球阀分阶段扭矩计算

• VBTO-阀门打开起始力矩（由关到开）VALVE BREAK TORQUE OPEN
• VRTO-阀门打开运行力矩（由关到开）VALVE RUN TORQUE OPEN
• VETO-阀门打开结束力矩（由关到开）VALVE END TORQUE OPEN
• VBTC-阀门关闭起始力矩（由开到关）VALVE BREAK TORQUE CLOSE
• VRTC-阀门关闭运行力矩（由开到关）VALVE RUN TORQUE CLOSE
• VETC-阀门关闭结束力矩（由开到关）VALVE END TORQUE CLOSE

T-公称压力下阀门扭矩

• VBTO=1T
• VRTO=0.4T
• VETO=0.6T
• VBTC=0.75T
• VRTC=0.4T
• VETC=0.8T