Series G28 Hinged Lever Coupling C-04


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The Series G-28 Hinged Grooved Coupling is designed for quick connect and disconnect services. The housing segments are hinged with a lever handle for easy assembly. The use of the split pin can secure and prevent the accidental opening of the coupling. The Series G-28 can be used in a wide variety of applications with standard rolled or cut grooved pipe. Housings 1 1/2” - 4” (40 mm – 100 mm) feature a smooth outer surface, housings 5” - 12” (125 mm – 300 mm) feature a cross-ribbed design for added strength.

Standard gasket: Grade “E” EPDM or Grade “T” Nitrile.

Standard surface finish: Black electro-deposition coated.

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The Model G-28 Hinged Grooved Coupling is designed for quick connect and disconnect services

 

Series G28  Hinged Lever Coupling C-04 - Couplings

 

Nominal
Size
Pipe
O.D.
Max. Working
Pressure
(CWP)*
ASME/ANSI Pressure ClassRating^
@100°F/@38°C
Max. End
Load
(CWP)
Axial
Displacement †
Angular Movement /
Deflection**†
Dimensions
Approx.
Weight
A B C
in in PSI PSI Lbs in Degrees (°) in in in Lbs
1 1/2 1.9 300 300 850 0-0.06 1° - 54' 2.95  4.65 1.85 2.2
2 2.375 300 300 1320 0-0.06 1° - 45' 3.39 4.76 1.89 2.4
2 1/2 2.875 300 300 1940 0-0.06 1° - 15' 3.62 5.91 1.89 3.1
76.1 mm 3 300 300 2120 0-0.06 1° - 12' 3.62 5.91 1 .89 3.1
3 3.5 300 300 2880 0-0.06 1° - 12' 4.69 6.42 1 .89 4
4 4.5 300 300 4760 0-0.13 1° - 36' 50 8.07 2.05 5.9
139.7 mm 5.5 300 300 7120 0-0.13 1° - 18' 44  9.96 2.05 10.8
5 5.563 300 300 7280 0-0.13 1° - 18' 44 9.96 2.05 10.8
165.1 mm 6.5 300 300 9950 0-0.13 1° - 07' 8.39 10.94 2.05 13.2
6 6.625 300 300 10330 0-0.13 1° -05' 8.50 11.06 2.05 13.2
8 8.625 300 300 17510 0-0.13 0° - 50' 0.95  14.02 2.44 15.2
10 10.75 300 300 27210 0-0.13 0° - 40' 3.50 17.80 2.52 36.1

* Working pressure is based on roll grooved standard wall carbon steel pipe.
^ The ASME/ANSI pressure class rating is not the design or maximum pressure rating, rather is provided for those that are accustomed to specifying or using ASME/ANSI pressure class rated components such as flange, valves, etc.
Allowable Axial Displacement and Angular Movement (deflection) figures are for roll grooved standard steel pipe. Values for cut grooved pipe will be double that of roll grooved. These values are maximums; for design and installation purposes these figures should be reduced by: 50% for 3/4” – 3 1/2”; 25% for 4” and larger to compensate for jobsite conditions.
** Deflection or angular movement is the maximum value that a coupling allows under no internal pressure.

 

Performance Data

The following tables show the maximum working pressures (CWP) of Series G-28 Hinged Lever Coupling used on both carbon steel and stainless steel pipes. The ductile iron couplings can be used in conjunction with stainless steel pipe in non-corrosive environment as the flow media does not come in direct contact with the coupling housings but rather only the gasket.


Unit: psi / Bar
Series G-28 on Carbon Steel Pipe
Nom. Size Cut-Grooved Roll-Grooved
in XS STD STD Sch. 10 Sch. 7
1 1/2 300 300 300 300 NR
2 300 300 300 300 NR
2 1/2 300 300 300 300 NR
2 1/2 300 300 300 300 NR
3 300 300 300 300 NR
4 300 300 300 300 NR
5 300 300 300 300 NR
5 300 300 300 300 NR
6 300 300 300 300 NR
6 300 300 300 300 NR
8 300 300 300 250 NR
10 300 300 300 250 NR
12 300 300 300 250 NR
Unit: psi / Bar
Series G-28 on Stainless Steel Pipe
Nom. Size Cut-Grooved Roll-Grooved
in / mm Sch. 80S Sch. 40S Sch. 40S Sch. 10S Sch. 5S
1 1/2 300 300 300 300 NR
2 300 300 300 300 NR
2 1/2 300 300 300 300 NR
2 1/2 300 300 300 300 NR
3 300 300 300 300 NR
4 300 300 300 175 NR
5 300 300 250 150 NR
5
300
300
250
150
NR
6 300 300 250 150 NR
6 300 300 250 150 NR
8 300 300 200 NR NR
10 300 300 200 NR NR
12 300 300 200 NR NR

Expansion Pipe

Lever handles are factory assembled pretty tight for safety sake. The use of an expansion pipe will be of help for an easy opening or closing.

Expansion Pipe
Size
Applicable Coupling
Sizes
1/2” x 6” 1 1/2" ~4"
3/4” x 8” 5" ~ 8"

Expansion Pipe
Expansion Pipe

(You can easily make your expansion pipe simply by cutting sch. 401/2" or 3/4" pipe to a proper length)

Warning:
Lever handle couplings are not recommended for services where excessive shock-loads are present, as often occur in some concrete pumping applications. When the Series G-28 is used in concrete pumping applications, sound support and bracing practices should always be in effect. All couplings and components should be regularly inspected to ensure they are in good working condition and that the pipe grooves, coupling keys, and gasket are free of any concrete or foreign material.


Please feel free to contact us for more information.

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