The following situations significantly increase the likelihood of rusting in screw compressor heads:
1. Condensation water, formed from oil oxidation during prolonged periods of machine inactivity, flows back into the compressor head, causing rust.
2. During operation, if the fan temperature setting is too low, the oil temperature remains low, causing the oil to deteriorate and emulsify, leading to rust in the compressor head.
3. A mismatch between the exhaust volume and the air consumption, resulting in insufficient load time, causes water to condense in the compressor head, leading to rust.
4. Prolonged operation at low temperatures prevents the evaporation of moisture inside the machine, also leading to rust.
5. Failure to drain the water from the air receiver tank in a timely manner causes water to flow back into the main unit, resulting in rust.
Solutions:
1. Appropriately extend the compressor's unloading time (during no-load operation) to artificially raise the oil temperature to above 85°C (90°C is ideal).
2. For users with low air consumption, regularly drain the condensed water from the oil-gas separator tank after the screw compressor has been shut down for 6 hours, until a small amount of lubricating oil flows out. (The frequency of draining depends on the operating environment of the screw compressor.)
3. For users with very low air consumption, appropriately adjust the cooling fan's activation temperature.
4. Drain the water from the oil-gas separator tank once a week. Method: Before starting the machine in the morning, open the oil drain valve on the oil-gas separator tank until a small amount of lubricating oil flows out, then close the valve.