The problem of how to deal with the blockage of the two-component screw valve can be solved by checking and cleaning the oil return valve, replacing the damaged O-ring, and regularly cleaning or replacing the three filters (oil filter, air filter and oil content). ‌

The problem of two-component screw valve blockage is usually caused by the blockage of the oil return valve, which may be due to the quality of the oil return valve itself or improper maintenance. In order to ensure the smooth removal of the blockage fault, it is important to carefully inspect the oil return valve and clean it in time. In addition, leakage of the compressor block shaft seal is also a common fault, which is usually caused by wear or damage to the O-ring. Repairing or replacing the damaged O-ring can effectively solve this problem.

The key to deal with this kind of failure is to accurately identify the fault point and supplement it with scientific and reasonable maintenance strategy. Prolonged operation or external foreign body intrusion may lead to differential pressure switch alarm, therefore, timely cleaning or replacement of the three filters and regular replacement of lubricating oil is the basis for maintaining the normal operation of the equipment. If the inspection confirms that the pipeline is not blocked but still shows that the oil filter is blocked, then check that the differential pressure switch beside the oil filter is working properly, because a faulty differential pressure switch can cause this false positive.