How to operate a manual valve
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Release Time：2017-12-20
Manual valve, is through the handle, hand wheel operation of the valve, is the equipment pipeline on the use of a common valve. Its handle and handwheel rotate clockwise to close and counterclockwise to open. However, there are also individual valves that open the opposite of the above. Therefore, before the operation should pay attention to check the opening and closing signs before operation. The handwheel and handle on the valve are designed according to normal manpower. Therefore, it is stipulated that the operator is not allowed to open or close the valve with the help of levers and long wrenches. If the diameter (length) of the handwheel and handle is less than 320mm, only individual operation is allowed. If the diameter of the handwheel is more than 320mm, two persons are allowed to operate together, or
Manual valve, is through the handle, hand wheel operation of the valve, is the equipment pipeline on the use of a common valve. Its handle and handwheel rotate clockwise to close and counterclockwise to open. However, there are also individual valves that open the opposite of the above. Therefore, before the operation should pay attention to check the opening and closing signs before operation.
The handwheel and handle on the valve are designed according to normal manpower. Therefore, it is stipulated that the operator is not allowed to open or close the valve with the help of levers and long wrenches. Handwheel, handle diameter (length)<320mm, only allow personal operation, diameter> 320mm handwheel, allow two people to operate together, or allow one person with the appropriate lever (generally not more than 0.5m long) to operate the valve. But the diaphragm valve, pinch valve, non-metallic valve is strictly prohibited to use the lever or long wrench operation, also does not allow too strong to close the valve.
Valves such as gate valves and globe valves, close or open to the head (I. e. bottom dead center or top dead center) to turn 1/4~1/2 turn, so that the thread is better close, beneficial operation, so as not to be too tight, damage the valve.
Some operators are used to using levers and long wrenches, thinking that the greater the closing force, the better, but it is not. This will cause premature valve damage, and even cause accidents.
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