fluorine lining gate valve

How to operate a manual valve

by:Lianke Valve     2022-07-28
The manual valve is a valve operated by a handle and a handwheel, and is a commonly used valve on equipment pipelines. The rotation direction of its handle and handwheel is clockwise to close, and counterclockwise to open. However, there are also individual valves that are opened in the opposite direction to the above. Therefore, you should pay attention to checking the opening and closing signs before operation. The handwheel and handle on the valve are designed according to normal manpower. Therefore, it is stipulated in the use of the valve that the operator is not allowed to open or close the valve with the help of a lever and a long wrench. The handwheel and handle with a diameter (length) of 320mm allow two people to operate together, or allow one person to operate the valve with the help of an appropriate lever (generally no more than 0.5m long). Valves such as gate valves and globe valves should be turned 1/4 to 1/2 turn when they are closed or opened to the end (ie, bottom dead center or top dead center), so that the threads can be better sealed, which is beneficial to operation, so as to avoid over-tightening and damage. valve parts. Some operators are accustomed to using levers and long wrenches, thinking that the greater the closing force, the better, but this is not the case. This can lead to premature valve damage and even an accident.
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