Specifications: 1) Design standards: API 608 2) Wall thickness: ASME B16.34 3) Inspection and test standards: API 6D, API598 4) Size: 1/2"-8" 5) Class: 150~600 lbs 6) Flange: ASME B16.5 7) Temperature: -29~+350oC 8) Body/bonnet: WCB, 304, 304L, 316, 316L 9) Seat: PTFE 10) Ball: WCB, 304, 304L, 316, 316L 11) Stem: WCB, 304, 304L, 316, 316L 12) Sealing: soft sealing or hard sealing, and metal-to-metal seat 13) Operation: manual, pneumatic, electric, hydraulic and pneumatic hydraulic 14) Appendix: fire safe, anti-static devices for ball-stem-body, blow-out proof stem, anti-error operation structure