1) Standards: a) Design & Manufacture:API 6D,ASME B16.34 b) Face to Face Dimension.:API 6D c) End Connection:ASME B16.5, ASME B 16.25 d) Test and Inspection:ISO5208,API 6D 2) Sizes: 2" - 24" or DN50 - DN600 3) Pressure Rating: Class300 - Class1500 or PN40 - PN250 4) Material: WCB, LCB, WC6, WC9, C5, CF3, CF8M, CF3M, etc. 5) Operated by: Lever, Gear, Pneumatic, hydraulic and Electric actuator