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GRUVLOKGrooved Pipe Couplings

GRUVLOK Rigid Coupling: Rigid Bolted Clamp, 2 1/2 in x 2 1/2 in, Ductile Iron, NBR Seal

The GRUVLOK Rigid Coupling is a rigid bolted clamp grooved pipe coupling, sized 2-1/2 in x 2-1/2 in, constructed of ductile iron with an NBR seal, and rated for a maximum operating pressure of 750 psi (MPN…

SKU 3G-OTH-468325

Brand
GRUVLOK
Item
Rigid Coupling: Rigid Bolted Clamp, 2 1/2 in x 2 1/2 in, Ductile Iron, NBR Seal
Category
Grooved Pipe Couplings
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Technical Specifications

GRUVLOK
Manufacturer Part Number
390213256
Type
2 1/2 in x 2 1/2 in, Ductile Iron, NBR Seal, 750 psi
Fitting Pipe Size
2-1/2 in x 2-1/2 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, sized 2-1/2 in x 2-1/2 in, constructed of ductile iron with an NBR seal, and rated for a maximum operating pressure of 750 psi (MPN 390213256). 3G Electric sources this genuine OEM component 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, ensuring you get the right answer, not just a catalog.

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 to 750 psi, suitable for high-pressure water, air, and light slurry applications.

What are the specifications of the GRUVLOK rigid coupling 390213256?

This GRUVLOK rigid coupling (MPN 390213256) is a 2-1/2 in x 2-1/2 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 couplings worldwide?

3G Electric supplies genuine GRUVLOK rigid couplings worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us to order the 2-1/2 in rigid coupling (MPN 390213256) for your project.

How to install a GRUVLOK rigid coupling?

To install a GRUVLOK rigid coupling, ensure pipe ends are clean and grooved per manufacturer specs. Lubricate the NBR gasket, place it over one pipe end, then slide the coupling housing over both pipe ends. Tighten bolts evenly to the recommended torque for a rigid, 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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GRUVLOK Clamp Coupling: 4 in x 3 in, NBR Seal, 500 psi, Ductile Iron, Grooved x Grooved x Grooved (MPN 0390111201). Key specifications — Maximum Operating Pressure: 500 psi; Brand: GRUVLOK.
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