1) Design and manufacture standards: a) Wafer and lug: API 609, Din3354 b) Flange and weld: BS5155 / EN5982) Inspection and test standards: API 598, DIN3230, BS51463) F-to-F: a) Wafer and lug: API609, Din3202 K2 b) Flange: ISO 57524) End flange dimension: ASME B16.55) Top flange: ISO52116) Connecting: wafer, lug, flange or weld7) Size: 1/2" to 72"8) Pressure: Class125 - Class300, PN6 - PN409) Temperature: -20C - 400C 10) Body: cast iron / ductile iron / WCB / 316 / 30411) Disc: ductile iron / WCB / 316/ CF8 / CF8M12) Stem: 13%Cr / 316 / 304 / SS17-4PH13) Seal: laminated metal seal, U-type metal seal14) Operation: lever, worm gear, pneumatic, electric, hydraulic or pneumatic-hydraulic actuator15) Property: longer service life and high temperature and pressure producing area:China payment:TT supplying capacity:ISO9001, CE , API 6D