Air compressor check valves are one-way or a non-passing valves. In other words, whatever is in the line that the check valve is installed in, can only flow through the check valve in one direction. The air compressor check valve can be a source of problems on an air compressor. If you wish to know more about the different types, how they work.. No. 7 Auto-Vent. Vertical mounting. 1/8" I.P. female connection. 75 lbs. pressure. 4 3/8" x 2 1/4". Copper finish with a polished brass cover. Spec Sheet Find A Distributor. Maid-O'-Mist® offers various models of air elimination valves, steam valves and float operated water level controls to meet your hydronic, steam, solar and water.

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Check valve (Non-return valve) Function: Air compressor check valves are one-way valves that allow the air to only move in one direction: from the compressor to the downstream system. Backflow, or flow in the reverse direction, can cause pressure fluctuations or damage the compressor.. By ensuring one-way flow, it prevents moisture from the air tank and debris from traveling back into the compressor pump, which could lead to corrosion, wear, or operational issues.. Table 1: Air compressor check valve issues, effects, and solutions. Issue: Cause: Effect: Solutions/Preventive measures: Sticking or seizing: