1. What are the precautions for testing a screw pump?
Thread Content
Before testing, it is necessary to check whether the quality of the maintenance work meets the quality standards, and whether the records are complete and accurate； The cranking is smooth and effortless, with no sticking ； The packing gland is not skewed, and the leakage is within acceptable limits; the inlet valve is opened to allow self-pressurized filling of the pump and to empty it. When operating under load, the machine should run smoothly without any noise or vibration; the motor should not experience overcurrents. The flow rate and pressure of the medium should remain stable, meeting the specifications indicated on the nameplate or fulfilling the requirements of production. Sealing leaks should also be within acceptable limits.
The following points should be noted during testing: 1. Check and repair any quality issues with the pump to ensure it meets quality standards, and verify that the inspection records are complete and accurate. 2. Ensure that the pump screw is free and flexible, with no sticking. 3. The packing gland should be installed correctly, without any skew, and the leakage should be within acceptable limits. 4. Open the inlet valve to perform self-pressurized filling and emptying operations. 5. During operation, the pump’s rotation speed should be steady, without any noise or vibrations. 6. The current of the motor should be within the normal range and not exceed the rated value. 7. Check whether the medium flow rate and pressure are stable, and can meet the specifications stated on the pump’s nameplate or satisfy the production requirements. 8. Sealing leakage shall meet the requirements. .