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" - 32" or DN50 - DN800
3) Pressure Rating: Class300 - Class1500 or PN40 - PN250
4) Material: Carbon Steel, Stainless Steel, etc. 
5) Operated by: Lever, Gear, Pneumatic, hydraulic and Electric actuator