NEWS

Maintenance of wafer check valves is crucial to ensure stable operation, extend service life, and prevent system faults like water hammer and leakage. Based on its working principle and structural features, implement the following systematic maintenance:

1. Daily Inspection & Cleaning

① Visual Check: Regularly inspect valve body for rust, cracks, deformation and mechanical damage. Increase inspection frequency under high temp, high pressure or corrosive medium conditions to avoid structural damage.② Cleaning: Timely remove dust, oil and corrosive deposits on valve surface. For food, pharmaceutical and other hygienic scenarios, strictly follow standards for cleaning and disinfection to ensure no medium residue inside and compliance with hygiene norms.

2. Key Component Maintenance

① Disc & Valve Seat: Check disc opening/closing flexibility; inspect for jamming, wear or sealing surface scratches. For leakage due to poor sealing, lap the sealing surface or replace disc/seat seals to restore tightness.② Pins & Springs (Applicable Models): For swing wafer check valves, check pin wear and lubrication; replenish high-temperature grease timely if insufficient. For spring-assisted models, inspect spring fatigue/failure to ensure quick, stable disc closing and reduce water hammer.③ Bolt Fastening: Regularly check bolt tightness (wafer valves connect to pipeline flanges via bolts) to prevent leakage from vibration or thermal expansion. Retighten per specified torque if needed; use elastic washers for better stability.

3. Operation Status Monitoring

① Flow Direction Confirmation: Valve flow arrow must match medium direction (otherwise disc fails to open/close). For abnormal noise/vibration during operation, first check reverse installation or abnormal flow direction.② Water Hammer Prevention: Water hammer easily occurs during frequent system start/stop or parallel pump operation. Replace with slow-closing wafer check valves or install water hammer arresters to buffer impact and protect valves/pipelines.

4. Professional Maintenance Tips

① Regular Disassembly Inspection: Make disassembly plans based on medium corrosiveness and valve operation frequency. Conduct full disassembly inspection at least once a year under harsh conditions (e.g. chemical industry) to detect hidden faults.② Spare Part Replacement: PTFE, rubber seals and springs are wearing parts. Replace in advance per service life and operation times to avoid sudden leakage; reserve sufficient spare parts.

In summary, the above maintenance measures can significantly improve wafer check valve reliability, reduce system operation risks, and ensure stable, efficient operation of the entire pipeline system.