Control valves are of different structure, it could be 2-way Globe control valve, cage control, 3 ways Globe control valve.
Body material: carbon steel, CF8M, WCB, CF8, Stainless Steel [SS316, SS304, SS316L, SS904L, CF8, CF8M, F304, F316, F31L, F51, F3, F55, F91], WCB, WC6, SS304, SS316, DUPLEX STEEL
Size: 1/2”- 48”.
Operations: Lever actuated ball valve, electric actuated ball valve, pneumatic actuated ball valve, gear actuated ball valve
Ends: Flanged, butt weld, socket weld, threaded
Here are different seat leakage classifications as mentioned by ANSI FCI 70-2. Mostly used are CLASS I, CLASS IV and CLASS VI.
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