Several issues may arise during the maintenance and repair of air compressors when they are shut down. Here are some important steps to follow for proper shutdown procedures and safety measures.
1. Gradually close the unloading valve to allow the compressor to operate under no load conditions before shutting it off completely.
2. Disconnect the power supply to stop the motor. If it's a diesel-powered unit, ensure the engine is turned off and properly secured.
3. After each use, the pressure in the air tank will decrease slightly. Open the drain valve at the bottom of the cylinder to release any accumulated oil and water. For continuous operations, it’s recommended to drain every 8 hours to maintain clean compressed air quality.
4. An emergency shutdown should be initiated under the following circumstances:
(1) If the diesel engine's oil pressure or water temperature goes out of the acceptable range, or if there is unusual noise from the machine, stop immediately and inspect.
(2) If there are abnormal knocking sounds coming from the crankcase, cylinder, or valve chamber.
(3) If the automatic pressure control system or the safety valve fails, leading to overpressure in the air tank.
(4) If the exhaust or lubricant temperature exceeds the maximum allowable limit.
(5) If the motor overheats or draws more current than allowed, or if sparks appear on the electrical circuit.
5. After shutdown, perform routine maintenance such as cleaning and tightening all moving parts to ensure smooth operation and extend the equipment’s lifespan.
6. Never clean the air filter, cylinders, or other compressed air system components with gasoline or kerosene, as this can lead to fire or explosion. Avoid using combustion methods to remove oil from the pipelines.
7. When using diesel or gasoline to clean parts, smoking must be strictly prohibited. Ensure there is no open flame nearby. Properly dispose of used oil, rags, and cotton waste—do not litter them.
8. Regularly clean the air filter to keep it free and clear, which helps reduce energy consumption and improve performance.
9. If the air compressor is used for sandblasting or rust removal, keep it away from the work area and implement proper dust protection measures to prevent damage to the machine.
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