What happens if a pump is run in reverse? Why can’t it be run in reverse?
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What happens if a pump is run in reverse? Why can’t it be run in reverse?
In the case of a centrifugal pump, this may cause the cap that fixes the pump impeller to the pump shaft to become loose, resulting in a loose fixation of the pump impeller. This can lead to friction or even collision between the pump impeller and the pump casing, thereby causing damage to the pump. If it is a gear pump, a small oil pump is no problem. Large pumps also have lock nuts at the pump shaft end; if rotated in the reverse direction, these nuts will become looser, preventing the pump from rotating.
You can give it a try; I don’t know why either
The fixing nut of the impeller has reverse threads; turning it in the opposite direction will cause the nut to loosen and damage the pump
This post was last edited by hxlhb on 2017-3-17 08:43. The main reasons are related to mechanical structure design: in some cases, the mechanical locking mechanism does not allow it; in other cases, the moving components prevent it; still in other cases, the actuator is not suitable; and there are also situations where the direction of operation is not permissible, etc. As for the consequences of reverse rotation, it depends on the specific structure of the pump; in some cases it may cause damage, in other cases it can lead to the destruction of the machine and injury or death, sometimes the pump simply won’t rotate, or it will run idle and do no useful work, etc.:D:lol
I agree with what was said above; there are different reasons why pump units cannot be reversed
During normal operation, the impeller lock nut tightens as it rotates; conversely, reversing its rotation may have certain adverse effects, so it is best to prevent such reversal.
It can cause the fixation of the pump impeller to become loose, which may lead to friction or even collision between the impeller and the pump casing, resulting in damage to the pump； It can even damage the motor.
The rotation direction of the impeller specialty component must be opposite to that of the locking nut; otherwise, the nut is prone to loosening or even falling off, which can cause pump failures or even accidents.