Installation method of self-priming sewage pump

Self-priming Sewage Pump Installation Method

1. During pump installation, the static grounding resistance of the pump and pipelines should meet the specified requirements.

2. During installation, the pump casing and pipelines should be strictly inspected for stones, iron filings, and other debris.

3. Correct the installation clearance and coaxiality of the pump coupling and motor coupling. The allowable deviation in coaxiality is 0.1mm. The height difference between the pump shaft and the motor shaft can be adjusted by shims of copper or iron on the base.

4. After the unit has been running for 3-4 hours, perform a post-installation inspection. If no problems are found, the installation is considered successful. The shaft should be checked during trial operation.

5. The cooling water connector for pump bearing housings equipped with cooling chambers is for use with rubber or plastic hoses with an inner diameter of 12mm and a thread size of M12x1.75.

6. If a check valve is installed on the pump's outlet pipe, and the pump cannot smoothly discharge gas during self-priming, an exhaust water pipe and valve should be added at the pump outlet.

7. When the pump and motor are directly coupled, pay attention to the coaxiality of the pump shaft and the motor output. Accurate pump installation significantly affects the pump's smooth operation and service life; therefore, careful and meticulous installation and calibration are essential.

8. The pump coupling must be securely tightened with nuts to prevent loosening, which could cause impeller movement and mechanical failure.

9. To maintain a certain level of liquid within the pump body for better self-priming capability and to prevent dry friction of the mechanical seal, the pump inlet must be higher than the centerline of the pump shaft.

10. The following should be noted when installing the suction pipe:

A. The installation height of the suction inlet should not exceed 5 meters. When conditions permit, the suction inlet should be installed as low as possible below the lowest water level in the tank, and the length of the suction pipe should be minimized, with fewer bends. This helps shorten the self-priming time and improve the self-priming function.

B. Valves and flanges in the suction pipe must be strictly protected against air or liquid leakage; no air leakage is allowed in the suction pipe. C. To prevent solid debris from being sucked into the pump body, a filter should be installed on the suction pipe. The effective water flow area of the filter should be 2-3 times the cross-section of the suction pipe, and the filter should be inspected regularly.

D. The suction and discharge pipes should have their own supports; the pump body itself should not bear the load of the pipes.