1) Standards: a) Design & Manufacture:API 608,API 6D,BS 5351,ASME B16.34 b) Face to Face Dimension.:API B16.10,API 6D,DIN 3202 c) End Connection:ASME B16.5, DIN2543-2550 d) Test and Inspection:ISO5208,API 6D,BS 6755 2) Sizes: 1/2" - 8" or DN12 - DN200 3) Pressure Rating: Class150 - Class900 or PN16 - PN160 4) Material: WCB, LCB, WC6, WC9, C5, CF3, CF8M, CF3M, etc. 5) Operated by: Lever, Gear, Pneumatic, hydraulic and Electric actuator