How to adjust the position difference of the check valve?

How to adjust the position difference of the check valve?

Check Valve is an automatic valve whose main function is to prevent reverse or reverse flow of the medium. Check valves are typically used in pipeline systems to ensure that fluid can only flow in one direction. There are many types of check valves, such as spherical check valves, rotary check valves, piston check valves, etc. In some applications, it is necessary to adjust the position difference of the check valve. This article will introduce how to adjust the position difference of the check valve.

一、 Position difference of check valve

When the check valve is in operation, if the flow direction of the medium is opposite to the opening direction of the check valve, the check valve will automatically close, playing a role in preventing reverse flow. When the flow direction of the medium is the same as the opening direction of the check valve, the check valve will automatically open, allowing the medium to flow through and playing a role in unblocking the pipeline. When the check valve is in operation, if the medium flow rate is fast, there will be an in place difference phenomenon. When the flow direction of the medium is opposite, the closing pressure of the check valve is greater than the opening pressure of the check valve when the flow direction of the medium is the same. This in-place difference phenomenon will have an impact on the operation of the check valve.

二、 How to adjust the position difference of the check valve

1. Adjust the opening of the check valve

Adjusting the opening degree of the check valve can change the working performance of the check valve, thereby changing the difference in position of the check valve. In most cases, the opening degree of the check valve can be achieved by adjusting the preload of the elastic seat ring. Open the check valve and remove it. The seat ring fastened to the check valve is usually adjustable. By adjusting the tightness of the seat ring, the difference in position of the check valve can be adjusted. When the required difference is met, tighten the seat ring and reinstall the check valve.

2. Strengthen pipeline support

Strengthening pipeline support can reduce the vibration of the pipeline when the flow direction of the medium is opposite, thereby reducing the difference in the position of the check valve. In most cases, the vibration of pipelines is caused by external factors, such as wind force, earthquakes, and other natural disasters. Therefore, strengthening pipeline support is an effective method to avoid differences in the position of check valves when designing and constructing pipelines.

三、 Summary

Adjusting the difference in position of the check valve requires a comprehensive consideration of multiple factors. This can be achieved by adjusting the opening of the check valve, strengthening pipeline support, and other methods. In practical applications, it is necessary to choose appropriate methods based on specific situations and make adjustments and improvements in combination with actual situations. By adjusting the position difference of the check valve, the normal operation of the check valve can be ensured and the medium can flow smoothly in the pipeline.