Common Faults and Routine Maintenance of Self-Cleaning Filters

January 4, 2024 Self-cleaning Filter

1. Leakage Issue:
Leakage issues typically occur in the transmission shaft part of the filter. There are two main reasons for this problem. Firstly, improper use of the sealing ring on the transmission shaft, which can be resolved by replacing the sealing ring. Secondly, prolonged wear of the sealing ring can lead to damage, causing inadequate sealing between the transmission shaft and the filter body, resulting in water leakage. To address this, regularly inspect the wear of the sealing ring, replacing it when significantly worn.

2. Faults in Drain Valve:
Extended use of a self-cleaning filter may lead to faults in the automatic drain valve. Symptoms include the valve not moving during automatic cleaning or being unable to open or close properly. This issue is often associated with the use of domestically-produced solenoid valves as drain valves. These solenoid valves are pilot-operated, relying on the pressure of water in the system to open the valve. Due to impurities in wastewater, the pilot hole is prone to blockage, resulting in the solenoid valve being stuck or not closing properly.

3. Faults in the Automatic Cleaning Control System:
Frequent startups of the self-cleaning filter's cleaning system, leading to increased cleaning water consumption and reduced filter lifespan, are typically caused by malfunctions or incorrect parameter settings in the filter's control system. This can be related to the differential pressure controller's cleaning differential and cleaning time settings. Adjustments to the cleaning differential range or control system's cleaning time can resolve issues of excessively frequent cleaning.

Routine Maintenance Knowledge:

1. Filter Element Maintenance:
The filter element is a crucial component of the fully automatic self-cleaning filter, commonly made from stainless steel. After a period of use, impurities may accumulate on the filter element, affecting the filter's efficiency. It is essential to clean the impurities from the filter element promptly. Regularly check for any damage to the filter element and replace it if necessary.

2. Pressure Considerations:
Pay attention to the pressure of the fully automatic self-cleaning filter. A decrease in equipment pressure results in a gradual reduction in flow rate and decreased filtration efficiency. When faced with this situation, it is a reminder to clean and maintain the filter element. The cleaning process involves blowing away dust, soaking the filter element in clean water, gently scrubbing, and air-drying it in a ventilated area.

3. Limitations of Use:
The fully automatic self-cleaning filter is not suitable for water filtration with high solid content, volatile substances, ash content, microorganisms, toxic substances, plant nutrients, etc. It is essential to be aware of these limitations for effective and safe usage.