How to operate the valve correctly in the opening and closing direction of the valve

Valves are widely used in life and can be seen everywhere in our homes. Valves are needed wherever gas and liquid need to be controlled. There are many kinds of valves in life, such as heating valves and tap water valves. , and is divided into safety valves, check valves, globe valves, gate valves and butterfly valves. Whether the valve control is standardized or not will often affect our safety, so it is common sense for every consumer to know the opening and closing direction of the valve and learn to operate the valve correctly. Now Bian Xiao introduces the opening and closing directions of the valve and how to operate the valve correctly.

Opening and closing directions of valves

Under normal circumstances, all kinds of valves are closed clockwise and opened counterclockwise. Under special circumstances, there will be special marks. Switches are usually handle-shaped. If the handle is in the same direction as the valve, the valve is fully open. If there is a handwheel, turn it to the thumb of the right hand and vice versa. The handle opens along the pipeline, and the handle and the pipeline are closed at 90 degrees.

How to operate the valve correctly

1. Manual valve is the most widely used valve. Its handwheel or handle is designed according to ordinary manpower, considering the strength of sealing surface and necessary closing force. So you can't move the board with a long pole or a long board hand. Some people are used to using wrenches, so be careful not to use too much force, otherwise it is easy to damage the sealing surface or break the handwheel and handle.

2, open and close the valve, the force should be smooth, not impact. Some impact and opening and closing parts of high-pressure valves are considered, which is different from general valves.

3. Before opening the steam valve, it should be heated in advance and the condensed water should be removed. When opening the valve, it should be as slow as possible to avoid water hammer.

4. When the valve is fully opened, the handwheel should be rotated slightly in the opposite direction to tighten the thread to avoid looseness and damage. ? For valves that open the valve stem, remember the position of the valve stem when it is fully open and fully closed, so as to avoid hitting the top dead center when it is fully open. And it is convenient to check whether it is normal when it is fully closed. If the valve chamber falls off, or there are large sundries embedded between the valve core seals, the position of the valve stem will change when it is completely closed.

5. When the pipeline is used for the first time, there is a lot of dirt inside, so the valve can be slightly opened, washed away by the high-speed flow of the medium, then gently closed (not quickly closed or slammed to prevent residual impurities from clamping the sealing surface), then opened again, and so on for many times, and then put into normal work after the dirt is rinsed clean.

6. Always open the valve, there may be dirt on the sealing surface. When you close it, you should also wash it with the above method, and then formally lock it.

7. If the handwheel and handle are damaged or lost, they should be filled up immediately, and adjustable wrench should not be used to avoid damaging the square of the valve stem, which may lead to production accidents.

8, some media, the valve is closed and cooled, which makes the valve shrink. The operator should close it at an appropriate time, so that the sealing surface does not leave a seam, otherwise the medium will flow through the seam at high speed, which will easily erode the sealing surface.

9, operation, such as found that the operation is too fierce, should analyze the reasons. If the packaging is too tight, you can relax it properly. If the valve stem is skewed, notify the personnel to repair it. Some valves, in the closed state, the closed part expands when heated, making it difficult to open; If it must be opened at this time, loosen the valve cover thread for half a turn to one turn to relieve the stress of the valve stem, and then electroplate the handwheel.

As we know above, the valve closes clockwise and opens counterclockwise, which is the design principle of most switches. In life, screws are tightened clockwise and loosened counterclockwise, including the sealing principle of many vacuum tanks. There are too many examples in life, so we can remember the direction of the switch according to our own operating habits. When operating the valve, we should not only consider the direction, but also consider the specifications and strength of the operation in order to use it safely.

Tubatu Online provides you with "every decoration quotation, 1-4 local decoration companies, 3 sets of decoration design schemes" and the decoration pit avoidance strategy for free! Click this link:/Zhu Ye /zxbj-cszy.php? to8to _ from = SEO _ zhidao _ m _ jiare & amp； Wb, you can get it for free ~