自作用控制閥 (運行時無需額外動力). 氣動控制閥 范圍表 Pressure Reducing Valves Surplussing Valves Valve type Pilot operated Direct acting Compact direct acting Pneumatically actuated DP DRV BRV2 BRV7 SRV2 LRV2 SPIRA-TROL Steam Applications Gas Applications Liquid Applications Minimal Pipeline Space Minor Branch Lines Major Branch Lines Steam Distribution Accurate Control Options Variety of Control Options High Capacity Poor Media Conditions Technical literature Literature for these products is available below SeeControl Valv