闸阀：ASME B16.10, API 602, ASTM A182-F304, TRIM.15-HF, CL150, BB,OS&Y

ASME B16.10：Face-to-Face and End-to-End Dimensions of Valves（阀门结构长度）

API 602：Gate, Globe, and Check Valves for Sizes DN 100 (NPS 4) and Smaller for the Petroleum and Natural Gas lndustries

ASTM A182-F304：Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges,Forged Fittings, and Valves and Parts for High-Temperature

TRIM.15-HF：Hardfaced（内件，硬密封），详见 API 602

CL150：公称压力等级

BB,OS&Y：BB → Bolted bonnet（螺栓连接阀盖），OS&Y→ Outside Screw and Yoke 明杆支架式