Daily Maintenance Guide for Slurry Pump

1、 Pre run inspection (daily or before each startup)
Tighten connecting components: Check if the pump body, inlet and outlet pipelines, foundation bolts, and coupling connecting bolts are loose to ensure reliable fastening. The concentricity of the coupling should meet the requirements.
Lubrication system inspection: Check the oil level in the bearing box, which should be within the range of the oil gauge mark. Observe whether the oil quality is emulsified, discolored, or contains metal shavings, and replace the deteriorated lubricating oil in a timely manner.
Sealing system inspection
Mechanical seal: Check for foreign objects on the sealing surface, confirm that the shaft seal water pipeline is unobstructed and the pressure is normal.
Packing seal: Adjust the tightness of the packing gland nut to ensure that there is a small amount of water droplets seeping out (in the form of droplets), which neither leaks nor heats up.
Turning: Manually turn the coupling 2-3 times, feeling it should be flexible, without any jamming or friction sound, and confirming that there are no abnormalities inside the pump.

2、 Continuous monitoring during operation
Parameter monitoring: closely observe the current (whether it exceeds the set value), outlet pressure (whether it is stable), flow rate (whether there is a sudden drop), and bearing temperature (usually ≤ 75 ℃). Any abnormalities need to be adjusted or stopped for troubleshooting in a timely manner.
Vibration and noise: The operation should be smooth and the noise should be uniform. If there is an increase in vibration or abnormal impact sound, it may be due to impeller wear and imbalance, bearing damage, or foreign objects inside the pump. The machine should be stopped immediately for inspection.

Leakage inspection: Check all connections and sealing parts. The leakage of mechanical seals should be minimal or free of water; The packing seal should have a small amount of dripping. If the leakage suddenly increases, it should be adjusted or planned to shut down for replacement.
Cooling/flushing system: Ensure continuous supply of shaft seal water and cooling water, and smooth water flow. It is strictly prohibited to operate without water, otherwise it will instantly damage the mechanical seal.

3、 Maintenance after shutdown (after each shutdown or regularly)
Rinse pump body: After conveying corrosive, easily crystallized or high concentration media, the pump chamber and pipelines must be rinsed with clean water or specialized cleaning solution to prevent residual corrosion or blockage of the flow channel.
Drain the accumulated liquid: Especially after shutting down in a cold environment, the liquid in the pump and pipeline should be drained to prevent freezing and cracking of the pump body and pipeline.

Regular inspection of vulnerable parts: Regularly inspect and replace worn parts such as impellers, liners, protective plates, bearings, sealing rings, etc. Do not wait until they are completely damaged before replacing, preventive replacement should be carried out.

Backup pump rotation: If a backup pump is configured, it should be switched and used regularly (such as once a month) to balance the wear and tear of each pump and extend the overall equipment life.

Summary:
The core of maintenance lies in "frequent inspection, early detection, and timely handling", which can solve small problems in their infancy and effectively avoid expensive downtime and major repair losses.