In our lives, I believe that everyone is not unfamiliar with the check valve, perhaps because some factors are often seen by some people. The main function of the check valve is to prevent the medium in our pipeline from flowing backwards. Today we will introduce in detail the function of the check valve and the related knowledge about the classification of the check valve. 
Check valve function
1, the stop valve It is in accordance with the flow of the media itself, and then will automatically switch the valve, so you can effectively prevent the phenomenon of the media backflow valve, also known in life as check valve and check valve and back Pressure valve. It is a type inside the automatic door valve. Its main function is to prevent the reverse flow of the medium and to stop the pump and the drive motor from turning over. At the same time, the release of the container medium is also stopped, and the stop valve can also give the pressure therein to rise to the line given by the auxiliary device which has exceeded the system pressure.
2. If the check valve is installed in the pipeline installation, the function it performs will cause the stoppage of the medium flow. If the material selection is different, it can be used for many kinds of medium such as water and steam. Prevent the effects of flow. This main material is carbon steel, and low temperature steel and other types of metal material, its main feature is that the valve flap is closed quickly, the use of a longer period of time, more reliable performance. 
3, check valve water pump water supply equipment is the role is that high-pressure water on the pump impeller after the impact to stop, then the equipment due to some factor in the work, the pump suddenly appeared to stop working. The pressure in the pump is gone, and the high-pressure water connected to the outlet of the pump will flow in the pump again in the opposite direction. When the outlet of the pump is installed with a check valve, it will immediately close, so as to prevent high-pressure water from flowing into the pump again in the opposite direction . 
What are the classification of check valve
Swing check valve
There are many different types of check valves, and each of the different types of check valves is not the same in terms of features and functionality. Next is a look at swing check valves. Its valve disc is in the form of a disk, and then it is rotated around the axis of rotation of the valve seat channel. Since the channel in the valve is streamlined, the flow resistance is smaller than that of the lift check valve. It is suitable for large caliber occasions with low flow rate and infrequent flow changes, but it is not suitable for pulsating flow. Its sealing performance is not as good as lifting type. Swing type check valve is divided into single valve type, double valve type and more than half type. These three types are mainly divided according to the valve caliber. The purpose is to prevent the hydraulic impact from being reduced when the medium stops flowing or reverse flow.
2, disc check valve
Then, the disc type check valve is relatively simple in the design of the structure, in general it will be more suitable for installation in the level of the pipeline, and this type of disc check valve will be poor in the sealing performance, valve disc A check valve that rotates around the pin axis in the valve seat. 
3, pipeline check valve
Pipeline check valve itself has a relatively small form factor, so the weight is naturally lighter. This type of check valve is a new type of valve on the market, and the processing technology is good, which is the development direction of the check valve. One, but the fluid drag coefficient is slightly larger than the swing check valve.
The above related to the role of the check valve , and what the classification of the check valve related content is introduced here, I hope this will help everyone. If you still don't understand where you can pay attention to more news, if you want to learn more about this news, please continue to pay attention to our website.
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