Manufacturing standards: API, ANSI, and DIN Materials: Body: cast iron, ductile iron, bronze / aluminum iron, SS304 Disc: cast iron, ductile iron, bronze, SS304 Seat: EPDM, PTFE, NBR, VITON Stem: carbon steel, stainless steel Valve Size range: from 1-1/4 inch to 64 inches (DN32mm - DN1600mm) Pressure: 150lbs, 300lbs, 600lbs Applicable tempt.: from -40 degrees C to 425 degrees C Valve Connection: flanged, wafer (lug type included) Applications: These products are mainly used for pipeline flow, pressure and temperature control of various industrial automation producing, for example electricity, petrifaction, metallurgy, environmental protection, energy management, fir-fighting systems. Simultaneously they have good fluid control properties, and can operate simply.