STCM series are centrifugal pumps with stainless steel body. the total delivery produced by the closed centrifugal impeller is sent only partly to the delivery opening. They are designed with particular attention to compact shape, lightweight structure and choice of materials, combining high performance with extremely quiet running. Pump Body: Stainless Steel A/S/304 Impeller: Stainless Steel/ Noryl Motor: Closed, externally ventilated Insulation Class: B and F Protection Class: IP44 or IP54 Mechanical Seal: Stainless steel/carbon-ceramic Shaft: Stainless Steel Thermal Protector (if required) The normal power standard is 220v 50hz single phase. Three phase 220/380v/50hz, 220/440v/60hz, single phase 230v,240v,127v, 110,115v/60hz models are available on request.