Tips for operating self priming pump

When we operate the self-priming pump, we should not be too careless to prevent sudden problems such as failure Today for WFB pump to introduce the next few operating tips (1) preparation before start-up: ① check the lubricating grease in the bearing box If too much grease is added, it will be heated due to mixing If the lubricating oil is insufficient, it shall be supplemented ② check whether the anchor bolts and other fixed connections are loose and whether the motor grounding is good ③ disc the pump and check whether the pump shaft rotates flexibly and whether there is the sound of friction between parts ④ open the vent valve at the high point of the pump casing and suction pipeline, use the hydrostatic pressure of the suction tank level to flow automatically into the pump, or use the vacuum pump to lead the oil to fill the pump, and close the vent valve after confirming that there is no gas in the pump casing and suction pipeline Close the outlet valve of the pump and prepare to start (2) start the motor, slowly open the outlet valve of the pump after the pressure on the discharge pipeline is expressed to the rated value and stabilized, and adjust to the required working condition The idling time of WFB pump should not be too long, "in order to avoid the heat generated by dry friction of sealing ring, it is generally suitable to not exceed 1-2min (3) observe the vacuum gauge, pressure gauge and ammeter of the electrical system of the centrifugal pump at any time after it runs stably In case of any abnormality, judge the cause in time and take corresponding measures If not, stop WFB pump for further inspection At the same time, pay attention to the leakage of the shaft seal, monitor whether the operation is stable and whether there is abnormal sound (4) the operation steps of WFB pump switching are as follows: start the standby pump according to the starting method of the pump, slowly open the outlet valve of the standby pump, keep the two pumps running in parallel for a short time, slowly close the outlet valve of the first pump after the operation is stable, and then stop the pump During the switching operation of the pump, the opening or closing of the valve shall not be too fast to avoid water hammer (5) stop the WFB pump, slowly close the outlet valve, then cut off the power supply, and then close the inlet valve; when the pump body temperature drops to the room temperature, close the cooling water and sealing liquid valves; then make operation records.