The main function of a refrigerated air dryer is to remove most of the saturated water vapor from compressed air. However, if there is still a large amount of moisture in the pipeline after treatment by the refrigerated air dryer, it is necessary to check whether the dryer is malfunctioning, causing a decrease in cooling efficiency and affecting the water removal effect.
Reasons for poor water removal performance:
1. The bypass valve in the compressed air pipeline is not closed or not tightly closed.
Solution: This problem is relatively easy to solve; simply close or tighten the bypass valve.
2. Internal leakage in the pre-cooler heat exchanger of the refrigerated air dryer.
If the heat exchanger inside the refrigerated air dryer leaks, it will cause some of the compressed air to bypass the evaporator and exit directly from the dryer's outlet. This problem is basically impossible to fix; generally, a new machine needs to be replaced. Therefore, companies should perform regular maintenance to reduce the likelihood of encountering this problem.
3. Faulty drain valve.
Although the drain valve is only a small, easily damaged part of the refrigerated air dryer, it plays a very important role. The water removed by the refrigerated air dryer must be discharged through the drain valve. If the drain valve is blocked or damaged and cannot drain properly, the refrigerated air dryer will lose its water removal function, and the moisture in the compressed air will flow into the downstream pipelines.
Therefore, when the water removal effect is poor, the operation of the drain valve should be carefully checked. Routine maintenance of the refrigerated air dryer includes timely cleaning of the condenser and frequent checking of the drain valve's operation. If there is slight blockage, pour a small amount of cleaning agent into the drain valve, shake it up and down a few times to clean it. If the blockage is severe, the drain valve needs to be disassembled and cleaned, or it can be replaced directly.