Multi link stainless steelfilterWidely used in chemical, pharmaceutical, food, water treatment and other fields, its efficient filtration performance and corrosion resistance make it a core equipment for industrial fluid treatment. However, if there is a lack of scientific maintenance during long-term operation, it may lead to problems such as filter blockage, seal failure, and abnormal pressure, which can affect the service life and stability of the equipment. This article provides systematic guidelines from three aspects: daily maintenance, regular inspection, and troubleshooting.
1、 Daily maintenance: prevent problems before they happen
Filter cleaning and replacement
Cleaning cycle: Based on the properties of the medium, it is recommended to clean the filter screen at least once a month, and for high viscosity or particulate media, it should be shortened to 15 days.
Cleaning method:
Backwash: Close the inlet and outlet valves, open the drain valve, and use reverse water flow to flush the filter screen.
Chemical cleaning: For stubborn dirt, soak in weakly acidic or alkaline cleaning agents (such as 0.5% hydrochloric acid solution) for 1-2 hours and rinse.
Replacement standard: When the filter screen damage rate exceeds 10% or the pressure difference reaches 0.1MPa, it needs to be replaced.
Seal inspection
Inspect O-rings, gaskets, and other components weekly, and replace them immediately if aging, cracking, or deformation is found.
When replacing, it is necessary to use seals of the same material as the original factory (such as EPDM, NBR).
pressure monitoring
Record the readings of the import and export pressure gauges daily. If the pressure difference exceeds 0.15MPa, check for clogged filter screens or valve malfunctions.
2、 Regular Maintenance: Deep Maintenance and Performance Optimization
Filter life management
The lifespan of the filter element is generally 6-12 months and needs to be adjusted according to the actual pressure difference changes.
When replacing the filter element, it is necessary to synchronously check whether the support net is deformed to avoid the collapse of the filter element.
Valves and Control Systems
Check the flexibility of import and export valve switches every quarter, lubricate the valve stem, and tighten the bolts.
Electric actuators need to be calibrated every six months to ensure that the opening is consistent with the signal.
anti-corrosion treatment
In strong acid and alkali environments, it is necessary to apply a corrosion-resistant coating (such as fluorocarbon paint) to the outer surface of the filter every year.
It is recommended to use 316L stainless steel material or lined with PTFE coating for the internal contact medium.
3、 Fault handling: rapid response and precise repair
Filter clogged
Symptoms: Decreased flow and sudden increase in pressure difference.
Solution: Immediately shut down for backwashing. If ineffective, disassemble and clean or replace the filter screen.
Leakage issue
Symptoms: Media leakage, abnormal pressure gauge readings.
Solution:
Leakage at connection: tighten bolts or replace seals.
Filter element damage: Stop the machine and replace the filter element, and check if the support mesh is deformed.
Abnormal pressure
Symptom: Large fluctuations in import and export pressure.
Solution:
Check if the back pressure valve is stuck, clean or replace it.
Calibrate the pressure sensor to ensure accurate data.
4、 Special scenario maintenance suggestions
Extreme temperature environment
During winter, it is necessary to drain the accumulated water in the equipment to prevent freezing and cracking; In summer, it is necessary to increase heat dissipation measures to avoid aging of seals caused by high temperatures.
High viscosity medium treatment
Choose a wide spacing filter (such as 80-100 mesh) and shorten the cleaning cycle to 7-10 days.
Maintenance shutdown
Before long-term shutdown, the filter element needs to be thoroughly cleaned and filled with anti-corrosion solution (such as 10% glycerol solution).
5、 List of maintenance tools and spare parts
Tools: filter cleaning brush, torque wrench, pressure gauge calibrator, endoscope.
Spare parts: filter screen, sealing ring, pressure sensor, electric actuator.
Conclusion
Multi link stainless steel filterThe stable operation depends on a scientific maintenance system. By daily cleaning, regular maintenance, and rapid fault response, the lifespan of equipment can be significantly extended and the risk of downtime can be reduced. It is recommended that users establish maintenance files to record each maintenance data, providing a basis for equipment lifecycle management.