Method of installing self priming sewage pump

The first thing we need to do before using a self-priming sewage pump is to install it correctly. If the installation is not correct, then there is no correct use. Next, let's take a look at how to install the self priming pump correctly.

1. When directly connecting the pump and motor for transmission, attention should be paid to the coaxiality between the pump shaft and the motor output; The accuracy of pump installation has a significant impact on the smooth operation and service life of the pump, so it is necessary to carefully install and calibrate it.

2. The pump coupling must be securely fastened with nuts and locked to prevent loosening, otherwise it may cause impeller displacement and mechanical failure.

3. In order to maintain a certain amount of storage liquid in the pump body, achieve better self suction capacity, and prevent dry friction of mechanical seals, it is necessary to make the inlet of the pump higher than the centerline of the pump shaft.

4. The installation of the suction pipeline should pay attention to:

A. The installation height of the suction port should not exceed 5 meters. When conditions permit, the installation height of the suction port should be as low as possible below the water storage level of the pool, and the length of the suction pipe should be shortened as much as possible, with fewer elbows installed. This is beneficial for shortening the self suction time and improving the self suction function.

B. Valves, flanges, etc. in the suction pipeline should be strictly prevented from leaking air or liquid, that is, there should be no leakage in the suction pipeline.

C. To prevent solid and other debris from being sucked into the pump body, a filter should be installed on the suction pipeline. The effective drainage area of the filter should be 2-3 times the cross-sectional area of the suction pipe, and the filter should be regularly inspected.

D. The suction and discharge pipelines should have their own brackets, and the pump body itself is not allowed to bear the load of the pipelines.

5. When installing the pump, the static grounding resistance of the pump and pipeline should meet its specified requirements.

6. During installation, it is necessary to strictly inspect the pump casing and pipelines for debris such as stones and iron sand.

7. Correct the installation clearance and coaxiality of the pump coupling and motor dynamic coupling, with a allowable deviation of 0.1mm for different shaft degrees. The height difference between the pump shaft and the motor shaft can be adjusted by placing copper or iron sheets on the feet.

8. After 3-4 hours of actual operation of the unit, conduct a post inspection. If there are no defects, it is mainly because the installation has been completed, and the shaft should be checked during trial operation.

9. The bearing body of the pump is equipped with a cooling water joint with a cooling chamber device for fitting rubber or plastic pipes with an inner hole of 12, and its thread size is M12x1.75.

10. If a one-way valve is installed on the outlet pipeline of the pump and cannot smoothly discharge gas during the self suction process, an exhaust pipe and valve should be added at the outlet of the pump.