手動(dòng)閥門，是通過(guò)手柄、手輪操作的閥門，是設(shè)備管道上使用普遍的一種閥門。它的手柄、手輪旋轉(zhuǎn)方向順時(shí)針為關(guān)閉，逆時(shí)針為開(kāi)啟。但也有個(gè)別閥門開(kāi)啟與上述開(kāi)啟相反。因此，操作前應(yīng)注意檢查啟閉標(biāo)志后再操作。

Manual valves are valves operated by handles and handwheels, and are commonly used in equipment pipelines. Its handle and handwheel rotate clockwise to close and counterclockwise to open. But there are also a few valves that open in the opposite direction to the above opening. Therefore, attention should be paid to checking the opening and closing signs before operation.

閥門上的手輪、手柄是按正常人力設(shè)計(jì)的，因此，在閥門使用上規(guī)定，不允許操作者借助杠桿和長(zhǎng)扳手開(kāi)啟或關(guān)閉閥門。手輪、手柄的直徑(長(zhǎng)度)<320mm的，只允許個(gè)人操作，直徑>320mm的手輪，允許兩人共同操作，或者允許一人借助適當(dāng)?shù)母軛U(一般不超過(guò)0.5m長(zhǎng))操作閥門。但隔膜閥、夾管閥、非金屬閥門是嚴(yán)禁使用杠桿或長(zhǎng)扳手操作的，也不允許過(guò)猛關(guān)閉閥門。

The handwheel and handle on the valve are designed for normal manual labor, therefore, it is stipulated that operators are not allowed to use levers and long wrenches to open or close the valve during use. For handwheels and handles with a diameter (length)<320mm, only individual operation is allowed. For handwheels with a diameter>320mm, two people are allowed to operate together, or one person is allowed to operate the valve with an appropriate lever (generally not exceeding 0.5m in length). However, diaphragm valves, pinch valves, and non-metallic valves are strictly prohibited from being operated with levers or long wrenches, and excessive force is not allowed to close the valve.

閘閥和截止閥之類的閥門，關(guān)閉或開(kāi)啟到頭(即下死點(diǎn)或上死點(diǎn))要回轉(zhuǎn)1/4～1/2圈，使螺紋更好密合，有利操作，以免?得過(guò)緊，損壞閥件。

Valves such as gate valves and globe valves, when closed or opened to the end (i.e. bottom dead center or top dead center), should be rotated 1/4 to 1/2 turn to make the threads better fit and facilitate operation, in order to avoid problems? Too tight, damaging the valve components.

有的操作人員習(xí)慣使用杠桿和長(zhǎng)扳手操作，認(rèn)為關(guān)閉力越大越好，其實(shí)不然。這樣會(huì)造成閥門過(guò)早損壞，甚至釀成事故。除撞擊

Some operators are accustomed to using levers and long wrenches to operate, thinking that the greater the closing force, the better. However, this is not the case. This can cause premature damage to the valve and even lead to accidents. Except for impact