Is because of,rotate speed of centrifugal pump electric machinery is reduced He Yuan?

Shandong Hairui Zhonglian Pump Industry Co. , ltd. The centrifugal pump that is a major produces manufacturer. When type selecting of client centrifugal pump, manufacturer of my company water pump can provide the before-sales service such as price of centrifugal pump model, centrifugal pump, in order to offer client reference, and manufacturer of my water pump can provide the service of product of custom-built pump industry for the client. This product information is because of,reducing about rotate speed of centrifugal pump electric machinery is He Yuan knowledge:

Commonly used electric machinery has centrifugal pump two stage electric machinery and 4 stage electric machinery, rotate speed is fixed, of two class is 2900 turn, of 4 class is 1450 turn, but when be being used occasionally rotate speed however under normal rotate speed, what reason be so cause?
The element with factitious 1. . Because first wife electric machinery damages,have partial user, match on another electromotor to drive at will, the result created flow small, lift is low the consequence that does not sail upstream even.
The mechanical failure of itself of 2. centrifugal pump. Nut of close solid of impeller and pump shaft loosens or pump shaft is out of shape bend, cause impeller shift, grind with pump housing directly, or bearing attaint, reduce the rotate speed of centrifugal pump likely.
Maintenance of 3. motivation plane is ineffective. Electromotor breaks magnetism because of winding burn down, the change of method of means of v/LIT all over the ground number of the winding in maintenance, line, wiring, or the breakdown in maintenance did not eliminate an element to also can make water pump rotate speed is changed thoroughly.
Thank you to be mixed to the visit of above content very much read! This information is aboutCentrifugal pumpBecause of,electric machinery rotate speed is reduced is He Yuan introduce, if you still want to have farther knowledge to this problem, or want to buy this relevant product, contact personnel of my company customer service directly please, my company still produces fire pump, welcome you at any time seek advice.