We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

Image not available
GRUVLOKGrooved Pipe Couplings

GRUVLOK Rigid Coupling 3 in x 3 in Ductile Iron NBR Seal 750 psi

The GRUVLOK Rigid Coupling is a rigid bolted-clamp grooved pipe coupling, available in a 3 in x 3 in size. Constructed from ductile iron with an NBR seal, it is rated for a maximum operating pressure of 750 psi (MPN…

SKU 3G-OTH-468323

Brand
GRUVLOK
Item
Rigid Coupling 3 in x 3 in Ductile Iron NBR Seal 750 psi
Category
Grooved Pipe Couplings
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
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

Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

GRUVLOK
Manufacturer Part Number
390213458
Type
3 in x 3 in, Ductile Iron, NBR Seal, 750 psi
Fitting Pipe Size
3 in x 3 in
Maximum Operating Pressure
750 psi

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 Rigid Coupling is a rigid bolted-clamp grooved pipe coupling, available in a 3 in x 3 in size. Constructed from ductile iron with an NBR seal, it is rated for a maximum operating pressure of 750 psi (MPN 390213458).

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 that resists axial movement, making it suitable for high-pressure applications up to 750 psi.

What are the specifications of the GRUVLOK rigid coupling 390213458?

The GRUVLOK rigid coupling (MPN 390213458) is a 3 in x 3 in rigid bolted clamp made of ductile iron with an NBR seal. It has a maximum operating pressure of 750 psi and is designed for grooved pipe connections in demanding industrial environments.

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 pricing and lead time on the 3 in x 3 in model (MPN 390213458).

How to install a GRUVLOK rigid coupling?

To install a GRUVLOK rigid coupling, ensure pipe ends are clean and grooved per manufacturer specs. Place the gasket over the pipe ends, then position the coupling housing over the gasket. Insert bolts and tighten evenly to the recommended torque. Always follow the manufacturer's 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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from GRUVLOK

View all GRUVLOK parts
This grooved pipe coupling is used to join grooved-end pipes in mechanical piping systems. Constructed of ductile iron with an NBR seal, it provides a flexible, leak-tight connection rated for 300 psi at 150°F. Suitable for applications such as fire protection, HVAC, and industrial piping
GRUVLOK
This grooved pipe coupling is used to join grooved-end pipes in mechanical piping systems. Constructed of ductile iron with an NBR seal, it provides a flexible, leak-tight connection rated for 300 psi at 150°F. Suitable for applications such as fire protection, HVAC, and industrial piping
This rigid bolted grooved pipe coupling joins grooved-end pipe in fire protection, HVAC, and industrial piping systems. Constructed of ductile iron with an NBR seal, it provides a leak-tight, mechanically rigid connection rated to 300 psi for water, oil, and other non-corrosive fluids
GRUVLOK
This rigid bolted grooved pipe coupling joins grooved-end pipe in fire protection, HVAC, and industrial piping systems. Constructed of ductile iron with an NBR seal, it provides a leak-tight, mechanically rigid connection rated to 300 psi for water, oil, and other non-corrosive fluids
GRUVLOK
GRUVLOK
This rigid bolted clamp grooved pipe coupling is constructed of ductile iron with an NBR seal. It is sized 2-1/2 in x 2-1/2 in and rated for a maximum operating pressure of 750 psi. Used to join grooved-end pipe in fire protection, HVAC, and industrial piping systems for water, air, and light slurry applications
This grooved pipe coupling features a ductile iron body with an NBR seal, rated for a maximum operating pressure of 500 psi. It is designed for joining grooved-end pipes in industrial piping systems, including HVAC, fire protection, and process piping
GRUVLOK
This grooved pipe coupling features a ductile iron body with an NBR seal, rated for a maximum operating pressure of 500 psi. It is designed for joining grooved-end pipes in industrial piping systems, including HVAC, fire protection, and process piping
This grooved pipe coupling is designed for joining grooved-end pipes in industrial piping systems. It features a bolted ductile iron body with an NBR seal, rated for a maximum operating pressure of 500 psi. The coupling measures 7 1/8 inches in length
GRUVLOK
This grooved pipe coupling is designed for joining grooved-end pipes in industrial piping systems. It features a bolted ductile iron body with an NBR seal, rated for a maximum operating pressure of 500 psi. The coupling measures 7 1/8 inches in length
This grooved pipe coupling joins grooved-end pipes in fire protection, HVAC, and industrial piping systems. It features a ductile iron body with an EPDM seal, rated for 1,000 psi maximum operating pressure. Connection type is grooved x grooved x grooved
GRUVLOK
This grooved pipe coupling joins grooved-end pipes in fire protection, HVAC, and industrial piping systems. It features a ductile iron body with an EPDM seal, rated for 1,000 psi maximum operating pressure. Connection type is grooved x grooved x grooved
GRUVLOK
GRUVLOK
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 strong connection that resists axial movement
This grooved pipe coupling is used to join two sections of 6-inch grooved-end pipe. Constructed of ductile iron with an EPDM seal, it is rated for a maximum operating pressure of 300 psi at 150° F. Suitable for industrial piping systems requiring a rigid or flexible connection
GRUVLOK
This grooved pipe coupling is used to join two sections of 6-inch grooved-end pipe. Constructed of ductile iron with an EPDM seal, it is rated for a maximum operating pressure of 300 psi at 150° F. Suitable for industrial piping systems requiring a rigid or flexible connection