Self-priming pump maintenance and troubleshooting of pump failure

Check the self-priming pump piping and joints for looseness. Turn the self-priming pump by hand or tool to see if it is flexible. Self-priming pump maintenance:

(1) Check the self-priming pump pipeline and joints for looseness. Turn the self-priming pump by hand or tool to see if it is flexible.
(2) Try to control the flow rate and head of the self-priming pump within the range indicated on the sign to ensure that the self-priming pump operates at the highest efficiency point to obtain the maximum energy saving effect.
(3) During the operation of the self-priming pump, the bearing temperature should not exceed the ambient temperature of 35C, and the maximum temperature should not exceed 80C.
(4) If the self-priming pump is found to have abnormal sound, stop immediately and check the cause.
(5) When the sewage pump is to be stopped, first close the gate valve, pressure gauge, and then stop the motor.
(6) When the self-priming sewage pump is not used for a long time and used in the cold winter season, when the machine is stopped, the lower part of the pump body should be unscrewed and the medium should be drained to prevent freezing cracks. (If it is sewage, please clean the pump chamber with clean water. )
(7) Carefully listen to the abnormal operation of the motor. Because the noise in the machine room during operation is high, you can use the auxiliary tools such as a screwdriver or a stick to attach the two ends of the motor. Not only can you find the bad vibration of the motor and its dragging device. Even the number of internal bearing oil can be judged and the corresponding measures such as adding bearing oil or replacing the new bearing can be made in time to avoid the motor bearing lacking oil dry grinding and blocking, turning the outer circle and broom burning.

Reasons and solutions for insufficient head lift of self-priming pump

1. Stainless steel "target=_blank> stainless steel self-priming pump when the corrosive liquid is used to transport the corrosive liquid, the impeller is severely corroded, the new impeller should be replaced, the performance of the pump can not meet the design requirements, and the pump should meet the design requirements. Current recovery speed 4, the clearance between the semi-open impeller and the pump cover is too large to reduce the clearance

Self-priming pump mechanical seal leaks seriously

1. Re-adjust the spring compression when the spring pressure is insufficient or change the spring 2, the dynamic change or the static ring end face corrosion, wear or scratch. To repair or replace the bad moving ring static ring 3. The fixing screw is loose, so that the spring is lost. Screw or re-adjustment spring 4, moving ring seal ring assembly oblique winding or corrosion deformation can reinstall or replace Boao pump with moving ring seal ring 5, static ring assembly skew to reload Boao pump static ring 6, bushing processing Insufficient precision and smoothness affect the axial movement of the moving ring. It is necessary to change the machining accuracy of the bushing 7. Impurity, foreign matter or medium crystallization affects the axial movement of the moving ring or the support between the end faces of the moving and stationary rings. Impurities, foreign bodies and crystals, thoroughly clean the sealing components.

Causes and solutions for overheating of self-priming pump motor

1. The scope of use (flow, lift) exceeds the design requirements of the pump. Select the appropriate motor according to the series type. 2. The specific gravity of the medium exceeds the configuration motor of the submersible sewage pump. Configure the appropriate Boss pump motor 3, the packing gland pressure is too tight or the mechanical seal spring is too tight. Re-adjust the spring compression of the gland or mechanical seal. 4. The self-priming pump has poor assembly quality and has friction. Or the motor and the pump shaft can be inconsistent to check the assembly quality and eliminate the assembly failure.

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China Hardware Business Network http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn