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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

Specifications

Type

 N/A Coupling

Style

 N/A Grooved

Nominal Size

 N/A 8 in

Housing Material

 N/A Ductile Iron conforming to ASTM A 536, Grade 65-45-12.

Coatings

 N/A Hot Dipped Zinc Galvanized (optional)

Gasket Material

 N/A Grade “T” Nitrile (Orange color code)

Gasket Type

 N/A Flush Gap

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 -20 ºF

Max. Service Temperature Range

 N/A 180 ºF

Max. Working Pressure (Schedule 160)

 N/A 3500 psi

Max. Working Pressure (Schedule 80)

 N/A 2500 psi

Min Specified Torque

 N/A 500 lb·ft

Max Specified Torque

 N/A 600 lb·ft

Max. End Load (Schedule 160)

 N/A 204492 lb

Max. End Load (Schedule 80)

 N/A 146060 lb

Coupling Bolts Size

 N/A 1 1/8 x 6 1/2 in

Coupling Bolts Qty.

 N/A 4

Product Number

 N/A 0390139452

UPC Code

 N/A 65280803430

Weight

 N/A 72 lb