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Start the self-priming pump, pay attention to the steering of the pump shaft is correct. Be aware of any abnormal sound and vibration when turning. Pay attention to the pressure gauge and vacuum gauge readings, after the start when the pressure gauge and vacuum gauge readings after a period of fluctuation indicating stability, indicating that the self-priming pump has been on the liquid, into the normal infusion operation. Self-priming pump into the normal infusion operation before self-absorption process, special attention should be paid to pump the water temperature rise, if this process is too long, the pump temperature is too high, then stop the pump to check the reason. If the self-priming pump liquid temperature is too high and cause self-absorption difficulties, you can temporarily shut down, the use of the discharge pipe back to the pump fluid back to the pump or the reservoir on the reservoir directly to the pump to replenish the liquid, so that the pump The liquid cooling, and then start. Self-priming pump in the course of work as a strong vibration and noise, there may be pump cavitation caused by cavitation have two reasons: First, the import pipe flow rate is too large, and second, the suction stroke is too high. When the flow rate is too large, the outlet control valve can be adjusted to increase the pressure gauge readings, which should be promptly removed when there is a blockage in the inlet pipe. When the suction stroke is too high, the installation height of the pump may be properly reduced. Self-priming pump in the course of work for some reason to stop the pump, need to start again, the outlet control valve should be slightly open (do not fully closed), so that both self-priming gas discharge from the spit, but also to ensure that the sharp tip Under the responsibility of starting. Pay attention to check the pipeline system for leakage. Self-priming pump parking precautions and operating sequence: 1, must first close the discharge valve on the pipeline. 2, stop the pump rotation. 3, in the cold season, should be stored in the body of the pump body and bearing body cooling water in the room to vent to prevent cracking parts.