DUR O LOK
®
DUR O LOK ® couplings are all-purpose,
lightweight connectors designed to replace
ANSI series 150 - 2500 flanges.
DUR O LOK
®
The Light Weight, Threadless, Boltless Coupling Alternative
The performance
superiority and
space and weight
provided by
DUR O LOK®
Couplings will
make them the
preferred choice
in many pipeconnecting
applications.
DUR O LOK® couplings are all-purpose, lightweight connectors designed
to replace ANSI series 150 - 2500 flanges. The design of DUR O LOK®
couplings ensures reliable operation over a wide range of temperatures.
DUR O LOK® couplings have been used in refinery applications for
many years and are specified by UOP for use in CCRTM PlatformingTM,
OleflexTM and SorbexTM processing units, as well as in OptimixTM
FCC feed nozzles.
DUR O LOK® pipe couplings are designed to reduce
maintenance, reduce materials costs, and reduce space
requirements for pipe racks
Features:
• Compact - length and outside diameter reduced by 30% - 50%,
compared to flanges. Allows double the number of pipes per rack.
Provides improved external flow distribution for immersed couplings.
Reduces shadowing for couplings used in process vessels.
• Light weight - weight reduced by 60% - 90%, compared to flanges
• Simple - Number of parts reduced by 55% - 75% per connection,
compared to flanges.
• Fast - Save up to 10-15 minutes to make or break each
connection.
• Non-restrictive - Full port inside diameter eliminates pressure
drop and allows "pigging".
• Smooth interior bore - Minimizes flow disturbances. Eliminates
attrition in catalyst and other solids conveying applications.
• Boltless and threadless - No wrenches required. No torque
measurements required. No bolt holes to align. No need to tighten
connections after thermal cycling. Simplifies painting and insulating.
• Self-energized seal - Sealing force increases with pressure.
Less chance of leaks.
• Thermally stable - Design minimizes thermal expansion effects on
sealing. Tolerates very rapid changes of external or internal
temperatures.
• No interference fits or metal-to-metal sealing - Higher reliability.
Less susceptible to damage.
CCRSM Platforming® process, which produces high-octane gasoline or petrochemical precursors; C3 Oleflex® process, which produces polymer-grade propylene from propane feedback; C4
Oleflex® processes, which separate, convert and upgrade C 4 olefin streams to produce MTBE, acetylene-free crude butadiene, butene-1, isobutylene, and completely saturated LPG; Sorbex®
processes, which separate components from mixtures by liquid-phase adsorption; Parex ® process, which recovers high-purity para-xylene from streams containg mixed xylene isomers and
other aromatic and non-aromatic impurities; Molex® process, which separates paraffins from branched chain and cyclic hydrocarbons; MX-Sorbex® process, which recovers meta-xylene
from streams containing mixed A8 isomers.
BETE
Save Time and Money with Fast,
Simple, Lightweight DUR O LOK®
Pipe Couplings
Set
Screw
Tapered
I.D.
Hub
Split
Coupler
Hub
Tapered O.D.
O-Ring
Gasket
Split Coupler
Wedge Shaped
Teeth
The DUR O LOK® wedge system
The heart of the DUR O LOK® design is the
system of wedge-shaped, circumferential teeth
located on the outside diameter of the hubs
and on the inside diameter of the mating split
coupler. The wedging action of the teeth compresses the gasket and brings the hubs ends
into contact with each other. The outside
diameter of the split coupler is tapered. A ring
with a tapered inside diameter
slides over the split ring segments, forcing them together and
holding them firmly in place. The
tapered retaining ring is secured
with a set screw. The entire connection
process can be accomplished in less than a
minute, without wrenches.
Patented and patents pending
BETE
Heavy Duty Couplings
Don’t Have to Weigh a Ton
DUR O LOK® / Flange - Weight and Dimension Comparison
DUR O LOK®
Pipe
Size
1
1.25
1.5
2
2.5
3
3.5
4
6
8
Weld Neck Flanges
Overall Overall Approx
Pipe
Diameter Length Weight
Schedule
(in.)
(in.)
(lb.)
80
80
XXS
80
160
80
80
160
80
80
2.5
2.85
3
3.5
3.95
4.95
5.45
5.95
7.95
9.95
3.5
3.5
4
5
6
6.5
7
7.5
9.5
11
2.23
2.73
4.67
5.2
8.43
11.21
13.63
21.08
35.84
56.63
BETE
Flange
Flange OD
Class
(in.)
2500
600
2500
2500
600
1500
600
2500
600
600
6.25
5.25
8
9.25
7.5
10.5
9
14
14
16.5
Flange
Flange
Assembly Assembly
Length
Weight
(in.)
(lb.)
7.0
5.2
8.8
10.0
6.2
9.2
6.8
15.0
9.2
10.5
26.6
13.1
57.0
83.3
38.0
102.5
63.2
301.2
173.5
259.1
DUR O LOK
®
Compact Pipe Coupling
DUR O LOK® Materials
• Carbon steel - A234
• Stainless steel - 304,
316, 321, 347
• Other materials available
• Material traceability
available
DUR O LOK® Quality
• Designed to ASME Section VIII,
ANSI B31.1 and ANSI B31.3
• Quality assurance to
ISO 9001
DUR O LOK ® Pipe Couplings - Dimensions (inches) and Ratings (PSI)
Pipe
Size
Pipe
Sched.
