Gruvlok
Gruvlok Rigidlok Coupling 6 in Iron 750 psi
A ductile-iron rigid coupling for 6-inch Schedule 40 grooved pipe, rated 750 psi at 150 °F
- Rigid grooved joint handles 750 psi at 150 °F
- Ductile iron body resists corrosion in Schedule 40 systems
- Class 150 rating matches standard piping requirements
- Six-inch nominal size fits common industrial pipe runs
- Painted finish protects coupling during storage and installation
Gruvlok Rigidlok Coupling 6 in
The Gruvlok Rigidlok Coupling is a ductile iron grooved pipe fitting rated for 750 psi at 150 degrees F. It connects Schedule 40 pipe in straight runs using a painted Class 150 housing. This component suits mechanical piping installations that require a rigid, leak-tight joint without welding or threading.
Verify pipe schedule and groove profile before
Confirm that the existing pipe is Schedule 40 and prepared with standard cut-groove or roll-groove ends matching the 6 in nominal size. The coupling is designed for straight connections only and will not accommodate angular deflection or expansion. Ensure the system operating pressure and temperature stay within the 750 psi and 150 degrees F limits stated by the manufacturer.
Painted iron housing handles rated pressure
The ductile iron body and painted finish are engineered to contain the rated pressure at the specified temperature using the mechanical grip of the grooved joint. No active cooling, lubrication or external power is required for normal operation. Noise and thermal output are negligible because the coupling is a static sealing component with no moving parts.
Highlights
- Rigid grooved joint handles 750 psi at 150 °F
- Ductile iron body resists corrosion in Schedule 40 systems
- Class 150 rating matches standard piping requirements
- Six-inch nominal size fits common industrial pipe runs
- Painted finish protects coupling during storage and installation
Specifications
| Brand | GRUVLOK |
|---|
Questions about this item
Does the Gruvlok 0390013563 Rigidlok coupling come with gaskets and bolts, or do I need to order them separately?
The coupling is supplied as the ductile iron housing only; gaskets, nuts and bolts for the grooved joint must be purchased separately.
The listing shows Class 150 and Schedule 40 — which one tells me if this fits my 6 in steel pipe?
Schedule 40 confirms the coupling matches standard-weight 6 in steel pipe dimensions; Class 150 is the flange-pressure rating reference.
The tag says 750 psi @ 150 °F — will it still hold that pressure if my system runs hotter?
750 psi is the maximum at 150 °F; above that temperature the allowable working pressure drops according to the manufacturer’s derating curve.
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