Bandlock™ 2
Q u i c k o p e n i n g c lo s u r e
GD Engineering is a market leader in
the design and manufacture of pipeline
pigging solutions to the oil, gas and
process industries worldwide. We
manufacture a range of innovative and
proven products including the industry
leading Bandlock™ 2 Closure, Hi-T
Pigalert™ scraper passage indicator and
Bandlock™ 2
Quick-Opening Closure
I n n ovat i v e D e s i g n F e at u r e s
The GD Bandlock™ 2 is the original and benchmark design for
global high-pressure applications with over 20,000 units in operation
worldwide. GD Bandlock™ 2 Closures provide horizontal or vertical
access to any pressure vessel in seconds. Compared with other quick-
associated equipment.
opening closures they can be operated safely at remarkable speed —
We provide advanced solutions where
any size of unit can be opened or closed in less than a minute, with no
design innovation, performance and
special tools required.
reliability need to go hand in hand
in the most cost-effective way. Our
strategy is to create market advantage
through technology, service and product
leadership, by expanding our market
focus to offer full customer solutions.
Computer-aided technology has played a large part in the design of
Bandlock™ 2. The main pressure-loaded sections have been designed
to save weight by employing finite element analytical techniques and
proof testing by strain gauges, while still adhering to primary pressure
vessel code requirements.
The tried and tested locking band mechanism which gives the range its
name is a duplex stainless steel conical thrust ring fitted between the
door and hub, transmitting the pressure load uniformly around the full
360° circumference of the hub.
Based in Charlotte, North Carolina,
I nteg ral Safety D evice s
SPX Corporation (NYSE: SPW) is a global
Safety has been engineered into the Bandlock™ 2 at every stage of
Fortune 500 multi-industry manufacturing
its design and manufacture. A hand-operated pressure warning screw
leader. The company’s highly-specialized,
integrated into the mechanism prevents the door being unlocked
engineered products and technologies serve
until it is confirmed that the vessel’s internal pressure has been
customers in three primary strategic growth
relieved. Additional secondary safety features, such as mechanical key
markets: infrastructure, process solutions, and
interlocks, can be fitted and integrated with control valve operations.
diagnostic systems. Many of SPX’s innovative
For complete safety, the locking band can be seen at all times, which
solutions are playing a role in helping to
satisfies design code requirements and means that the operator can
meet rising global demand, particularly in
actually see that the door is securely closed and locked.
emerging markets, for electricity, processed
foods and beverages and vehicle services.
Door H i ng i ng
The company’s products include thermal heat
For horizontal use the door is double pivoted on hinges with self-
transfer equipment for power plants; power
lubricating bearings. The bolted fitment allows adjustment for wear and
transformers for utility companies; process
can be specified for right or left swing.
equipment for the food & beverage industry;
and diagnostic tools and equipment for the
vehicle service industry. For more information,
please visit www.spx.com.
Vertical installation includes a davit which enables the Bandlock™ 2
door to be lifted and swung clear of the hub. At diameters over 30”,
lifting eyebolts are normally fitted instead of the davit, so that the door
can be lifted out of the way.
Typical product applications
S e a l M at e r i a l
The standard seal is 80° shore hardness Nitrile material.
Viton, HNBR and Rapid Gas Decompression (RGD) resistant
material grades are also available. A range of materials are
available to cover a temperature range of -45°C to +210°C
(-49°F to +410°F) according to the elastomer specified.
Pipeline Pig Traps
Filters
Coalescers
H y d r o s tat i c T e s t i n g
Normally carried out as part of the final vessel test but an
Strainers
individual closure hydrotest can be provided as an option.
Separators
U n iqu e S eal with I nteg ral
A n t i - E xt r u s i o n S p r i n g
To give a completely pressure-tight seal, the purpose-designed
servo acting lip seal energizes at zero pressure. For both
Meter Skid Systems
Hydrocyclones
Horizontal and Vertical Installations the seal is housed in the
door away from the working area for protection and long life,
and is easily fitted without tools. The one-piece moulding is
available in a range of elastomers and incorporates a stainless
steel spring to prevent extrusion and provide a full vacuum
capability.
Bandlock™ 2 Unique Seal
P re s s u re Wa r n i n g
S c re w
B a n d l o ck ™ 2
Seal
P re s s u re Wa r n i n g
S c re w S e a l
Lo ck i n g P l a t e
and Segment
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S i z e an d Pr e ssu r e Rang e
A p p r ov e d D e s i g n
Bandlock™ 2 is available to suit differing vessel sizes and
Standard units meet ASME VIII Div.1. The requirement of
pressures from 6” to 100” diameters with hub sized for
other pressure vessel codes, such as ASME VIII Div. 2 and
welding to any diameter and thickness, for any pressure
PD5500 can be accommodated. ASME Code Stamp with
from ASME Class 150 though to 2500 (425 bar working
U-2A partial data report can be furnished as an option. Code
pressure).
stamping verifies shop inspection of the closure and materials
by an ASME Authorised Inspector.
M at e r i a l s
Forged steel hubs with forged or plate doors can be
E u r o p e a n P r e s s u r e Eq u i p m e n t
supplied to meet all international material specifications.
D i r e ct i v e ( 9 7 / 2 3 / EC )
NACE Standard MR-01-75 / ISO 15156 materials are
The following options are available:
available.
Technical file — submitted to vessel fabricator for incorporation
into CE Marking of vessel
CE Marking of Closure by GD Engineering
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T e c h n i ca l S p e c i f i cat i o n s
Size Range
6” to 100” Nominal diameter
AS M E 1 5 0 # t h r o u g h t o 2 5 0 0 #
Class Ratings
Fo r P r e s s u r e s i n e x c e s s o f 2 5 0 0 # c o n t a c t G D E n g i n e e r i n g .
