... 20# steel,SS420,SS304&316 Seat of valve : EPDM, wear-resistant EPDM,NBR,PTFE,Viton Handle of valve : iron, punching malleable iron, ... aluminum handle Normal Diameter of valve: DN40-600 Normal Pressure of electro valve: ... steel and special materials seal ring all kinds of rubber Characteristics of Product: 1.Small in size and light in ...