Specification: Concentric type flange to BS4504 PN10/ PN16 Face-to-face dimension to ISO 5752/ BS5155/ BS EN593/ API609 Lever / Worm gear operator. Pressure/ Temperature ratings: Working Pressure: 1.6Mpa Working Temperature: -20° C to 121° C Suitable Media: Water, Oil & Gas. Materials: Body: Cast Iron / Ductile Iron / Carbon Steel Disc: Ductile Iron / Aluminum Bronze / Stainless Steel 304 / Stainless Steel 316 / Carbon Steel Seat Ring: EPDM/ NBR / PTFE / Viton Shaft: Stainless Steel / Carbon Steel Taper Pins: Stainless Steel 316 Key: Carbon Steel O-ring: NBR Bushing: PTFE, Luberized Bronze.