Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
GRUVLOK Clamp Coupling: Clamp, 8 in x 8 in, Ductile Iron, NBR Seal - Grooved Pipe Couplings
GRUVLOKGrooved Pipe Couplings

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

The GRUVLOK Clamp Coupling is a grooved pipe coupling in an 8 in x 8 in size, constructed of ductile iron with an NBR seal. It is rated for a maximum operating pressure of 300 psi at 150° F (MPN 0390003804).

SKU 3G-OTH-468252

Brand
GRUVLOK
Item
Clamp Coupling: Clamp, 8 in x 8 in, Ductile Iron, NBR Seal
Category
Grooved Pipe Couplings
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

GRUVLOK
Manufacturer Part Number
0390003804
Type
8 in x 8 in, Ductile Iron, NBR Seal, 300 psi @ 150° F
Fitting Pipe Size
8 in x 8 in
Maximum Operating Pressure
300 psi @ 150° F
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The GRUVLOK Clamp Coupling is a grooved pipe coupling in an 8 in x 8 in size, constructed of ductile iron with an NBR seal. It is rated for a maximum operating pressure of 300 psi at 150° F (MPN 0390003804).

Frequently Asked Questions

What is a GRUVLOK clamp coupling used for?

A GRUVLOK clamp coupling joins grooved-end pipes in fire protection, HVAC, and industrial piping systems. It provides a flexible, leak-tight connection rated for 300 psi at 150° F, using a ductile-iron housing and NBR seal.

What are the specifications of the GRUVLOK 0390003804 clamp coupling?

The GRUVLOK 0390003804 is an 8 in x 8 in grooved pipe coupling made of ductile iron with an NBR seal. It has a maximum operating pressure of 300 psi at 150° F. The manufacturer part number is 0390003804.

Where to buy GRUVLOK clamp couplings worldwide?

3G Electric supplies GRUVLOK clamp couplings worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on the 0390003804 or other GRUVLOK grooved couplings.

How to install a GRUVLOK grooved pipe coupling?

To install a GRUVLOK clamp coupling, ensure pipe ends are clean and grooved per manufacturer specs. Lubricate the NBR gasket, place it over both pipe ends, then position the ductile-iron housing over the gasket and tighten bolts evenly to the recommended 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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from GRUVLOK

View all GRUVLOK parts →
GRUVLOK Metal Pipe Straight: Straight, 8 in x 8 in, Ductile Iron, EPDM Seal, 300 psi @ 150° F (MPN 0390007441). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 300 psi @ 150° F; Fitting Pipe Size: 8 in x 8 in.
GRUVLOK
GRUVLOK Metal Pipe Straight: Straight, 8 in x 8 in, Ductile Iron, EPDM Seal, 300 psi @ 150° F (MPN 0390007441). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 300 psi @ 150° F; Fitting Pipe Size: 8 in x 8 in.
GRUVLOK Clamp Coupling: Clamp, 3 in x 3 in, Ductile Iron, NBR Seal, 300 psi @ 150° F (MPN 0390000842). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 300 psi @ 150° F; Fitting Pipe Size: 3 in x 3 in.
GRUVLOK
GRUVLOK Clamp Coupling: Clamp, 3 in x 3 in, Ductile Iron, NBR Seal, 300 psi @ 150° F (MPN 0390000842). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 300 psi @ 150° F; Fitting Pipe Size: 3 in x 3 in.
GRUVLOK Clamp Coupling: Clamp, 12 in x 12 in, Ductile Iron, EPDM Seal, 300 psi @ 150° F (MPN 0390013597). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 300 psi @ 150° F; Fitting Pipe Size: 12 in x 12 in.
GRUVLOK
GRUVLOK Clamp Coupling: Clamp, 12 in x 12 in, Ductile Iron, EPDM Seal, 300 psi @ 150° F (MPN 0390013597). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 300 psi @ 150° F; Fitting Pipe Size: 12 in x 12 in.
GRUVLOK Couplings: 5 in x 5 in, EPDM Seal, 750 psi, Ductile Iron, Grooved x Grooved x Threaded (MPN 0390113082). Key specifications — Maximum Operating Pressure: 750 psi; Brand: GRUVLOK.
GRUVLOK
GRUVLOK Couplings: 5 in x 5 in, EPDM Seal, 750 psi, Ductile Iron, Grooved x Grooved x Threaded (MPN 0390113082). Key specifications — Maximum Operating Pressure: 750 psi; Brand: GRUVLOK.
GRUVLOK Clamp Coupling: Flex Bolted, 1 in x 1 in, Ductile Iron, EPDM Seal, 1,000 psi (MPN 0390004463). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 1,000 psi; Fitting Pipe Size: 1 in x 1 in.
GRUVLOK
GRUVLOK Clamp Coupling: Flex Bolted, 1 in x 1 in, Ductile Iron, EPDM Seal, 1,000 psi (MPN 0390004463). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 1,000 psi; Fitting Pipe Size: 1 in x 1 in.
GRUVLOK
GRUVLOK
GRUVLOK Rigid Coupling: Rigid Bolted Clamp, 4 in x 4 in, Ductile Iron, NBR Seal, 750 psi (MPN 390213260). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 750 psi; Fitting Pipe Size: 4 in x 4 in.
GRUVLOK
GRUVLOK
GRUVLOK Rigid Coupling: Rigid Bolted Clamp, 8 in x 8 in, Ductile Iron, NBR Seal, 600 psi (MPN 390213266). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 600 psi; Fitting Pipe Size: 8 in x 8 in.
GRUVLOK Clamp Coupling: Clamp, 3 in x 3 in, Ductile Iron, NBR Seal, 300 psi @ 150° F (MPN 0390013688). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 300 psi @ 150° F; Fitting Pipe Size: 3 in x 3 in.
GRUVLOK
GRUVLOK Clamp Coupling: Clamp, 3 in x 3 in, Ductile Iron, NBR Seal, 300 psi @ 150° F (MPN 0390013688). Key specifications — Brand: GRUVLOK; Maximum Operating Pressure: 300 psi @ 150° F; Fitting Pipe Size: 3 in x 3 in.