內(nèi)部和外部的泄露對安全構(gòu)成威脅。其它的自控制閥一般都是從閥桿上伸出，通過電空，液動驅(qū)動器來控制閥芯旋轉(zhuǎn)或移動。這需要處理長時間工作的閥桿動態(tài)密封件的外泄漏；力士樂電磁閥僅靠電磁力來密封磁斷路套筒上的內(nèi)鐵芯來實現(xiàn)，沒有動態(tài)密封、易堵塞泄漏。與其它類型的執(zhí)行機(jī)構(gòu)相比，它們的成本也較低并且易于安裝和維護(hù)。更顯而易見的事實是，自我管理體系總是如此簡單，并且總是如此廉價。力士樂電磁閥是用開關(guān)式信號來控制的，這樣就可以很容易的與工程計算機(jī)相連。

Internal and external leaks pose a threat to security. Other automatic control valves generally extend from the valve stem and control the rotation or movement of the valve core through electro pneumatic and hydraulic drivers. This needs to deal with the leakage of the dynamic seal of the valve stem working for a long time; Rexroth solenoid valve only relies on electromagnetic force to seal the inner iron core on the magnetic circuit breaker sleeve, which has no dynamic seal and is easy to block leakage. Compared with other types of actuators, they are also low cost and easy to install and maintain. The more obvious fact is that self-management systems are always so simple and always so cheap. Rexroth solenoid valve is controlled by switch signal, so it can be easily connected with engineering computer.