What will happen if the air compressor does not drain water?

Failure to drain water from air compressors will cause the following six major problems, ranked from high to low:

1. Oil and gas emulsification failure (high risk)

• phenomenon: Condensate water mixes with lubricating oil to form a white emulsion
• consequences：
  ◆ Lubricating effect drops by more than 60%, bearing/rotor is worn in direct contact
  ▲ Oil film failure causes high temperature of the main engine (measured cases show that the temperature can rise by more than 80℃)
  ③ Emulsified oil mud blocks the oil path, which may cause the whole machine to be scrapped within 1 month

2. Main engine corrosion penetration (irreversible damage)

• corrosion rate: Under condensation water immersion, the annual corrosion rate of ordinary carbon steel parts can reach 0.5-1mm
• typical cases: The air compressor of a food factory did not drain water for 3 years, and the rotor journal diameter shrank by 12%, and finally broke

3. The oil content of compressed air exceeds the standard

• data: For every 1L increase in water, the oil content of the compressed gas increases by 3-5ppm
• industry influence：
  ③ Products in the pharmaceutical/electronics industry may be scrapped due to excessive oil content
  ▲ The probability of fisheye/shrinkage cavity defects in the spraying industry has increased by 70%

4. Reduced system efficiency

• energy loss: Compressed air with water consumes an additional 7-15% of electricity
• gas attenuation: When water blocks the gas path, gas production can be reduced by 20-40%

5. safety hazards

• explosion risk: Emulsified oil may decompose at high temperatures to produce combustible gases
• electrical fault: Condensate water causes a short circuit in the control cabinet to increase by 5 times

6. environmental issues

• wastewater pollution: The COD value of oily wastewater can reach 5,000 – 10,000 mg/L, far exceeding the emission standard
• punishment cases: A company was fined 280,000 yuan for not treating air compressor wastewater

maintenance recommendations：

1. discharge cycle：
   • Normal environment: Drain water once a day before and after startup/shutdown
   • High humidity environment (RH>70%): Drain water every 4 hours
   • Low temperature operation: Additional drainage is required before loading (when the oil temperature is lower than 40℃)
2. technological upgrading：
   • Install zero-loss drainage valve to increase drainage by 40%
   • Install intelligent monitoring to detect water content in real time (accuracy up to ±0.1ppm)
3. emergency treatment：
   • Change lubricating oil + oil content immediately when found emulsification
   • Purge the main engine with dry air for 24 hours before starting it

special reminder: For oil-free air compressors, condensed water will directly cause the molecular sieve to fail, and adsorption dryers need to test the dew point every 300 hours. It is recommended that key users be equipped with a combination plan of double tower dryer + electronic drainage.