The automatic self-cleaning filter has the function of filtering the raw water and automatically cleaning and discharging the filter element, and the system has uninterrupted water supply when cleaning and discharging.

Self-cleaning filter is an important equipment for wastewater treatment, which can lay a solid foundation for engineering quality. But how to repair the automatic self-cleaning filter if it fails for a long time? What are the main aspects?

Fault 1: There is a water leakage problem

The water leakage problem generally occurs on the transmission shaft part of the filter (the leakage of the cylinder body and the flange welding part is not within this scope). There are basically two reasons for this problem, as follows:

1. The material or specification of the transmission shaft seal ring does not meet the requirements, so replace the seal ring that meets the requirements.

2. The second is that the sealing ring wears out after a long time of operation, causing the seal between the drive shaft and the filter body to be loose and water leakage occurs. In this case, replacing the sealing ring with the corresponding specification can solve the problem.

Fault 2: Automatic drain valve fault

The specific performance is that the sewage valve does not move during automatic cleaning or the sewage valve cannot be opened and cannot be closed.

1. If this kind of problem occurs, the domestic electromagnetic sewage valve is generally selected. This electromagnetic valve is a pilot type. First, the electromagnet opens the pilot hole, and then relies on the pressure of the water in the system to flush the diaphragm to open the valve.

2. Since the sewage contains a lot of impurities, it is very easy to block the pilot hole, causing the solenoid valve to not work or not to close tightly after opening.

3. The use of electric ball valves or hydraulic solenoid valves as sewage valves completely solves the problem that ordinary solenoid valves are prone to failure as self-cleaning filter automatic sewage valves.

Fault 3: Self-cleaning control system fault

Frequent start-ups will increase the amount of cleaning water and shorten the life of the filter.

1. This kind of problem is generally caused by the parameter setting of the filter not conforming to the working conditions.

2. This is mainly the problem of the cleaning pressure difference value and cleaning time interval set by the pressure difference controller. The filter cleaning system starts frequently and generally can solve the problem of the control system by setting a larger pressure difference value and time interval.

The automatic self-cleaning filter does not need to be maintained if there is no problem. In fact, the self-cleaning filter needs to be maintained and overhauled regularly. stable operation.