... , Frequency conversion motorProtection Degree: IP55Flow Control: Manual operation, Automatic(receive 4-20mA signal)Work ConditionEnvironment temperature: -30°C ... with wooden baseMeasurement: 40 x 33x52 cmGross Weight: 21.5 kgsMaterialPump head: SUS304, SUS316, PVC, PTEFDiaphragm: PTFEValve: SUS304 ... the length of stroke or the motor frequency.5.The diaghragm is made from multilayer complex structure ...