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GRUVLOKGrooved Pipe Couplings

GRUVLOK Rigid Coupling: Rigid Bolted Clamp, 8 in x 8 in, Ductile Iron, NBR Seal

The GRUVLOK Rigid Coupling is a rigid bolted-clamp grooved pipe coupling, available in an 8 in x 8 in size. Constructed from ductile iron with an NBR seal, it is rated for a maximum operating pressure of 600 psi (MPN…

SKU 3G-OTH-468333

Brand
GRUVLOK
Item
Rigid Coupling: Rigid Bolted Clamp, 8 in x 8 in, Ductile Iron, NBR Seal
Category
Grooved Pipe Couplings
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Technical Specifications

GRUVLOK
Manufacturer Part Number
390213266
Type
8 in x 8 in, Ductile Iron, NBR Seal, 600 psi
Fitting Pipe Size
8 in x 8 in
Maximum Operating Pressure
600 psi
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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, available in an 8 in x 8 in size. Constructed from ductile iron with an NBR seal, it is rated for a maximum operating pressure of 600 psi (MPN 390213266).

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 rigid connection that resists axial movement, making it suitable for high-pressure applications up to 600 psi.

What are the specifications of the GRUVLOK rigid coupling 390213266?

The GRUVLOK rigid coupling (MPN 390213266) is an 8 in x 8 in rigid bolted clamp made of ductile iron with an NBR seal. It has a maximum operating pressure of 600 psi and is designed for grooved pipe connections in demanding industrial environments.

Where to buy a GRUVLOK rigid coupling worldwide?

3G Electric supplies the GRUVLOK rigid coupling (MPN 390213266) to customers worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this 8 in x 8 in ductile iron coupling.

How to install a GRUVLOK rigid coupling?

Installation requires clean, properly grooved pipe ends. Lubricate the NBR gasket, place it over one pipe end, then slide the coupling housing over both pipe ends. Tighten the bolts evenly to the torque specified by GRUVLOK. Always follow the manufacturer's instructions for pressure ratings and bolt 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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