An air compressor check valve is a type of valves that is especially applied for the air compressors. An air compressor is a device that can be often seen in the industrial fields, which is used to compress the air, gas, or oil, etc. in order for offering kinetic energy for the related applications to use.
To provide kinetic energy to the industrial fields is not that the more media, the better. Instead, it is the sufficient amount of media that are compressed to the appropriate limit of pressure that make the media suitable for providing energy.
As far as we know, the air compressor plays the vital role in compressing the media, usually air, to the appropriate condition then sending to the applications. However, this device is meant to send the air out but not receive it back.
Therefore, there should be the air compressor check valves that are mounted on the air compressor, in order to control the pressurized air or other media to the most suitable source for the kinetic energy.
There are usually more than one air compressor check valves that are attached to the air compressor and the air receiver thank, which only allow the media to flow from on direction and block the other, so as to keep the media flowing through the right route and not flowing back.
Depending on the models or sizes of the air compressors, the air compressor check valves can be mounted either horizontally or vertically, and come in various sizes.
While on each one of the air compressor check valves, the construction of them is not much different from each other. Each of them consists of a body, a bonnet, a flow inlet,
two seat rings, a disc, a disc hinge, and a flow outlet.
The design of the body in an air compressor check valve usually follow the construction of the pipes that are supposed to be connected with the valve. Therefore, the flow inlet and outlet would be parallel to each other, and the opening between them would be the size of the pipes.
In addition to the flow inlet and outlet, all of the components are secured by the upper and lower body, and the body is covered by the bonnet in order to block the way that the media are not supposed to pass through.
The two seat rings and the disc of the air compressor check valves can be regarded as the a unit, as they usually work together. When the pressure come through the seat rings, they would be lifted up and further cause the disc to open.
Besides, the disc hinge is a device that fastens the disc on the upper side, and allow it to open when the pressure come through. Once the air compressor check valves are shut off, the disc hinge would allow the disc to be lowered down and close the opening of the valve.
The air compressor check valves are, in the general condition, mounted on two sites. One is inside the air compressors, and the other is between the air compressor and the air receiver tank.
The air compressors, no matter the reciprocating piston compressors, or the rotary screw compressors, would have an inlet as well as an outlet, and the first air compressor check valve would be integrated in the inlet of the compressors.
When the air compressor sucks the media from the inlet, the first air compressor check valve, and the large amount of media pushes the seat rings and the disc of the valve up in order to flow into the air compressor.
Once the media flow in the air compressor, the seat rings and the disc of the vlave would close, and the media would be stored inside the air compressor, since the valve only allows for one-way flowing of the media, and that’s how the first air compressor check valve works.
As for the second air compressor check valve, which is between the air compressor and the air receiver tank, is applied for preventing the media that have flown into the tank from going back to the air compressor.
As the same principle in that of the first air compressor check valve, once the media pass through the inlet of the valve, they would stay inside the air receiver tank, and have no way to flow back to the air compressor.
● the pressure of the given media is too low
The higher the pressure of the media, the more possible the disc is lifted up. In contrast, of the pressure of the given media is too low, the disc is hard to be lifted up, and thus the valve cannot work successfully.
● the valve is blocked with dirt or debris
When the valve is covered with dirt or debris, it may cause the components of the valve to malfunction, and thus lead to the leakage of the media as well.
Therefore, some of the manufacturers would set a filter inside the system, which collect the dirt and debris before they block the valve.
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