Body:Cast iron/Ductile iron Bolts:Stainless Steel Ball valve:Brass Cover:Cast iron/Ductile iron Spring:Stainless steel Stem:Stainless steel Nut:Stainless Steel Plate:Q235 Diaphragm:EPDM Needle valve:Brass Seat:Brass Gasket:NBR Flange end: EN1092-2, BS4504, DIN2532, ANSI B16, 10 Working pressure: PN10/16/25,125/150/250 PSI Size: DN50-DN800 (2''-32'')