Its PVC-head design minimizes internal space to eliminate areas where gas can accumulate. Ports slope upward to vent gas through the top of the pump and away from the diaphragm. A Teflon diaphragm isolates process chemicals from the pump's working parts, as well as the environment. A micrometer dial allows manual adjustment over a 10-to-1 turndown range. A Variable Oil By-pass stroke adjustment for improved valve performance is also standard.

Neptune Chemical Pump Co. Inc., Box 247, Lansdale, PA 19446, (215) 699-8700,