1. How to switch between manual and electric valves

將手動電動連鎖機構切換到手動側，用手輪來操作電動閥門。在開、關過程中，操作應靈活輕便、無卡澀現象，同時還應檢查開、關方向與電動裝置是否一致， 開度指示器顯示的數值應與手輪方向一致且同步。經過幾次反復檢查和調整之后，確認無誤就可以將其放置在開啟、關閉的中間位置，以便于電動操作。

Switch the manual electric interlock mechanism to the manual side, and use the hand wheel to operate the electric valve. In the process of opening and closing, the operation shall be flexible and light without jamming. At the same time, check whether the opening and closing directions are consistent with the electric device. The value displayed by the opening indicator shall be consistent with and synchronized with the direction of the handwheel. After repeated inspection and adjustment for several times, it can be placed in the middle of the opening and closing position to facilitate electric operation.

2、電動閥門為什么要有切換手柄

2. Why do electric valves have switching handles

手輪直接裝在執行機構上故障率比較高。通電時電動執行機構在轉動，手輪也在轉動，這是多危險的事情。增加離合器就是為了保障操作的安全性，方便客戶進行手自動切換操作。離合器也有助于與手輪連接部位的齒輪與內側蝸桿齒輪的磨損程度。

The failure rate is high when the hand wheel is directly installed on the actuator. When the power is on, the electric actuator is rotating, and the hand wheel is also rotating. This is a dangerous thing. The clutch is added to ensure the safety of operation and facilitate the manual and automatic switching operation of customers. The clutch also contributes to the degree of wear of the gear at the connection with the handwheel and the inner worm gear.

3、電動閥門的執行器無法切換手動操作

3. Actuator of electric valve cannot be switched to manual operation

無法切換手動操作在設備正常運行時不會對系統產生影響，但是當電動操作出現故障或者設備檢修時，該故障就會產生較大的影響，導致工作人員無法通過手動操作判斷故障，或者是無法準確定位電動閥門的開關位。其產生的原因主要是切換機構離合器齒輪或者銷軸損壞。

The failure to switch the manual operation will not affect the system during the normal operation of the equipment. However, when the electric operation fails or the equipment is overhauled, the fault will have a great impact, resulting in the staff unable to judge the fault through the manual operation, or unable to accurately determine the on-off position of the electric valve. The main reason is that the clutch gear or pin shaft of the switching mechanism is damaged.

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