This brass air compressor safety relief valve has a 1/4 inch male NPT thread and opens to release air when line pressure reaches its set value. It is sold in six pressure settings from 125PSI to 270PSI, so you can match it to the working pressure of a compressor tank or air line.
Features and benefits:
- Six pressure settings: 125PSI, 135PSI, 175PSI, 200PSI, 250PSI and 270PSI, listed as 0.85MPa, 1MPa, 1.2MPa, 1.4MPa, 1.5MPa and 1.7MPa by the seller
- Brass housing and fittings with a stainless steel spring, for a compact valve that suits air service
- 1/4 inch male NPT inlet with a red sealing element already on the thread
- Pull pin with a metal split ring, so the valve can be opened by hand to vent the tank
- Straight-through, single flow design that exhausts air only
- Small body, 4cm long and 1.3cm wide, which fits tight spots on tanks and manifolds
Applications:
- Overpressure protection on air compressor tanks and receivers
- Replacing a worn or seized relief valve on a workshop compressor
- Pressure relief on air lines, pumps and pneumatic equipment
- Spares stock for maintenance and machinery repair
In the box:
1 x air compressor safety relief valve in the chosen pressure setting.
Note: Always pick a valve rated at or just above the working pressure of the tank and below its maximum rating. Use it with air only, check the thread type before fitting, and test the pull pin regularly so the valve does not stick. The seller states appearance may vary slightly in size or colour.
Product type: Safety relief valve for air compressors. Thread: 1/4 inch male NPT. Pressure settings: 125PSI, 135PSI, 175PSI, 200PSI, 250PSI or 270PSI (choose in options). Pressure in MPa: 0.85, 1, 1.2, 1.4, 1.5 and 1.7MPa respectively (seller figures). Housing material: Brass. Spring: Stainless steel. Lined with: Copper alloy. Valve structure: Straight-through. Flow direction: Single flow. Function: Air exhaust. Driving power: Pneumatic. Applicable gas: Air. Pressure type: Normal. Temperature: Room temperature; suitable up to 250 degrees Fahrenheit (seller figure). Quoted flow: 58 SCFM (seller figure). Colour: Yellow brass with red thread seal. Length: 4cm (1.57in). Width: 1.3cm (0.51in). Connection: Male NPT thread, threaded end marked NPT. Thread seal: Red threaded sealing element on the male thread. Pull pin: Metal split ring attached to the pull pin. Design: Explosion-proof (seller description). Suited to: Electrical, machinery and civil construction use. Package contents: 1 x air compressor safety relief valve. Appearance: May vary slightly in size or colour from the pictures. Q: What does a safety relief valve do on an air compressor? A: It opens and lets air escape if the pressure in the tank or line rises to its set value, which helps stop the system going over pressure. This one has a 1/4 inch male NPT thread and is sold in settings from 125PSI to 270PSI.. Q: Which pressure setting should I choose for my compressor? A: Pick the setting that matches the working pressure of your tank or line and stays below the maximum rating of the tank. The options are 125, 135, 175, 200, 250 and 270PSI, so check your compressor data plate first.. Q: What thread does this pressure relief valve use? A: It has a 1/4 inch male NPT thread, and the threaded end is marked NPT. It has a red seal on the thread. Check your port is NPT before fitting, as BSP threads are not the same.. Q: What is the pull ring on the valve for? A: The metal split ring is attached to the pull pin. Pulling it opens the valve by hand so you can check it moves freely or vent the tank.. Q: Is this safety valve made of brass? A: Yes, the housing and fittings are brass, with a stainless steel spring inside and a copper alloy lining..