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GRUVLOKGrooved Pipe Couplings

GRUVLOK Rigid Coupling: Clamp, 3 in x 3 in, NBR Seal, 750 psi, Ductile Iron

The GRUVLOK Rigid Coupling is a grooved pipe clamp coupling with a 3 in x 3 in size, NBR seal, and ductile iron construction, rated for a maximum operating pressure of 750 psi. It connects grooved x grooved pipe ends…

SKU 3G-OTH-460113

Brand
GRUVLOK
Item
Rigid Coupling: Clamp, 3 in x 3 in, NBR Seal, 750 psi, Ductile Iron
Category
Grooved Pipe Couplings
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Technical Specifications

GRUVLOK
Manufacturer Part Number
390213858
Type
3 in x 3 in, NBR Seal, 750 psi, Ductile Iron, Grooved x Grooved
Maximum Operating Pressure
750 psi
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GRUVLOK Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The GRUVLOK Rigid Coupling is a grooved pipe clamp coupling with a 3 in x 3 in size, NBR seal, and ductile iron construction, rated for a maximum operating pressure of 750 psi. It connects grooved x grooved pipe ends for rigid mechanical joining.

Frequently Asked Questions

What is a GRUVLOK rigid coupling used for?

A GRUVLOK rigid coupling is used to mechanically join grooved-end pipe in industrial fire protection, HVAC, and process piping systems. It provides a rigid, leak-tight connection rated for up to 750 psi, suitable for high-pressure water, air, and other non-corrosive fluids.

What are the specifications of the GRUVLOK rigid coupling 390213858?

The GRUVLOK rigid coupling model 390213858 is a 3 in x 3 in grooved x grooved clamp with an NBR seal and ductile iron construction. It has a maximum operating pressure of 750 psi and is designed for rigid mechanical joining of grooved pipe ends.

Where to buy GRUVLOK rigid couplings worldwide?

3G Electric supplies GRUVLOK rigid couplings worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on the 3 in x 3 in model 390213858.

How to install a GRUVLOK rigid coupling?

To install a GRUVLOK rigid coupling, ensure pipe ends are clean and grooved per manufacturer specifications. Lubricate the NBR gasket, place it over one pipe end, then slide the coupling housing over both pipe ends. Tighten bolts evenly to the torque recommended by GRUVLOK for a rigid joint.

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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