Zero Air Loss Drains conserve compressed air energy by only expelling oil/water condensate from compressed air systems. As condensate collects in internal sump, a diaphragm is held closed by system pressure. When liquid level sensor detects an accumulation of condensate, an electromagnet is activated relieving system pressure above diaphragm. Drains are suitable for use on all filters and dryers. Units are capable of accepting power supplies of 24-230V. Parker Hannifin Corp./ Seal Group 14300 Alton Pkwy. Irvine, CA, 92618