“D”
Pipe
O.D.
“B”
Pipe
I.D.
“A”
Overall
Diameter
“C”
Tapered
Ring length
“L”
Overall
Length
“W”
Nominal
Wall
1
1
1 1/4
1 1/4
1 1/4
1 1/2
1 1/2
1 1/2
1 1/2
2
2
2
2 1/2
2 1/2
2 1/2
3
3
3
3
3 1/2
3 1/2
4
4
4
4
4
5
5
6
6
8
8
40
80
40
80
160
40
80
160
xxs
40
80
160
40
80
160
10
40
80
160
40
80
10
40
80
120
160
40
80
40
80
40
80
1.315
1.315
1.660
1.660
1.660
1.900
1.900
1.900
1.900
2.375
2.375
2.375
2.875
2.875
2.875
3.500
3.500
3.500
3.500
4.000
4.000
4.500
4.500
4.500
4.500
4.500
5.563
5.563
6.625
6.625
8.625
8.625
1.049
0.957
1.380
1.278
1.160
1.610
1.500
1.338
1.100
2.067
1.939
1.687
2.469
2.323
2.125
3.260
3.068
2.900
2.624
3.548
3.364
4.260
4.026
3.826
3.624
3.438
5.047
4.813
6.065
5.761
7.981
7.625
2.5
2.5
2.85
2.85
2.85
3.00
3.00
3.00
3.00
3.50
3.50
3.50
3.95
3.95
3.95
4.95
4.95
4.95
4.95
5.45
5.45
5.95
5.95
5.95
5.95
5.95
6.95
6.95
7.95
7.95
9.95
9.95
1.45
1.45
1.45
1.45
1.45
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
1.95
2.95
2.95
2.95
2.95
2.95
2.95
3.50
3.50
3.50
3.50
3.50
4.00
4.00
4.00
4.00
5.00
5.00
5.00
6.00
6.00
6.00
6.50
6.50
6.50
6.50
7.00
7.00
7.50
7.50
7.50
7.50
7.50
8.50
8.50
9.50
9.50
11.00
11.00
0.133
0.179
0.140
0.191
0.250
0.145
0.200
0.281
0.400
0.154
0.218
0.344
0.203
0.276
0.375
0.120
0.216
0.300
0.438
0.226
0.318
0.120
0.237
0.337
0.438
0.531
0.258
0.375
0.280
0.432
0.322
0.500
Approx. Pressure Rating (PSI)*
Weight Carbon
304
(lbs.)
Steel Stainless Steel
2.09
2.23
2.52
2.73
2.96
3.44
3.74
4.15
4.67
4.63
5.20
6.21
6.32
7.26
8.43
8.00
9.76
11.21
13.41
11.64
13.63
10.51
13.75
16.37
18.88
21.08
22.19
26.55
28.24
35.84
43.03
56.63
2850
3950
2350
3275
4400
2100
2975
4225
6175
1775
2575
4225
1950
2700
3600
900
1675
2375
3600
1525
2200
700
1425
2075
2725
3150
1250
1850
1125
1775
1000
1425
3025
4175
2475
3475
4675
2225
3150
4575
6850
1875
2725
4475
2050
2850
3800
975
1775
2525
3800
1625
2325
750
1500
2175
2900
3325
1325
1950
1200
1900
1050
1500
*Per Appendix 24 of the 1988 ASME Code, Section VIII, Div. 1. Maximum Temperature: 400°F (204°C) with viton o-ring, 450°F (232°C) with silicon rubber o-ring. Gaskets with higher
temperature ratings available.
BETE Fog Nozzle, Inc. • 50 Greenfield Street • P.O. Box 1438 • Greenfield, MA 01301
Phone: 413-772-2166 • Fax: 413-772-6729 • e-mail: sales@bete.com • www.bete.com
DUR O LOK® Quote Information
Thank you for your inquiry about DUR O LOK® couplings. Please provide the information below
to assist us in supplying the right coupling for your application.
Customer Information:
Name:
Company:
Address:
City:
State:
Phone:
Fax:
Zip:
Country:
e-mail:
I am interested in the DUR O LOK® couplings because: (check all that apply)
• I want to save space
• I want to save weight
• I want to simplify my piping
• I’m attracted to the unique seal benefits
• I want to save maintenance time
• Other
Piping Service Requirements:
temperature:
pressure:
material transported:
industry:
application or process:
external loading (shear, bending, torsion, etc) and magnitude:
Coupling Requirements:
Seal:
pipe size:
• Viton O-ring (400°F max)
schedule:
• Silicone rubber O-ring (450°F max)
material:
• Grafoil® flat gasket (1500°F max)
number required
code requirements
Notes: carbon steel couplings are supplied with black oxide finish.
Bete Fog Nozzle, Inc. 50 Greenfield St Greenfield, MA 01301 USA 413-772-0846 (phone) 413-772-6729 (fax) e-mail:sales@bete.com