Please ask an expert to help solve this

For a short period of time, it’s possible, such as for testing, forward and reverse operation, listening to the sound, etc.! ! ! ! It must not be used for a long time; please pay attention! ! ! ! :handshake :victory:

Sure, but it can’t be too long. Centrifugal pumps often run idle when being unloaded as well.

Never let the pump run idle for long periods of time; the presence of a return line in some centrifugal pumps is a specific example of a measure taken to prevent the pump from running idle.

The centrifugal pump is tested under no-load conditions. During no-load testing, the coupling bolts should be removed and the motor should be rotated a few times; it should move smoothly, without any signs of collision, scraping, or jamming, and there should be no abnormal noises. Check the motor direction; it should be the same as that of the pump, then install the coupling bolts. After the pump starts, check the motor: the bearing temperature must not exceed 70°C, and the stator temperature must not exceed 65°C. The vibration of the pump shall comply with relevant regulations. 　　The centrifugal pump is tested under load. Before starting the centrifugal pump under load, all coupling bolts should be tightened ； Start the lubricating oil and cooling water systems ； Open the pump inlet valve to fill the pump with liquid, close the pump outlet valve, and open the exhaust valve to remove all air ； The cranking should feel light and smooth.

It’s okay to run it occasionally, but not for long periods of time!

Under normal circumstances, there is no major problem with this, but the time must be short – it cannot be too long.

Sure, but it can’t be too long; it’s best to keep it under 30 seconds. :lol

Testing is fine, but it’s not good if done for a long time; some load should be applied