AS M E V I I I D i v i s i o n 1
AS M E V I I I D i v i s i o n 1 w i t h ‘ U ’ S t a m p
Design Specifications
AS M E V I I I D i v i s i o n 2
AS M E V I I I D i v i s i o n 2 w i t h " U " S t a m p
PD 5500 / B S E N 13445
Closure Orientation
H o r i z o n t a l o r Ve r t i c a l .
AS M E B 3 1 . 3 , B 3 1 . 4 , B 3 1 . 8
Te r m i n a t i o n D e s i g n S p e c i f i c a t i o n s
Other International standards are available on request.
Ty p e s o f C o n n e c t i o n
B u t t We l d e d , B u t t We l d e d w i t h m i t r e f o r i n c l i n e d / d e c l i n e d v e s s e l s , R e d u c e d
Access or Flanged to clients requirements.
AST M A 3 5 0 L F 2 / AS M E I I S A 3 5 0 L F 2
AST M A 1 0 5 / AS M E I I S A 1 0 5
Materials of Construction
AST M A 6 9 4 F 4 2 t o AST M A 6 9 4 F 7 0
Grade 304L or 316L Stainless Steel
Duplex Stainless Steel (U NS S31803)
Elastomeric Sealing
N i t r i l e , Vi t o n a n d R a p i d G a s D e c o m p r e s s i o n R e s i s t a n t . O t h e r m a t e r i a l o p t i o n s
available on request.
Standard Closure Finish
Removable rust preventative for client to finish paint after welding to vessel.
Special Closure Finish
G r a d e 3 1 6 S t a i n l e s s S t e e l o r I n c o n n e l 6 2 5 We l d O v e r l a y
Ac c e s s o r i e s
Th e B a n d l o ck ™ 2 C l o s u r e c a n b e f i t t e d w i t h a ‘ S m i t h F l o w C o n t r o l ’ Ty p e D L- 3
I n t e r l o ck . O t h e r t y p e s o f i n t e r l o ck s a v a i l a b l e o n r e q u e s t .
H o r i z o n t a l C l o s u r e s c a n b e s u p p l i e d w i t h p r o t e c t i v e w e a t h e r c o v e r s ( Ve r t i c a l
closures are supplied with protective weather covers as standard).
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Ba n d lo c k ™ 2 C o m p o n e n t s
Vertical Closure Components c/w Davit
Horizontal Closure Components
Handwheel
Name Plate
Universal
Handle
Davit Arm
Universal
Handle
Hinge
Drive
Link
Instruction
Plate
Lo ck i n g
Band
Drive
Link
Adjuster
S c re w
P re s s u re
Wa r n i n g
S c re w
P re s s u re
Wa r n i n g
S c re w
Horseshoe
Link
Lo ck i n g B a n d
D r a i n G ro o v e
Horseshoe
Link
Vertical Closure Components: Lift-Out Arrangement
Universal Handle
Segmented
Lo ck i n g B a n d
Drive Link
Lifting Lugs
P re s s u re
Wa r n i n g
S c re w
Horseshoe
Link
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Name Plate
OPERATING SE Q UENCE
Operational safety has been engineered into the
Bandlock™ 2 Closure at every stage of its design and
manufacture.
Step 1
Before attempting to open the closure, check that the
vessel is fully isolated, drained and vented from any
ste p 1
pressure source. On completion of the isolation and
venting procedure, slacken off the pressure warning screw
without attempting to remove it, any residual pressure in
the unit will be indicated. Should an indication be given,
close the pressure warning screw and re-check the status
of all valves.
ste p 2
Step 2
When completely satisfied that the closure is safe to open,
remove the pressure warning screw and its integral locking
plate from the closure.
Step 3
Locate the universal handle into the drive link mechanism
attached to the Horseshoe mechanism. Make sure that the
ste p 3
universal handle is positively located in the hole provided.
Step 4
Rotate the universal handle anti-clockwise through
approximately 180°. This will actuate the drive link and
horseshoe mechanism and progressively contract the band
onto the door recess. The universal handle should then be
removed.
ste p 4
Step 5
Using the door hinge handle, swing the door into its open
position with minimal force. The door is mounted on a
double pivot mechanism which gives a degree of straight
line movement and also allows the door to be rotated for
access to the seal and band.
Closing the Bandlock™ 2 Closure is simply a reversal of
the opening sequence.
ste p 5
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Bandlock™ 2
Q UICK OPENING CLOSURE
The SPX Flow Technology segment designs, manufactures and installs highly engineered solutions used to process, blend, meter and transport fluids, in addition to solutions for air
and gas filtration and dehydration. The segment supports global food and beverage, dairy, pharmaceutical, oil and gas, energy, and industrial markets. SPX (NYSE: SPW) is a global
Fortune 500 multi-industry manufacturing leader with over $5 billion in annual revenue, operations in more than 35 countries and over 18,000 employees. For more information,
please visit www.spx.com
SPX f low t e c h n o lo gy
SPX International Ltd
Retford Road
Worksop
Nottinghamshire, S80 2PY
P: +44 1909 482323
F: +44 1909 477902
E: gd@spx.com
SPX reserves the right to incorporate our latest design and material changes without notice or obligation.
Design features, materials of construction and dimensional data, as described in this bulletin, are provided for your information only and should not be relied upon unless confirmed
in writing. Please contact your local sales representative for product availability in your region. For more information visit www.spx.com.
“The green “>” is a trademark of SPX Corporation, Inc.”
Issued: GD-1020 - EN - 01/2013 COPYRIGHT © 2012 SPX Corporation