Single-unit commissioning plan for shielded pumps and magnetic drive pumps
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The individual testing plans for shielded pumps and magnetic drive pumps both require water testing. Magnetic pump can be tested in the same way as a regular centrifugal pump. First, disassemble the coupling and test the motor. After normal operation, conduct a joint test run. Solution: As preparation before testing, install a filter screen in front of the inlet, with a mesh size of around 100. During testing, it is necessary to monitor the pump’s operation by listening to its sound and checking the ammeter. If any abnormalities are detected, stop the pump for inspection, and make sure to clean the filter screen regularly. The main concern is clogging, which could lead to operation without any liquid. Before starting the pump, open the inlet valve and the outlet valve, as well as the exhaust pipe on the outlet pipeline, to allow water to enter the pump. Once fully inside, close the outlet valve. Manually turn the crank; once there are no abnormalities, press the start button. After starting, check the pressure gauge reading, open and adjust the outlet valve until the outlet pressure is normal. When stopping, first close the outlet valve, then press the stop button.
To prevent idling and dry running, it is recommended to install a pump-specific anti-idling protection device that shuts down the pump automatically within 2 seconds when idling occurs, thus protecting the pump from damage. The electronic sample can be found at: http://www.dnpump.com/PicUp/200910162202501.pdf. If you want to minimize maintenance efforts, it’s better to use such an anti-idling protection device – it saves time!