The cooling and drying machine is Compressed air dewatering equipment. The principle of dewatering is very simple, that is, heat transfer between a high-temperature Compressed air and a low-temperature refrigerant is carried out in a heat exchanger, then high-temperature air in the process of cooling there will be liquid water crystal, this part of the water in the air pressure through the solenoid valve for discharge.

Here, we first want to talk about the composition and principle of the solenoid valve, solenoid valve has three parts, a coil, a digital pneumatic pressure gauge, and a valve body, the digital pneumatic pressure gauge is how long you can set up power, a power for how long, the valve body is controlled to open and close by the gain and loss of power of the coil. If the coil has been powered, or power can not be reset after the switch off, will cause a long exhaust phenomenon.

Therefore, there is no need to worry about the long exhaust. The first step is to check the digital pneumatic pressure gauge. The probability of this problem is very low. It is all set by the factory. If there is no problem with the setting, you can eliminate this point. The second step is to check the digital pneumatic pressure gauge, after eliminating the problem of the digital pneumatic pressure gauge, only the valve body is left, because it can not be the problem of the coil, if the coil is not electricity, it is impossible to exhaust, valve body disassembled to check, see if impurities are blocking the filter or spool if it is to clean up. If clean up or long exhaust, that is the solenoid valve quality is too poor, valve body problems need to replace the new solenoid valve.

In the final analysis, 99% of the reason is because of impurities blocked spool can not reset, some clean up the impurities, spool reset it, but some solenoid valve itself poor quality, it is easy to damage, it will not reset even after cleaning up the impurities.

For newly installed machines, especially newly installed gas storage tanks, the outlet valve of the gas storage tanks must be closed first, and the bottom drain of the gas storage tanks must be opened to drain the sewage and impurities first, and then the gas of the valves must be opened to enter the cold drying machine, in this way, the cold dry machine will not appear long exhaust phenomenon, the problem is mostly installation and commissioning personnel not professional, caused by improper operation, rarely because of the quality of accessories.

Above is the cold dry machine appears long exhaust phenomenon inspection method, if you need to buy digital pneumatic pressure gauge, welcome to contact us.