阀门的操作和使用（Valve operation and use）.docVIP

阀门的操作和使用（Valve operation and use） When the valve is installed after the operator can be familiar with the structure and performance of the valve and transmission device, correct identification of the valve opening direction, opening flag, indicating signal, and can skillfully and accurately operate the valve, deal with emergency fault timely and decisively. The valve operation is correct or not, directly affects the service life, and is related to the stability and safety of production equipment and devices. XV The manual operation of the valve The manual valve is to operate the valve by hand wheel, handle, is widely used in petrochemical equipment, operation personnel should pay attention to the following points: The opening direction of the valve, usually counterclockwise clockwise said valve open, said valve closed. Therefore, the switch valve should pay attention to the direction of The handle of the valve, the valve is based on the human hand * * small switch design. Therefore, as long as the manual rotary valve can realize the switch, are generally not allowed by a lever or wrench to switch valve. In order to prevent excessive force, damage to the sealing surface and other parts When the closed valve and stop valve to point to 1/4 to 1/2, rotary ring ring, to thread a better seal, so as not to be overdone, damaged valves I cant do with throttling valve and the closing valves, so easy to flush the valve plate and the sealing surface, and the introduction of vibration leakage, damage to the valve I open the steam valve, should be slow to open drain condensed water in the pipeline, to prevent water hammer. Damage to the valve and pipeline The large diameter of the valve, the cut-off valve and butterfly valve, some with bypass valve, and its role is to balance on both sides of the valve pressure reducing opening force. It is open, should open the bypass valve, then slowly open the valve, close the valve, the bypass valve should be closed, and then slowly close the