Theory:Reciprocating Pump Structure:Diaagm Pump Usage:Water Power:Electric Standard or Nonstandard:Standard Fuel:Other Pressure:Low Pressure Application:Metering Product Name:Automatic chemical liqune soleno pump Supply Voltage:220V 50 60hz or 110V 50 60hz Certificate:ISO 9001, ISO 14001 , OHSAS 18001, CE and so on