弹簧平衡型、气动膜片或活塞，执行机构对于开关阀是首选的。
Spring opposed , air operated diaphragm or piston, actuators are preferred for on-off applications.
采用新型VTDRY多弹簧执行机构，具有高度低、重量轻、安装维修简便等优点。
The model VTDRY multi spring actuator, has the advantages of low height, light weight, convenient installation advantages repair.
阀门泄漏量符合ANSIB16.104标准，调节阀配用不同的多弹簧执行机构，输出力大。
Valve leakage and conforms to the ANSIB16.104 standard, valve equipped with multi spring actuator different, large output force.
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