4″ DI RIGID COUPLING GROOVED 1G ST

The 4 inch di rigid coupling grooved 1g st mech is a heavy-duty mechanical pipe joiner designed to provide a secure, non-flexible connection between grooved-end pipes. manufactured from high-strength ductile iron, this rigid coupling is engineered to eliminate linear and angular movement at the joint, making it ideal for vertical mains, risers, and valve manifold configurations where pipe alignment must remain fixed.
The coupling features a 1g / st bolt-pad design that allows for quick and easy installation using standard hand tools. it includes a high-grade epdm pressure-responsive gasket that provides a leak-proof seal under both pressure and vacuum conditions. with a 300 psi working pressure rating and a durable red fusion bonded epoxy finish, this coupling is a reliable choice for commercial fire protection and industrial mechanical systems.

Technical Specification

Nominal Size: 4 inch (dn100)
Material: ductile iron (di) astm a536 / ggg50
Coupling Type: rigid coupling (grooved)
Design Feature: 1g / st (standard/single bolt-pad style)
Connection: grooved ends (mech)
Working Pressure: 300 psi (21 bar)
Gasket Material: epdm (grade e) standard
Finish: red fusion bonded epoxy (fbe) or galvanized