Min-pressure Valves

Your specialised source for minimum-pressure check valves designed specifically for screw compressors.

We supply high-quality valves installed at the outlet of the oil separator tank to maintain the minimum internal pressure required—typically between 4 and 4.5 bar—for effective lubrication of the air end during startup. They also prevent compressed air from flowing back from the air network into the compressor when the unit stops.

Key Features of Our Minimum-Pressure Valves

Lubrication System Protection During Startup: Rapidly builds internal tank pressure to circulate oil to the rotors and bearings immediately after startup, protecting them against premature wear.

Integrated Non-Return Function: Prevents compressed air from flowing backwards from the receiver tank or air network into the compressor during unload mode or shutdown.

Accurate, Calibrated Operation: Equipped with a precision spring and oil- and heat-resistant PTFE seals, ensuring accurate opening at the specified pressure.

Robust Engineering: Manufactured from reinforced aluminium alloys or high-quality brass to withstand demanding operating pressures and temperatures.

Easy Maintenance and Extensive Coverage: Internal repair kits can be replaced easily, while complete OEM-equivalent valves are available for leading brands, including VMC, Hoerbiger, Atlas Copco, Kaeser, and Ingersoll Rand.

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