball valves
Stainless steel springs
Buna-N (Nitrile) seals
Teflón back-up ring (socket)
Series 2-HKIG & 2-HKIL (Catalog Pg. 45)
The Series 2-HKIG and 2-HKIL are 300 Series stainless steel two-way couplings that are designed
for instrumentation liquid and gas handling. The 2-HKIG and 2-HKIL do not interchange so crossconnection safety problems are eliminated. Ball lock, non-automatic coupling.
Instrumentation applications using gases and liquids such as laboratories and test benches in
industrial plants.
Standard Materials:
Stainless steel springs, balls and retaining rings
Buna-N (Nitrile) seals
Socket identification ring
2-HKIL: White acetal
2-HKIL: Black acetal
Seals: Teflon, Viton, EPDM
Series DB 316 STAINLESS STEEL FLAT FACE (Catalog Pg. 47)
Designed for fluid handling where minimum spillage and minimum air inclusion are required. This is a
non-automatic ball lock coupling.
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Suitable for use in chemical, pharmaceutical and food processing industries.
Standard Materials:
316L Stainless steel construction
Viton seals
Series ST Straight-Through (Catalog Pg. 53)
The Hansen ST Series is designed as a non-valved coupling for applications where maximum flow is
required. The Hansen ST Series is an “Industrial Interchange” with other manufacturers. The ST
plugs are hardened to be highly resistant to brinelling. Non-automatic ball-lock coupling.
The maximum flow offered by the ST Series is utilized in pressure wash equipment, steam cleaning,
fluid transfer, mold coolant lines, and chemical processing.
Standard Materials:
Brass or 303 stainless steel socket construction
Stainless steel springs, balls and retaining rings
Brass, zinc plated steel and 303 stainless steel plugs
High impulse heat treated 416 stainless steel plugs
Available in 1/4” and 3/8” body sizes
Buna-N (Nitrile) seals
Series PS-ST & P3-ST (Catalog Pg. 57)
Series P-2ST and P3-ST couplings are designed for use with medical equipment. They can also be
used in a variety of low pressure fluid transfer applications.
Features
Interchange with 2-ST and 3-ST
Excellent chemical resistance
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Light weight
Low Cost
Standard Materials
Polypropylene construction
Buna-N (Nitrile) seals
Series GH Garden Hose (Catalog Pg. 56)
Series GH couplings are designed for water service where hoses are connected and disconnected
frequently. They are available with garden hose threads and ¾” pipe threads. Sockets are available
without valves for maximum flow and with valves for convenience of operations.
Features
Durable Brass construction
Ball lock
Standard Materials
Brass plug and socket bodies
Nickel plated brass sleeve
Stainless steel balls and springs
High Quality Buna-N seals
Straight-through or one-way shut-off
Buna-N o-ring and washer
Plastic (acetal) valve
Series FLO-TEMP 200/300/500 (Catalog Pg. 57)
The Hansen Flo-Temp Series offers valved and non-valved couplings that provide maximum flow for
cooling in injection molds. Available in a wide variety of hose ends: 90°, 45°, and straight barbs with
standard barbs and push lock. Standard industrial interchange. Non-automatic ball lock coupling.
The Hansen Flo-Temp Series is designed for connecting cooling lines to molds and dies used in the
injection molding and die casting industry.
Standard Materials:
Brass socket construction
Stainless steel springs and locking balls
Viton seals (-30°F to + 450°F)
Brass and zinc-plated steel plugs
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Series Gas-Mate (Catalog Pg. 60)
The Gas Mate is a one-way shut-off coupling designed for attaching appliances to gas lines. The
coupling provides safety in the event of a fire; the plug has a heat-sensitive device that shuts off the
flow of gas. This series is certified by AGA/CGA to the requirements of ANSI Z21.41 and CAN1-6.9.
Non-automatic ball lock coupling.
The Gas Mate provides quick-connect convenience and safety for gas grills, ovens, small appliances
and caster-mounted restaurant equipment.
Standard Materials:
Brass construction
Stainless steel locking balls
Viton socket o-ring
Valve actuator soldered to plug with low melting
temperature alloy
Series FS FLOW SENSOR (Catalog Pg. 62)
Series FS Flow Sensors are designed to protect personnel and property in case of hose failure in
compliance with Federal Safety Regulations. Flow Sensors are intended for use with compressed air.
Features
Automatically shuts off air flow to ruptured hose
Reduces risk of injury or damage from hose whip
Automaticaly resets after failure correction
250 psig pressure rating (all sizes)
Low pressure drop
Operates in any orientation
Compact design, economical, tamper-resistant
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Standard Materials:
Brass body
Acetal valve (1/4” – 1”)
Brass valve (1 ½”)
Stainless steel valve spring
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