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GRUVLOKGrooved Pipe Couplings

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

The GRUVLOK Rigid Coupling is a rigid bolted-clamp grooved pipe coupling in a 3 in x 3 in size, constructed of ductile iron with an NBR seal and rated for a maximum operating pressure of 750 psi. 3G Electric sources…

SKU 3G-OTH-468321

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

GRUVLOK
Manufacturer Part Number
390213258
Type
3 in x 3 in, Ductile Iron, NBR Seal, 750 psi
Fitting Pipe Size
3 in x 3 in
Maximum Operating Pressure
750 psi
View Full Spec Sheet

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

Product Description

The GRUVLOK Rigid Coupling is a rigid bolted-clamp grooved pipe coupling in a 3 in x 3 in size, constructed of ductile iron with an NBR seal and rated for a maximum operating pressure of 750 psi. 3G Electric sources this OEM part (MPN 390213258) across 14 industrial departments — and we supply far more than is listed — with specialist depth in combustion, pumps and controls as an authorised distributor for brands including GRUVLOK, Schneider, ABB, Siemens, SKF, Festo, Fluke, Interpump and FBR.

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 rigid coupling used for?

A GRUVLOK rigid coupling joins grooved-end pipe in fire protection, HVAC, and industrial piping systems. It provides a leak-tight, mechanically locked connection rated for 750 psi, suitable for high-pressure water, oil, and gas applications.

What are the specifications of the GRUVLOK rigid coupling 390213258?

The GRUVLOK rigid coupling (MPN 390213258) is a 3 in x 3 in rigid bolted clamp made of ductile iron with an NBR seal. It has a maximum operating pressure of 750 psi and is designed for grooved pipe connections.

Where to buy GRUVLOK rigid coupling 390213258 worldwide?

3G Electric supplies the GRUVLOK rigid coupling 390213258 worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this OEM part to your site, regardless of location.

How to install a GRUVLOK rigid coupling?

To install a GRUVLOK rigid coupling, ensure pipe ends are clean and grooved. Lubricate the NBR gasket, place it over one pipe end, then slide the coupling housing over both pipe ends. Tighten bolts evenly to the manufacturer's torque specification for a secure, leak-free 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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