Specification: For BS4504 PN10/ PN16 Flange Mounting; Face-to-face Dimension to ISO 5752/ BS 5155; Lever/ Worm Gear Operator. Pressure/ Temperature ratings: Working Pressure: DN 40 – 600, PN 1.0Mpa / 1.6Mpa ( 150 / 200 Psi) DN 700 -1200, PN 1.0Mpa ( 150 Psi) Working Temperature: -20° C to 121° C Suitable Media: Water, Oil & Gas. Materials: Body: Cast Iron/ Ductile Iron/ Carbon Steel/ Aluminum Bronze/ Stainless Steel Disc: Ductile Iron/ Aluminum Bronze/ Stainless Steel 304/ Stainless Steel 316 / Carbon Steel Seat Ring: EPDM/ NBR/ PTFE/ Viton/ PTFE Shaft: Stainless Steel 316/ Carbon Steel Taper Pins: Stainless Steel 316 Key: Carbon Steel O-ring: NBR Bushing: PTFE ( DN50 ~ 600) , Luberized Bronze ( DN50~ 1200)