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GRUVLOKGrooved Pipe Couplings

GRUVLOK 3 in x 3 in Grooved Pipe Coupling, NBR Seal, 750 psi, Ductile Iron

The GRUVLOK Rigid Coupling is a 3 in x 3 in grooved pipe clamp made of ductile iron with an NBR seal, rated for a maximum operating pressure of 750 psi. It connects grooved x grooved pipe ends for rigid mechanical…

SKU 3G-OTH-460111

Brand
GRUVLOK
Item
3 in x 3 in Grooved Pipe Coupling, NBR Seal, 750 psi, Ductile Iron
Part Number
390213658
Category
Grooved Pipe Couplings
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

GRUVLOK
Manufacturer Part Number
390213658
Type
3 in x 3 in, NBR Seal, 750 psi, Ductile Iron, Grooved x Grooved
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 3 in x 3 in grooved pipe clamp made of ductile iron with an NBR seal, rated for a maximum operating pressure of 750 psi. It connects grooved x grooved pipe ends for rigid mechanical joining in industrial piping systems.

Frequently Asked Questions

What is the GRUVLOK rigid coupling used for?

The GRUVLOK rigid coupling is used to mechanically join grooved-end pipe in industrial piping systems. It provides a rigid, leak-resistant connection for applications such as HVAC, fire protection, and process piping, handling pressures up to 750 psi with a ductile iron body and NBR seal.

What are the specifications of the GRUVLOK rigid coupling?

The GRUVLOK rigid coupling is a 3 in x 3 in grooved pipe clamp with a ductile iron body and NBR seal. It connects grooved x grooved pipe ends and is rated for a maximum operating pressure of 750 psi. The manufacturer part number is 390213658.

Where to buy the GRUVLOK rigid coupling worldwide?

3G Electric supplies the GRUVLOK rigid coupling worldwide, handling full logistics and customs clearance for international delivery. As a global industrial sourcing partner, we provide this coupling and support for grooved piping systems across multiple industries.

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 coupling housing and tighten bolts evenly to the recommended torque. Always follow GRUVLOK installation guidelines for pressure ratings.

Used in

Common applications for GRUVLOK
Fire protection systems — GRUVLOK grooved couplings and fittings for joining sprinkler pipe, such as the 6-inch coupling (SKU 46KK70) rated for 300 psi.
HVAC piping — GRUVLOK flexible couplings (e.g., SKU 408JM0) to accommodate thermal movement in chilled water and heating systems.
Process piping — GRUVLOK concentric reducer elbow (SKU 408GX7) for changing pipe direction and size in chemical and industrial processes.
Industrial piping — GRUVLOK high-pressure couplings (e.g., SKU 408HF6) rated to 1,000 psi for demanding applications.
Mechanical piping systems — GRUVLOK rigid couplings (e.g., SKU 60XP12) for joining large-diameter pipe in water distribution.
Plumbing systems — GRUVLOK NSF 61 approved couplings for potable water applications, ensuring compliance with health standards.
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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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Cross-referenced by specification & description
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This rigid bolted-clamp grooved pipe coupling joins grooved-end pipe in fire protection, HVAC, and industrial piping systems. Constructed of ductile iron with an NBR seal, it is rated for a maximum operating pressure of 750 psi and provides a leak-tight, mechanically locked connection
GRUVLOK
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This rigid coupling joins grooved-end pipe for mechanical piping systems. It features a ductile iron body with an NBR seal and is rated for a maximum operating pressure of 750 psi. The grooved x grooved connection provides a leak-tight joint suitable for high-pressure water, air, and non-corrosive fluids
GRUVLOK
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Rigid bolted-clamp grooved pipe coupling for joining grooved-end pipe in fire protection, HVAC, and industrial piping systems. Constructed of ductile iron with an NBR seal, rated for maximum operating pressure of 750 psi. Provides a leak-tight, mechanically locked connection that resists axial movement
This grooved pipe coupling joins grooved-end pipe in fire protection, HVAC, and industrial piping systems. Constructed of ductile iron with an NBR seal, it is rated for a maximum operating pressure of 300 psi at 150°F. The 3 in x 3 in size accommodates standard-groove pipe for water and light oil services
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This grooved pipe coupling joins grooved-end pipe in fire protection, HVAC, and industrial piping systems. Constructed of ductile iron with an NBR seal, it is rated for a maximum operating pressure of 300 psi at 150°F. The 3 in x 3 in size accommodates standard-groove pipe for water and light oil services

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