Industrial self-priming pump

1、 Product Introduction

Industrial self-priming pumps belong to self-priming centrifugal pumps, which have the advantages of compact structure, easy operation, stable operation, easy maintenance, high efficiency, long service life, and strong self-priming ability. There is no need to install a bottom valve in the pipeline. Before operation, it is only necessary to ensure that a certain amount of liquid is stored in the pump body. Different liquids can use self-priming pumps made of different materials.

2、 Product Features

1. Strong sewage discharge capacity: The special impeller anti blocking design ensures that the pump is unobstructed.

2. Energy saving: Adopting a hydraulic model, the efficiency is 3-5% higher than that of a typical self-priming pump.

3. Good self-priming performance: The self-priming height is 1 meter higher than that of a typical self-priming pump, and the self-priming time is shorter.

3、 Technical parameters

Flow rate: 5-800m3/h;

Head: 12-60m;

Motor power: 2.2-55KW;

Speed: 1450-2900r/min;

Caliber: 25-300;

Medium temperature: ≤ 100 ℃;

Self suction height: 4.5-6.0m.

4、 Product installation

1. When the pump and motor are directly connected for transmission, attention should be paid to the coaxiality of the pump shaft and the output of the motor; The accuracy of pump installation has a significant impact on the smooth operation and service life of the pump, so careful installation and calibration are necessary.

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

3. In order to maintain a certain amount of stored liquid in the pump body, achieve good self-priming capacity, and prevent dry friction of the mechanical seal, it is necessary to make the inlet of the pump higher than the centerline of the pump shaft.

4. Attention should be paid to the installation of the suction pipeline:

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 bends installed. This is beneficial for shortening the self-priming time and improving self-priming function.

B、 Valves, flanges, etc. in the suction pipeline should be strictly guarded against air leakage or liquid leakage, that is, no air leakage is allowed in the suction pipeline.

C、 Solid and other debris should be prevented from being sucked into the pump body, and a filter should be installed on the suction pipeline for this purpose. The effective water passage area of the filter should be 2-3 times the cross-sectional area of the suction pipe, and the filter should be checked regularly.

D、 The suction and discharge pipelines should have their own supports, 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 any debris such as stones or iron sand.

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

8. After 3-4 hours of actual operation of the unit, conduct an inspection. If there are no adverse phenomena, it is mainly due to proper installation. During the trial operation, the shaft should be checked.

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

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