Questions about the exhaust operation of reciprocating diaphragm pumps?
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The unit is equipped with several reciprocating diaphragm pumps for transporting liquid ammonia and alkaline solutions. These pumps do not have exhaust lines designed for them, and in actual production, without performing exhaust operations, it is difficult for the pumps to reach their desired operating capacity. I wonder why the design doesn’t include a dedicated exhaust line?
A vent valve can be installed at the pump outlet
It is possible that the original design assumed that the diaphragm pump had a certain degree of self-priming capability and thus did not require venting; in reality, however, venting is still necessary, and the decision as to whether to use it or not should be based on the actual conditions
The volumetric pump outlet must remain open before startup; as long as the liquid level is above the pump body before starting, it’s fine