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Gruvlok Fig. 7377 is a flexible coupling utilizing double groove technology designed for high pressure piping applications. Fig. 7377 is specifically designed for use in mining, oil, gas, slurry, sludge, and hydraulic systems. The maximum working pressure for each pipe schedule and size are listed in the table below. Fig. 7377 is an ideal solution for high pressure applications, exceeding Anvil’s Fig. 7004 capabilities. See page 3 for double groove piping dimensions.
Unit of Measure
Items
7377-Gruvlok--Double-Groove-Coupling

7377 6 GAL DBL GRV EP GSK CPLG

7377-Gruvlok--Double-Groove-Coupling

7377 6 GAL DBL GRV T GSK CPLG

7377-Gruvlok--Double-Groove-Coupling

7377 6 DBL GRV EP GSKT CPLG

7377-Gruvlok--Double-Groove-Coupling

7377 6 DBL GRV E FG GSKT CPLG

7377-Gruvlok--Double-Groove-Coupling

7377 6 DBL GRV T GSKT CPLG
Type N/A Coupling
Style N/A Grooved
Nominal Size N/A 6 in
Housing Material N/A Ductile Iron conforming to ASTM A 536, Grade 65-45-12.
Coatings N/A Hot Dipped Zinc Galvanized (optional) N/A Hot Dipped Zinc Galvanized (optional) N/A Rust inhibiting paint – Color: Orange (standard) N/A Rust inhibiting paint – Color: Orange (standard) N/A Rust inhibiting paint – Color: Orange (standard)
Gasket Material N/A Grade “EP” EPDM (Copper color code) N/A Grade “T” Nitrile (Orange color code) N/A Grade “EP” EPDM (Copper color code) N/A Grade “EP” EPDM (Copper color code) N/A Grade “T” Nitrile (Orange color code)
Gasket Type N/A C Style N/A Flush Gap N/A C Style N/A Flush Gap N/A End Guard
Bolt Material N/A SAE J429, Grade 5, Zinc Electroplated
Heavy Hex Nut Material N/A ASTM A563, Grade A, Zinc Electroplated
Lubrication N/A Gruvlok Xtreme
Min. Service Temperature Range N/A -40 ºF N/A -20 ºF N/A -40 ºF N/A -40 ºF N/A -20 ºF
Max. Service Temperature Range N/A 180 ºF N/A 180 ºF N/A 250 ºF N/A 250 ºF N/A 250 ºF
Max. Working Pressure (Schedule 160) N/A 4000 psi
Max. Working Pressure (Schedule 80) N/A 3000 psi
Min Specified Torque N/A 450 lb·ft
Max Specified Torque N/A 525 lb·ft
Max. End Load (Schedule 160) N/A 137886 lb
Max. End Load (Schedule 80) N/A 103415 lb
Coupling Bolts Size N/A 1 x 5 1/2 in
Coupling Bolts Qty. N/A 4
Product Number N/A 0390139400 N/A 0390139450 N/A 0390011005 N/A 0390011302 N/A 0390011203
UPC Code N/A 66242898314 N/A 65280803429 N/A 66242888604 N/A 66242880066 N/A 66242888601
Weight N/A 42.6 lb