How To Troubleshoot Your Air Compressor on Frequent Loading and Unloading (Ⅰ)

With the development of science and technology, air compressors, as an important power equipment, are widely used in many industrial fields such as machinery, metallurgy, building materials, electronic power, chemical industry, food, textile and so on.

However, in the long-term operation of the air compressor, it will inevitably encounter many failure problems, and frequent loading and unloading is one of them. Frequent actions not only shorten the life of equipment such as solenoid valve, unloading valve, but also seriously threaten the safe operation of the entire compressor system.

What are the reasons for the frequent loading and unloading of the air compressor?

Today Elang compressor will analyse the reasons and solutions to solve the frequently loading and unloading of screw air compressor.

1) Control

As we all know, the discharge pressure of the air compressor is the main basis for controlling the loading and unloading of the air compressor. If the difference between the two set values becomes smaller, it may lead to frequent loading and unloading of the compressor. When the loading pressure value of the compressor increases, the unloading pressure value decreases at the same time; or simply the loading pressure value increases and the unloading pressure value decreases, which will shorten the compressor loading and unloading cycle. The closer the value is, the more frequent the loading and unloading, and the greater the hidden danger of the safe operation of the compressor system. If you have doubt with the pressure settings of the screw air compressor, please do not hesitate to contact Elang compressor sales.

2) System reasons

If the set value of the compressor loading and unloading pressure is normal, it can be considered whether there is pipeline blockage between the compressor outlet and the air tank. If the pipeline is blocked but not completely blocked, the flow of compressed air will be severely blocked, and the air pressure between the blockage point and the compressor will be difficult to unload quickly during the loading of the compressor, resulting in the unloading pressure value reaching the unloading pressure value in a very short time. However, due to the limited air volume between the blockage point and the compressor outlet, coupled with system losses (such as filter drainage with air, air dryer regeneration) and a small amount of circulation to the air tank, the pressure quickly drops to the loading pressure value, the compressor reloaded again, and so on.

Specifically, there are the following factors to cause the frequent loading and unloading of screw air compressor:

1. The set value of the pressure difference between the loading and unloading in the controller is too small, which may lead to frequent loading and unloading of the compressor.
2. The pressure sampling tube is blocked or leaked, and the pressure decays too quickly.
3. The demand for compressed air during production is unstable, ranging from large to small or discontinuous.
4. When the compressor unit is unloaded, the minimum pressure valve is not closed in time or is not closed tightly.
5. The loading control solenoid valve is failure. The solenoid valve should be checked, it may be affected by oil, water and air, which may cause the action to be insensitive or the coil is burned out.
6. The pressure sensor that controls the start and stop of the compressor is failure or damaged.

When encountering the above problems, it should be solved in time, otherwise it will cause damage to related equipment and other failures. In next news, Elang compressor will analyse detailed solutions to solve above problems, please follow us Elang compressor for more trouble shooting of screw air compressor and protecting your screw air compressor system.