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GRUVLOKGrooved Pipe Couplings

GRUVLOK Rigid Coupling: Clamp, 2 1/2 in x 2 1/2 in, NBR Seal, 750 psi, Ductile Iron

The GRUVLOK Rigid Coupling is a bolted, ductile-iron grooved pipe clamp with a 2 1/2 in x 2 1/2 in size and NBR seal, rated for a maximum operating pressure of 750 psi (MPN 390213856).

SKU 3G-OTH-460123

Brand
GRUVLOK
Item
Rigid Coupling: Clamp, 2 1/2 in x 2 1/2 in, NBR Seal, 750 psi, Ductile Iron
Category
Grooved Pipe Couplings
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Technical Specifications

GRUVLOK
Manufacturer Part Number
390213856
Type
2 1/2 in x 2 1/2 in, NBR Seal, 750 psi, Ductile Iron, Bolted
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 bolted, ductile-iron grooved pipe clamp with a 2 1/2 in x 2 1/2 in size and NBR seal, rated for a maximum operating pressure of 750 psi (MPN 390213856).

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, using a ductile-iron housing and NBR seal for reliable performance in water and light oil services.

What are the specifications of the GRUVLOK rigid coupling 390213856?

The GRUVLOK rigid coupling (MPN 390213856) is a 2 1/2 in x 2 1/2 in bolted clamp with a ductile-iron body and NBR seal. Its maximum operating pressure is 750 psi. It is designed for grooved pipe systems and supplied by 3G Electric for worldwide delivery.

Where to buy GRUVLOK rigid couplings worldwide?

3G Electric supplies GRUVLOK rigid couplings worldwide, handling full logistics and customs clearance. As a global industrial sourcing partner, we provide the GRUVLOK 390213856 coupling and support procurement for grooved piping projects across all regions.

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 the pipe ends, then position the ductile-iron housing halves and tighten the bolts evenly to the recommended torque. Always follow GRUVLOK's published installation instructions.

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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