Check valve structure and characteristics, check valve manufacturers to explain to you

　Check valve manufacturers believe that ordinary check valves close fast, easy to produce water strike, resulting in a sudden rise in pressure, damage to pipes and equipment, loud noise. The micro slow closing check valve solves the problem caused by the quick closing of the ordinary check valve. Used in the direct water supply and drainage system of industrial and mining enterprises and high-rise buildings, it can reduce the occurrence of water hammer and water hammer, and achieve the effect of safe closure.

Check valve manufacturers

1. Structural characteristics of the micro-retarded check valve:

Install a valve in front of the valve and a valve behind the valve for easy maintenance. Install a filter in front of the valve to prevent impurities from the piping system from entering the check valve. Check valve manufacturers believe that the micro retarded check valve should be installed horizontally. If the valve is installed in the well, there should be some room for maintenance. The pipeline should be installed in accordance with the relevant specifications of automatic exhaust valve to continuous flow of water column.

2. The working principle of the micro-retarded check valve:

When the pump starts: the check valve manufacturer believes that the pressure at the valve entrance causes the valve disc to overcome the spring force to open rapidly, while the medium at the main valve entrance enters the diaphragm cavity through the needle valve and the check valve. Adjust the opening of the needle valve, so that the medium entering the upper cavity of the diaphragm acts on the diaphragm pressure plate, and produces a reaction force on the valve disc, and the valve disc slowly opens. Adjust the opening of the needle valve at the entrance of the main valve, control the opening speed of the valve, and the opening time of the main valve is greater than the starting time of the pump motor, so that the pump starts under light load and prevents the motor from starting too much current.

When the pump is closed: the check valve manufacturer believes that the pressure at the valve entrance suddenly decreases, and the valve disc will suddenly close under the pressure at the outlet, resulting in a sudden increase in the pressure at the valve outlet. At this time, water hammer phenomenon is easy to occur, causing damage to the pipeline and equipment behind the valve, and producing a lot of noise.

Check valve manufacturers believe that because the return system is installed at the outlet end of the valve, the medium behind the valve enters the upper chamber of the diaphragm through the ball valve, due to the check function of the check valve, the medium cannot enter the entrance end, and the lower chamber of the diaphragm is also filled with media. Although the pressure of the medium in the upper chamber causes the valve disc to close, the medium in the lower chamber cannot be quickly discharged under the throttling action of the small hole in the diaphragm seat, resulting in a buffering process, which prevents the closing speed of the valve disc, achieves the effect of slow closing and mute, and prevents the phenomenon of water hammer. By adjusting the opening of the ball valve, the closing speed of the valve disc (that is, the closing time of the valve) can be effectively controlled.

Check valve manufacturers believe that the micro slow closing check valve has the technical characteristics of slow opening and slow closing and eliminating water hammer, which realizes the light load starting of the pump and prevents the production of water hammer when the pump is stopped. After the pump motor is started, the valve will automatically open and close according to the pump operating procedure. A check valve is a valve that automatically opens and closes the disc by the flow of the medium itself and is used to prevent the backflow of the medium.

The check valve manufacturer believes that the check valve is an automatic valve, and its main function is to prevent the media from backflowing, prevent the pump and the drive motor from reversing, and release the media in the container. Check valves can also be used in pipes providing supply to auxiliary systems where the pressure may rise above the system pressure. Check valves can be divided into swing check valves (rotating according to the center of gravity) and lift check valves (moving along the axis).