We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
Image not available
GRUVLOKGrooved Pipe Couplings

GRUVLOK 2 1/2 in x 2 1/2 in Rigid Grooved Pipe Coupling

The GRUVLOK Rigid Coupling is a 2 1/2 in x 2 1/2 in grooved pipe clamp made of ductile iron with an NBR seal, bolted design, and a maximum operating pressure of 750 psi. 3G Electric interprets this demand and…

SKU 3G-OTH-460128

Brand
GRUVLOK
Item
2 1/2 in x 2 1/2 in Rigid Grooved Pipe Coupling
Part Number
390213656
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

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

GRUVLOK
Manufacturer Part Number
390213656
Type
2 1/2 in x 2 1/2 in, NBR Seal, 750 psi, Ductile Iron, Bolted
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 2 1/2 in x 2 1/2 in grooved pipe clamp made of ductile iron with an NBR seal, bolted design, and a maximum operating pressure of 750 psi. 3G Electric interprets this demand and delivers the genuine GRUVLOK part (MPN 390213656) across 14 industrial departments, with specialist depth in combustion, pumps and controls as an authorised distributor.

Frequently Asked Questions

What is the GRUVLOK Rigid Coupling used for?

The GRUVLOK Rigid Coupling (MPN 390213656) is used to join grooved-end pipe in fire protection, HVAC, and industrial piping systems. It provides a rigid, leak-proof connection rated for 750 psi, suitable for high-pressure water, oil, and chemical lines.

What are the specifications of the GRUVLOK Rigid Coupling?

This GRUVLOK coupling is a 2 1/2 in x 2 1/2 in bolted clamp made of ductile iron with an NBR seal. Maximum operating pressure is 750 psi. It is designed for grooved pipe and carries MPN 390213656.

Where to buy GRUVLOK Rigid Coupling worldwide?

3G Electric supplies the genuine GRUVLOK Rigid Coupling (MPN 390213656) worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this ductile iron, 750 psi grooved coupling.

How to install a GRUVLOK Rigid Coupling?

To install a GRUVLOK Rigid Coupling, ensure pipe ends are clean and grooved per manufacturer specs. Lubricate the NBR gasket, place it over the pipe ends, then position the ductile iron housing and tighten bolts evenly to the recommended torque. Do not exceed 750 psi.

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.
Not sure this is the right part? Photo-identify it

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 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
This grooved pipe coupling is used to join two 8-inch pipes in fire protection, HVAC, and process piping systems. It is made of ductile iron with an EPDM seal and rated for a maximum operating pressure of 300 psi at 150°F
GRUVLOK
This grooved pipe coupling is used to join two 8-inch pipes in fire protection, HVAC, and process piping systems. It is made of ductile iron with an EPDM seal and rated for a maximum operating pressure of 300 psi at 150°F
This grooved pipe coupling joins 10-inch grooved-end pipes in fire protection, HVAC, and industrial piping systems. The ductile iron body with EPDM seal provides a maximum operating pressure of 800 psi. The flex bolted design allows limited angular deflection to accommodate thermal expansion and vibration
GRUVLOK
This grooved pipe coupling joins 10-inch grooved-end pipes in fire protection, HVAC, and industrial piping systems. The ductile iron body with EPDM seal provides a maximum operating pressure of 800 psi. The flex bolted design allows limited angular deflection to accommodate thermal expansion and vibration
Grooved pipe coupling with ductile iron body and EPDM seal, rated for maximum operating pressure of 1,000 psi. Features grooved x grooved x grooved connections for joining grooved-end pipe in mechanical piping systems. Suitable for water, air, and moderate chemical service in commercial and industrial applications
GRUVLOK
Grooved pipe coupling with ductile iron body and EPDM seal, rated for maximum operating pressure of 1,000 psi. Features grooved x grooved x grooved connections for joining grooved-end pipe in mechanical piping systems. Suitable for water, air, and moderate chemical service in commercial and industrial applications
Grooved pipe coupling for joining grooved-end pipes in fire protection, HVAC, and process piping systems. Constructed of ductile iron with an EPDM seal, rated for 300 psi at 150°F. Suitable for rigid or flexible connections
GRUVLOK
Grooved pipe coupling for joining grooved-end pipes in fire protection, HVAC, and process piping systems. Constructed of ductile iron with an EPDM seal, rated for 300 psi at 150°F. Suitable for rigid or flexible connections
This grooved pipe coupling joins grooved-end pipes in industrial piping systems. It features a ductile iron body with an EPDM seal and a grooved x grooved x grooved connection. Rated for a maximum operating pressure of 800 psi
GRUVLOK
This grooved pipe coupling joins grooved-end pipes in industrial piping systems. It features a ductile iron body with an EPDM seal and a grooved x grooved x grooved connection. Rated for a maximum operating pressure of 800 psi
GRUVLOK
GRUVLOK
This rigid bolted-clamp grooved pipe coupling is constructed from ductile iron with an NBR seal. It is rated for a maximum operating pressure of 600 psi and is used to join grooved-end pipe in piping systems requiring a leak-tight, mechanically locked connection
This grooved pipe coupling joins grooved-end pipe in piping systems. It features a ductile iron housing with an EPDM seal and is rated for a maximum operating pressure of 300 psi at 150°F. The coupling provides a flexible, leak-tight connection for applications such as fire protection, HVAC, and industrial piping
GRUVLOK
This grooved pipe coupling joins grooved-end pipe in piping systems. It features a ductile iron housing with an EPDM seal and is rated for a maximum operating pressure of 300 psi at 150°F. The coupling provides a flexible, leak-tight connection for applications such as fire protection, HVAC, and industrial piping

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first