GB12220 General valve – marking

GB12221 Flanged ends metal valve – face-to-face dimensions

GB12222 Multi-turn valve – connection of driving device

GB12223 Part-turn valve – connection of driving device

GB12224 Steel valve – general requirements

GB12225 General valve – copper alloy casting ware technology requirements

GB12226 General valve – gray casting iron technology requirements

GB12227 General valve – ductile casting iron technology requirements

GB12228 General valve – carbon forging steel technology requirements

GB12229 General valve – carbon casting steel technology requirements

GB12230 General valve – a casting steel technology requirements

GB12232 General valve – flanged ends iron gate valve

GB12233 General valve – iron gate valve and lift check valve

GB12234 General valve – flanged and butt-welding ends copper gate valve

GB12235 General valve – flanged steel stop and lift check valve

GB12236 General valve – steel swing check valve

GB12237 General valve – flanged and butt-welding ends steel ball valve

GB12238 General valve – flanged and wafer ends butterfly valve

GB12239 General valve – diaphragm valve

GB12240 General valve – iron plug valve

GB12241 Safety valve – general requirements

GB12242 Safety valve – characteristic testing solution

GB12243 Direct spring loaded safety valve

GB12244 Pressure reducing valve – general requirements

GB12245 Pressure reducing valve – characteristic testing solution

GB12246 Pilot operated pressure reducing valve

GB12247 Steam trap valve – classification

GB12248 Steam trap valve – technology terms

GB12249 Steam trap valve – marking

GB12250 Steam trap valve – face-to-face dimensions

GB12251 Steam trap valve – testing solution

GB/T13927       General valve – pressure testing

GB/T13932       General valve – iron swing check valve

GB/T15185       Iron and copper ball valve

GB/T15188.1   Valve face-to-face dimensions – butt-welding ends valve

GB/T15188.2   Valve face-to-face dimensions – wafer ends valve

GB/T15188.3   Valve face-to-face dimensions – female screw-down valve

GB/T15188.4   Valve face-to-face dimensions – male screw -down valve

GB-STANDARD-BALL-VALVE

GB-STANDARD-KNIFE-GATE-VALVE

GB-STANDARD-GLOBE-VALVE