A 180 - degree pneumatic actuator may leak
air for several reasons. Here are the common ones:
Worn - out seals: Seals in the actuator,
such as O - rings and diaphragms, can wear out over time due to frequent use,
friction, and exposure to air and contaminants. When seals are damaged or lose
their elasticity, air can escape through the gaps, resulting in leaks.
Loose connections: The fittings and
connections between the actuator and the air supply lines may become loose.
Vibration, improper installation, or thermal expansion and contraction can
cause the connections to work loose, allowing air to leak out.
Damaged hoses: Air supply hoses can develop
cracks, cuts, or punctures. These damages can be caused by physical abrasion,
exposure to harsh environments, or aging. If the hoses are compromised, air
will leak from the damaged areas.
Corrosion or damage to the actuator body:
Moisture - laden air or exposure to corrosive substances can cause corrosion on
the actuator body. Holes or weak spots may develop in the body due to
corrosion, leading to air leakage. Additionally, physical impacts or improper
handling can also damage the actuator body and create air - leakage paths.
Improper pressure regulation: If the air
pressure supplied to the actuator is too high, it can put excessive stress on
the seals and other components, causing them to fail and leak. Conversely, if
the pressure is too low, the actuator may not operate properly, and air may
leak as a result of insufficient force to keep the seals tight.
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