1、 Daily operation inspection and basic maintenance
1. Running status monitoring
Regularly monitor the operation sound of the pump body. If there is any abnormal noise or vibration, immediately stop the machine for inspection (which may be caused by loose components, wear, or foreign objects in the medium).
Record fluctuations in import and export pressure and flow rate, with abnormal values indicating diaphragm damage or seal failure.
Check the temperature of the pump body daily. If the temperature of the casing exceeds the ambient temperature of 35 ℃ or reaches 80 ℃, stop the machine for troubleshooting.
2. Key component maintenance
Diaphragm inspection: Check elasticity and integrity monthly, and replace immediately if cracks, perforations, or thinning exceed 10% are found; Avoid stress distortion during installation.
Sealing system: Check the sealing ring and interface sealing of the pump cover every week, test the concavity of the sealing surface with 0.02mm polyester film, and replace the sealing pressure ring if it exceeds the standard.
Valve maintenance: Clean the impurities in the inlet/outlet valve, conduct quarterly sealing tests on the one-way valve, and replace the worn valve core.
2、 Periodic deep maintenance
1. Lubrication management
Add 3-5 drops of high-grade lubricating grease to the pneumatic drive components every week to maintain a transparent oil film on the gear meshing surface.
The electric drive unit needs to replenish the motor bearing grease every six months (with a dosage of 1/3 of the bearing chamber).
2. Hydraulic oil and filtration system
Drive hydraulic oil should be replaced every 800 hours, using L-HM46 grade oil; Refueling should be done in two stages (first add 500ml of exhaust gas, and then add to full capacity).
Monthly cleaning of intake filter: After disassembly, use compressed air to blow in the opposite direction, and replace it forcibly when the light transmittance is below 70%.
Monthly cleaning of filter bags: Rinse with clean water and soak in neutral detergent. Do not use strong acid/alkali solvents. Install after drying.
3. Special maintenance for explosion-proof structures
Check the joint surface of the explosion-proof shell every quarter to ensure that there is no damage or corrosion, and that the bolts are tightened without looseness.
The electrical interface sealing ring should be replaced every six months to prevent the intrusion of explosive gases.
3、 Safe operation and long-term shutdown maintenance
1. Operating standards
Before starting, confirm that the air source pressure is greater than 1kg/cm ² (for pneumatic pumps) or that the power grounding is reliable (for electric pumps).
After transporting corrosive media, clean the sealing surface of the valve seat on the same day; The easily crystallized medium needs to be emptied of the membrane compartment fluid daily.
2. Stop maintenance
Drain the medium inside the pump to prevent residual corrosion or solidification.
After disassembly, dry off the moisture, apply anti rust grease to the moving parts, store in a dry and ventilated environment, and cover to prevent dust.
In cold regions, it is necessary to unscrew the drain plug to drain the liquid from the chamber to avoid freezing and cracking.
4、 Quick Response Guide for Malfunctions
1. Insufficient suction: Prioritize checking the integrity of the diaphragm and the sealing of the inlet and outlet valves.
2. Abnormal vibration: Disassemble and inspect for bearing wear or gear bite burrs.
3. Media leakage: Immediately stop the machine, replace the sealing ring or diaphragm, and use a helium mass spectrometer to detect the leakage rate (should be<1 × 10 ⁻⁶ Pa · m ³/s).
Maintenance points: Establish a dual signature maintenance ledger to record parameters such as temperature, vibration, and oil change intervals, and retain abnormal data for three years for future reference; Before operating in an explosion-proof environment, it is necessary to ventilate for 15 minutes and confirm safety with a gas detector.