1. The manual valve is the most widely used valve, and its handwheel or handle is set according to ordinary manpower
The gauge takes into account the strength of the sealing surface and the necessary closing force. Therefore, long levers or long wrenches cannot be used
Come and move. Some people are accustomed to using wrenches, and should be strictly careful not to use too much force, too violently, otherwise it will be easy
Damage to the sealing surface or plate broken handwheel handle.
2. When opening the valve, the force should be stable and not impactful.
3. For the steam valve, it should be heated in advance and the condensate should be removed before opening, and the opening should be as slow as possible
Prevents water hammer.
4. When the valve is fully opened, the handwheel should be reversed a little to make the threads tighter to avoid loosening and damage. Right
In the open rod valve, remember the position of the valve stem when it is fully open and fully closed, so as to avoid hitting the upper dead center when it is fully open. combine
It is convenient to check whether it is normal when it is fully closed. If the valve falls off or a large debris is embedded between the valve core seals
When fully closed, the stem position will be changed.
5. When the pipeline is first used, there are more internal dirt, and the valve can be slightly opened and washed away by the high-speed flow of the medium
Walk and then gently close can not be fast-closed, slammed closed, in case of residual impurities pinching the sealing surface to open again
Repeat several times to rinse off the dirt before putting it back into normal work.
6. There may be dirt on the sealing surface of the normally open valve, and it should be washed dry by the above method when it is closed
The net is then officially closed.
7. If the handwheel and handle are damaged or lost, they should be completed immediately and cannot be replaced by a live wrench to avoid damage
The valve stem does not open and close in all directions, resulting in accidents in production.
8. Some media are cooled after the valve is closed, so that the valve shrinks, and the operator should revisit it at an appropriate time
Close it once so that the sealing surface does not leave a fine seam, otherwise the medium flows through the fine seam at high speed, and it is easy to erode the seal
Face.
9. If you find that the operation is too laborious, you should analyze the reason. If the filler is too tight, it can be appropriately relaxed, such as
If the valve stem is skewed, personnel should be notified to repair it. Some valves are caused by the expansion of the closing parts when they are closed
If opening is difficult, if it must be opened at this time, the bonnet thread can be loosened half to one turn to relieve stem stress
Then the board moves the wheels .
