Gruvlok
Gruvlok 390013548 Rigidlok Coupling 4in Iron 750 psi
Connects 4-inch Schedule 40 grooved pipe with a ductile iron coupling rated to 750 psi at 150 degrees Fahrenheit
- Rigid grooved joint for 4 in Schedule 40 pipe
- Ductile iron body rated to 750 psi at 150 °F
- Class 150 pressure class matches standard flanges
- Painted finish protects iron from corrosion
- Straight coupling design simplifies in-line installation
Gruvlok 4-inch Iron Rigidlok Coupling
This Gruvlok Rigidlok coupling joins 4-inch grooved pipe in straight runs. It is built from ductile iron with a painted finish and rated for Class 150 service on Schedule 40 pipe. The fitting suits mechanical piping installations that require a rigid, permanent joint.
750 psi pressure rating at 150 Degrees F
The coupling withstands a maximum operating pressure of 750 psi at 150 Degrees F. Its ductile iron construction handles the thermal and hydraulic loads of typical heating and cooling circuits without deformation. No moving parts or seals mean there is no wear-related noise or leakage path to monitor.
Painted finish and grooved ends simplify
The painted surface protects the iron during storage and handling on site. Grooved ends accept standard roll-groove or cut-groove pipe preparation, allowing fast assembly with common hand tools. No bundled lubricants, gaskets or software are included with this fitting.
Highlights
- Rigid grooved joint for 4 in Schedule 40 pipe
- Ductile iron body rated to 750 psi at 150 °F
- Class 150 pressure class matches standard flanges
- Painted finish protects iron from corrosion
- Straight coupling design simplifies in-line installation
Specifications
| Brand | GRUVLOK |
|---|
Questions about this item
How do I install the Gruvlok 390013548 Rigidlok coupling on Schedule 40 pipe, and what step is often missed?
The coupling fits 4-inch grooved pipe ends. The step often missed is applying the correct lubricant to the gasket and groove before tightening the bolts to the specified torque.
What maintenance or replacement will the Gruvlok 390013548 coupling need over time?
Inspect the gasket periodically for wear, cracking, or hardening. Replace the gasket if any damage is found or during scheduled system maintenance intervals.
What pressure limit appears first when the Gruvlok 390013548 coupling runs at 150 °F continuously?
The maximum operating pressure is 750 psi at 150 °F. This is the primary limit; do not exceed this pressure at this temperature.
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