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Four brass pressure relief valves with 1/4 inch NPT threads, gold finish, 150 PSI rating

4 Pcs 1/4" Male 150 PSI NPT Brass Pressure Relief Valve

SKU CH-G1QG-RB33A

Set of four 1/4" NPT brass relief valves rated to 150 PSI and 178 CFM for air compressor over-pressure protection

  • Four valves per pack simplify replacement and spare-part stock
  • Brass body resists corrosion and handles high-temperature fluids
  • Rated 150 PSI with 178 CFM flow for air, water or oil systems
  • Operates from -65 °F to +250 °F across demanding environments
  • 1/4 inch NPT threads with seal locks ensure leak-free installation

Brass Pressure Relief Valve Set

This pack contains four 1/4 inch NPT threaded brass valves rated at 150 PSI with a flow capacity of 178 cfm. They are designed to automatically vent excess pressure from air compressors and similar pneumatic systems.

Suits Compressors Needing Overpressure Protection

Builders maintaining shop compressors or pneumatic circuits that operate up to 250 degrees Fahrenheit will find these valves fit standard 1/4 inch ports. Systems requiring a different pressure setting, larger port size, or higher flow rating should use alternative components.

Sustained Operation at Rated Limits

The brass bodies resist corrosion and handle continuous cycling between the -65 degree and +250 degree Fahrenheit temperature range. Under constant load the valve opens at the preset 150 PSI threshold and reseals once pressure drops below the reset point, maintaining system stability without manual intervention.

Highlights

  • Four valves per pack simplify replacement and spare-part stock
  • Brass body resists corrosion and handles high-temperature fluids
  • Rated 150 PSI with 178 CFM flow for air, water or oil systems
  • Operates from -65 °F to +250 °F across demanding environments
  • 1/4 inch NPT threads with seal locks ensure leak-free installation

Specifications

BrandBonuci

Questions about this item

What thread size must my air compressor tank or piping have to accept these 1/4" NPT relief valves?

Each valve has a 1/4 inch male NPT thread, so the tank or piping needs a matching 1/4 inch female NPT port.

Will the 150 PSI, 178 cfm rating work with an older compressor that runs at lower pressure and flow?

The valve opens at 150 PSI and passes up to 178 cfm; it will stay closed at lower pressures and can handle lower flows without issue.

How can I confirm the valve is operating correctly after installation?

Pressurise the system; the valve should remain shut below 150 PSI, open and vent when pressure reaches 150 PSI, then reseat once pressure drops back below the set point.

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