... for the defrosting of wind cooling heat pump refrigeration unit and the defrosting of supermarket refrigerators as well.The adoption of ... upside of valve reduced, so the pressure difference between both side of diaphragm happen and lead to diaphragm lift to open the main ... 36V,110V,220V,380V.D.C.:12V,24V,110V,220VType and data ConnectionformModelConnectiondimension(in.)Kv value(m3/h)Opening diff. ...