Humidity Effects on Pneumatic Rotary Actuators
Understanding and mitigating moisture-related damage
Metal Corrosion Risks
Moisture infiltration: High humidity introduces water vapor that causes oxidation of iron-based components (housings, gears, shafts). Surface rust increases friction by 30-40% and leads to jamming or uneven rotation within 6-12 months of exposure.
Seal Degradation
Rubber component failure: Standard nitrile rubber seals absorb moisture, swelling up to 15% in volume. This causes air leakage (reducing efficiency by 25-35%) and eventual seal failure. Condensation also contaminates lubricants, decreasing viscosity by 50%.
Protective Solutions
Material upgrades: Stainless steel components reduce corrosion by 90%. Protective coatings: PTFE treatments extend seal life 3x. Moisture control: Integrated desiccant systems maintain optimal 30-50% RH levels.
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