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GRUVLOK Clamp Coupling: Clamp, 4 in x 4 in, Ductile Iron, NBR Seal - Grooved Pipe Couplings
GRUVLOKGrooved Pipe Couplings

GRUVLOK Clamp Coupling: Clamp, 4 in x 4 in, Ductile Iron, NBR Seal

The GRUVLOK Clamp Coupling is a 4 in x 4 in grooved pipe coupling made of ductile iron with an NBR seal, rated for a maximum operating pressure of 300 psi at 150° F (MPN 0390003721). 3G Electric interprets this…

SKU 3G-OTH-468218

Brand
GRUVLOK
Item
Clamp Coupling: Clamp, 4 in x 4 in, Ductile Iron, NBR Seal
Category
Grooved Pipe Couplings
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Technical Specifications

GRUVLOK
Manufacturer Part Number
0390003721
Type
4 in x 4 in, Ductile Iron, NBR Seal, 300 psi @ 150° F
Fitting Pipe Size
4 in x 4 in
Maximum Operating Pressure
300 psi @ 150° F
View Full Spec Sheet

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GRUVLOK Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The GRUVLOK Clamp Coupling is a 4 in x 4 in grooved pipe coupling made of ductile iron with an NBR seal, rated for a maximum operating pressure of 300 psi at 150° F (MPN 0390003721). 3G Electric interprets this demand, sources the genuine GRUVLOK component, and supports your project across 14 industrial departments — with specialist depth in combustion, pumps and controls as an authorised distributor.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is a GRUVLOK clamp coupling used for?

A GRUVLOK clamp coupling joins grooved-end pipe in fire protection, HVAC, and industrial piping systems. It provides a flexible, leak-tight connection rated for 300 psi at 150 °F, using a ductile-iron housing and NBR seal.

What are the specifications of the GRUVLOK 0390003721 clamp coupling?

The GRUVLOK 0390003721 is a 4 in x 4 in grooved pipe coupling made of ductile iron with an NBR seal. Its maximum operating pressure is 300 psi at 150 °F. It is designed for 4-inch grooved pipe and supplied by 3G Electric.

Where to buy GRUVLOK clamp couplings worldwide?

3G Electric supplies genuine GRUVLOK clamp couplings worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us to order the 4 in x 4 in model (MPN 0390003721) for your industrial project.

How to install a GRUVLOK grooved pipe coupling?

To install a GRUVLOK coupling, ensure pipe ends are clean and grooved per manufacturer specs. Lubricate the NBR gasket, place it over both pipe ends, then position the ductile-iron housing over the gasket. Tighten bolts evenly to the recommended torque.

Used in

Common applications for GRUVLOK
Fire-protection systems — GRUVLOK ductile iron butterfly valves (e.g., SKU 3DVX7) for water-based sprinkler and standpipe networks.
Chemical processing — GRUVLOK carbon steel butterfly valve with 316 stainless steel disc (SKU 60WR76) for handling corrosive media.
General water distribution — GRUVLOK ductile iron butterfly valve with EPDM seat (SKU 60WR98) for municipal or industrial water lines.
HVAC piping — GRUVLOK grooved-end butterfly valves for chilled water or hot water systems requiring quick installation.
Industrial process control — GRUVLOK lever-operated butterfly valve (SKU 60WR82) for throttling or isolation in chemical media applications.

GRUVLOK Products

3G Electric supplies GRUVLOK grooved pipe couplings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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