Moisture Management Tips for Rotary Stationary Air Compressors
Moisture is one of the most common (and costly) enemies of rotary stationary air compressors. If not controlled, water can damage internal components, contaminate products, and reduce system efficiency. The good news? With the right practices, you can keep moisture under control and protect your investment.
How Moisture Enters Your System
Ambient air naturally contains water vapor. When air is compressed, the vapor concentration increases, leading to condensation inside the compressor, storage tanks, and piping. This can cause corrosion, sludge formation, and lubrication problems.
Best Practices for Moisture Control
1. Use Proper Aftercoolers and Dryers
- Aftercoolers remove a large portion of moisture immediately after compression.
- Refrigerated or desiccant dryers further reduce water vapor before air reaches your tools or processes.
2. Install Automatic Drains
- Automatic drains on tanks, filters, and separators prevent moisture buildup.
- Routine checks ensure drains operate correctly and don’t get clogged.
3. Check and Maintain Separators
- Oil/water separators help keep moisture and oil from contaminating the discharge air.
- Replace separator elements as recommended to maintain effectiveness.
Protecting Downstream Equipment
Moisture that makes it past your air treatment equipment can damage pneumatic tools, cause rust in piping, and even ruin end products. Regular inspections and maintenance of all downstream filters and dryers are essential to avoid these issues.
Signs of Moisture Issues
- Visible water at drain points or in air lines.
- Rust or corrosion inside tanks and piping.
- Decreased efficiency or inconsistent air pressure.