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Why there are air compressor blow-off (auto drain) valves installed? May compressor be operated with those valves always closed/disabled?

02 Oct '19, 10:00

Oct. 2, 2019, 10 a.m.
KnowledgeBase's gravatar image


Blow-off (auto-drain) valves are important for the safe starting of the compressor. It is important that the compressor is started with the blow-off valves open to:

  • ensure that there is no water in the cylinders when the compressor starts. Possibly accumulated water will be blown away and thus, thus, the water hammering and subsequent damage to the compressor will be avoided
  • to unload compressor and reduce starting current of the driving electric motor.
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02 Oct '19, 10:07

Oct. 2, 2019, 10:07 a.m.
cheng's gravatar image

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