Test forward and reverse rotation of centrifugal pump motor
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The installation on-site is complete, but there are no water supply conditions available. The centrifugal pump motor has been tested for forward and reverse rotation; should the motor be moved aside to be tested separately? Once it is confirmed to be working fine, can the coupling then be connected to the pump head? Since there is no water flow, there is no liquid inside the pump; attempting to test it directly will cause the mechanical seal to grind dry. Is my understanding correct?
During the initial startup, testing the motor’s rotation direction was indeed as you said – the motor was tested separately! Once the conditions for testing are met, connect the bearings for testing.
Disconnect the coupling and test the motor individually to determine its forward and reverse rotation
It is also common for the impeller to fall off when the motor reverses direction
Today, the workers on site tried to start the motor without water supply, which caused the mechanical seal to smoke (the mechanical seal has two surfaces and requires flushing water, but no flushing water was supplied either)
Today, the workers on site tried to start the motor without supplying water, which caused the seal to smoke (the seal has two surfaces and requires flushing water, but no flushing water was supplied either). The workers then claimed that they were following the **specifications** by doing so.
Then the workers on site argued that they were operating in accordance with **the standards, and a trial run could be conducted.
Which specification states that mechanical seals can operate dry? \ud83d\ude05\ud83d\ude05
Disconnect the coupling and test the motor individually to determine its rotation direction. It is correct for the motor to operate without the pump, as this meets the standards.
Who says that according to the \"rules\" he has to take responsibility? As long as the equipment is damaged, someone has to be held accountable. Regulations and standards all stem from practice and from principles.
Will it stop right away when triggered once? Can they control it well within this time frame?