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GRUVLOKGrooved Pipe Couplings

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

The GRUVLOK Rigid Coupling is a rigid bolted-clamp grooved pipe coupling in a 3 in x 3 in size, constructed from ductile iron with an EPDM seal and rated for a maximum operating pressure of 750 psi (MPN 390213410).

SKU 3G-OTH-468322

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

GRUVLOK
Manufacturer Part Number
390213410
Type
3 in x 3 in, Ductile Iron, EPDM 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 from ductile iron with an EPDM seal and rated for a maximum operating pressure of 750 psi (MPN 390213410).

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, air, and other non-corrosive services.

What are the specifications of the GRUVLOK rigid coupling 390213410?

This GRUVLOK rigid coupling is a 3 in x 3 in rigid bolted clamp made of ductile iron with an EPDM seal. It has a maximum operating pressure of 750 psi and is identified by manufacturer part number 390213410.

Where to buy GRUVLOK rigid couplings worldwide?

3G Electric supplies GRUVLOK rigid couplings worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your site. Contact us for a quote on the 3 in x 3 in ductile iron coupling rated for 750 psi.

How to install a GRUVLOK rigid coupling?

Installation requires clean, properly grooved pipe ends. Lubricate the EPDM gasket, place it over one pipe end, then slide the coupling housing over the gasket. Insert bolts and tighten evenly to the manufacturer's torque specification. 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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GRUVLOK Clamp Coupling: 5 in x 5 in, NBR Seal, 750 psi, Ductile Iron, Grooved x Grooved x Threaded (MPN 0390113280). Key specifications — Maximum Operating Pressure: 750 psi; Brand: GRUVLOK.
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GRUVLOK Clamp Coupling: Rigid Bolted, 6 in x 6 in, Ductile Iron, NBR Seal, 750 psi, 11 in Overall Lg (MPN 0390010304). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 750 psi; Fitting Pipe Size: 6 in x 6 in.
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GRUVLOK Clamp Coupling: Rigid Bolted, 6 in x 6 in, Ductile Iron, NBR Seal, 750 psi, 11 in Overall Lg (MPN 0390010304). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 750 psi; Fitting Pipe Size: 6 in x 6 in.
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GRUVLOK Rigid Coupling: Clamp, 8 in x 8 in, NBR Seal, 600 psi, Ductile Iron, Grooved x Grooved (MPN 390213866). Key specifications — Maximum Operating Pressure: 600 psi; Brand: GRUVLOK.
GRUVLOK Clamp Coupling: 6 in x 6 in, EPDM Seal, 300 psi, Ductile Iron, Grooved x Grooved x Grooved (MPN 0390209161). Key specifications — Maximum Operating Pressure: 300 psi; Brand: GRUVLOK.
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GRUVLOK Clamp Coupling: 6 in x 6 in, EPDM Seal, 300 psi, Ductile Iron, Grooved x Grooved x Grooved (MPN 0390209161). Key specifications — Maximum Operating Pressure: 300 psi; Brand: GRUVLOK.
GRUVLOK Clamp Coupling: 8 in x 8 in, EPDM Seal, 800 psi, Ductile Iron, Grooved x Grooved x Grooved (MPN 0390113410). Key specifications — Maximum Operating Pressure: 800 psi; Brand: GRUVLOK.
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GRUVLOK Clamp Coupling: 8 in x 8 in, EPDM Seal, 800 psi, Ductile Iron, Grooved x Grooved x Grooved (MPN 0390113410). Key specifications — Maximum Operating Pressure: 800 psi; Brand: GRUVLOK.
GRUVLOK Clamp Coupling: Clamp, 1 in x 1 in, Ductile Iron, EPDM Seal, 300 psi @ 150° F (MPN 0390211001). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 300 psi @ 150° F; Fitting Pipe Size: 1 in x 1 in.
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