Air Locking
- An air lock is trapped air or dissolved gases inside the pump impeller.
- This air or gas is compressed and becomes high pressure as the pump runs.
Causes of Air Lock:- Leaks in the suction side
- Switch failure
- Entrained air mixed (dissolved) in the liquid
Dangers of air lock:- overheating
- pump inability to start
- reduced flow of liquid
- pump unable to move fluid
How to prevent air lock in pumps:- air relief valves
- repair leaks
- replace worn gaskets and seals
- operate within allowable limits
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