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GRUVLOK Clamp Coupling: Bolted, 4 in x 3 in, Ductile Iron, NBR Seal, 500 psi - Grooved Pipe Couplings
GRUVLOKGrooved Pipe Couplings

GRUVLOK Clamp Coupling: Bolted, 4 in x 3 in, Ductile Iron, NBR Seal, 500 psi

The GRUVLOK Clamp Coupling is a bolted grooved pipe coupling in a 4 in x 3 in reducing configuration, constructed from ductile iron with an NBR seal. It is rated for a maximum operating pressure of 500 psi and has an…

SKU 3G-OTH-468307

Brand
GRUVLOK
Item
Clamp Coupling: Bolted, 4 in x 3 in, Ductile Iron, NBR Seal, 500 psi
Category
Grooved Pipe Couplings
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Technical Specifications

GRUVLOK
Manufacturer Part Number
0390008902
Type
4 in x 3 in, Ductile Iron, NBR Seal, 500 psi
Overall Lg
8 7/8 in
Fitting Pipe Size
4 in x 3 in
Maximum Operating Pressure
500 psi
View Full Spec Sheet

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GRUVLOK Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The GRUVLOK Clamp Coupling is a bolted grooved pipe coupling in a 4 in x 3 in reducing configuration, constructed from ductile iron with an NBR seal. It is rated for a maximum operating pressure of 500 psi and has an overall length of 8 7/8 in (MPN 0390008902).

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 clamp coupling used for?

A GRUVLOK bolted clamp coupling joins grooved-end pipes in fire protection, HVAC, and industrial piping systems. This 4 in x 3 in reducing model connects different pipe sizes securely, handling pressures up to 500 psi with a ductile iron body and NBR seal.

What are the specifications of the GRUVLOK 0390008902 coupling?

This GRUVLOK coupling is a bolted, reducing clamp coupling sized 4 in x 3 in. It is made of ductile iron with an NBR seal, rated for 500 psi maximum operating pressure, and has an overall length of 8 7/8 in. The manufacturer part number is 0390008902.

Where to buy a GRUVLOK 4 in x 3 in coupling worldwide?

3G Electric supplies the GRUVLOK 0390008902 clamp coupling to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this ductile iron, 500 psi rated grooved coupling.

How to install a GRUVLOK bolted clamp coupling?

To install a GRUVLOK bolted coupling, ensure pipe ends are clean and grooved per manufacturer specs. Place the gasket over both pipe ends, then position the coupling housing over the gasket. Tighten bolts evenly to the recommended torque—do not overtighten. Always follow GRUVLOK 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: Clamp, 1 1/2 in x 1 1/2 in, Ductile Iron, EPDM Seal, 300 psi @ 150° F (MPN 0390002988). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 300 psi @ 150° F; Fitting Pipe Size: 1-1/2 in x 1-1/2 in.
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