Why moisture must be controlled in a pneumatic system?

Why moisture must be controlled in a pneumatic system?

• A. Moisture can improve cooling.
• B. Moisture can freeze in lines at altitude, block flow, and cause corrosion.
• C. Moisture reduces weight.
• D. Moisture increases flow.

Answer: (B)

Moisture in a pneumatic system is dangerous because water in the air can condense and freeze inside the lines, especially at altitude where temperatures are low. Those ice plugs can block or restrict flow, causing actuators to stall or move unpredictably. Water also promotes corrosion of metal components and can degrade seals and lubricants, leading to leaks, sticking valves, and reduced reliability. By removing moisture with dryers, filters, and condensate drainage, the system stays clean, free of ice formation, and less prone to valve sticking or corrosion, ensuring consistent, safe operation.

Moisture in a pneumatic system is dangerous because water in the air can condense and freeze inside the lines, especially at altitude where temperatures are low. Those ice plugs can block or restrict flow, causing actuators to stall or move unpredictably. Water also promotes corrosion of metal components and can degrade seals and lubricants, leading to leaks, sticking valves, and reduced reliability. By removing moisture with dryers, filters, and condensate drainage, the system stays clean, free of ice formation, and less prone to valve sticking or corrosion, ensuring consistent, safe operation.