How Often to Change The Screw Compressor Lubricant Oil?

These are only calculated in the traditional standard environment. In the actual process of screw air compressors, many factors will affect the life and performance of the lubricating oil.

1. Lubricating oil quality: The quality of the lubricating oil will directly determine its life. As long as the qualified lubricating oil produced by the regular screw air compressor manufacturers, it will be replaced every 4000 hours under the standard environment. The replacement cycle of poor quality lubricating oil is very short. If you don’t know where to buy the right qualified lubricating oil, you can go to Crown Union Mall for reference.

2. Air humidity: The higher the humidity in the air, the more water enters into the VSD air compressor. The mixing of water and lubricating oil will lead to deterioration of the lubricating oil, affecting its service life; especially in humid areas or rainy season. Users should shorten the use of air compressor oil.

3. Impurities: including impurities from air entry and impurities from friction within the air compressor. Accelerate the deterioration of the oil, leading to equipment failure.

4. Acid and alkaline gases: If the screw air compressor operates in an environment containing a significant amount of acidic or alkaline gases, it can also affect the performance of the lubricating oil, thereby reducing its service life.
It is generally recommended to change it within 2000h, but it mainly depends on the operating environment of the compressor. Environmental factors must be considered.

Quick and convenient oil change steps：

Step 1: Start and run to normal temperature for 1 hour;
Step 2: Shut down the machine;
Step 3: Drain oil from tank, cooler and all filters;
Step 4: Add newly replaced oil to the minimum amount of oil required for operation (e.g. 1/2 volume);
Step 5: Start and run to normal operating temperature for 1 hour. During this hour, open and close the discharge valve every 15 minutes to cycle the machine at the maximum and minimum pressure valve settings;
Step 6: Shut down the machine;
Step 7: Drain oil from cooler, tank and all filters;
Step 8: Add freshly replaced oil to 1/2 volume;
Step 9: Start and run to normal operating temperature for 1 hour. During this hour, open and close the discharge valve every 15 minutes to cycle the machine at the maximum and minimum pressure valve settings;
Step 10: Shut down the machine;
Step 11: Drain the entire machine, including the cooler, tank and filter. If necessary, remove piping to remove lower oil. Clean the filter and replace the separator and all non-permanent oil filters. Check that the inlet filter is not covered with contaminated oil and replace as appropriate;
Step 12: Add the recommended oil change to the minimum amount of oil required for operation;
Step 13: Start and run to room temperature for 15 minutes;
Step 14: Shut down and drain the machine of oil. Open the air filter and screen, but do not replace them;
Step 15: Add the recommended oil to the machine to the normal oil level;
Step 16: Restart the machine and note the oil level. With the machine running, there is about 1/2 oil in the observation window;
Step 17: After 2 minutes of shutdown, the foam can be dispersed to the oil level and no oil is flowing out of the discharge valve.