The selection data for self suction centrifugal pumps is the same as installation

Firstly, the selection data of self suction centrifugal oil pump

Firstly, the importance of basic data for self suction centrifugal oil pump selection

A key step before purchasing a self suction centrifugal oil pump is to have a clear understanding of the basic data for self suction centrifugal oil pump selection. Only after understanding the relevant basic data of self suction centrifugal oil pump can a self suction centrifugal oil pump product that meets the operating requirements be selected

2. Basic Data for Selection of Self suction Centrifugal Pump

1. Basic Data for Selection of Self suction Centrifugal Pump: First, understand the specific medium of the liquid being transported.

. The name of the main liquid, the main characteristics of the liquid (such as whether the liquid is corrosive, restorative, flammable and explosive, toxic, etc.), the specific temperature of the liquid, the proportion of particles and the specific particle diameter, the density of the medium, the viscosity of the medium, etc

2. Then determine the performance parameters of the self suction centrifugal oil pump.

. Firstly, it is necessary to understand the flow rate required by the user, and then it is necessary to understand the specific length and height of the pipeline of the self suction centrifugal pump, which is used in which region. It is convenient to refer to atmospheric pressure to calculate whether the suction head of the self suction centrifugal pump can meet the working conditions and the layout of the outlet system pipeline of the self suction centrifugal pump; What is the specific vertical height, horizontal distance in meters, pipe diameter, number of bends, number of valves, purpose of self suction centrifugal pump for pumping water out, and whether pressure is required at the end, etc., so that the manufacturer can choose a suitable head of self suction centrifugal pump product for you and understand the operation mode of the device (intermittent or continuous operation)

3. Other operating conditions that should be understood when selecting self suction centrifugal oil pumps.

. When selecting a self priming centrifugal oil pump, consideration should also be given to the limitations of the operating conditions, budget costs, installation location of the self priming centrifugal oil pump, (such as transporting flammable and explosive liquids or requiring a motor in the environment), and whether environmental pollution requires the self priming centrifugal oil pump to achieve leak free function. For example, a vertical leak free self priming centrifugal oil pump is required

Secondly, the installation of self suction centrifugal oil pump

1. When the self suction centrifugal oil pump is directly connected to the motor for transmission, attention should be paid to the coaxiality between the shaft of the self suction centrifugal oil pump and the output of the motor.

; The accuracy of the installation of a self priming centrifugal oil pump has a significant impact on its smooth operation and service life. Therefore, careful installation and calibration are necessary

2. Use nuts for the coupling of the self suction centrifugal oil pump and tighten the nuts to prevent loosening, otherwise it may cause impeller displacement and mechanical failure.

3. In order to maintain the storage liquid in the body, achieve better self suction ability and prevent dry friction of mechanical seals, the center line of the self suction centrifugal oil pump should be higher than the center line of the self suction centrifugal oil 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 lower 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 air leakage in the suction pipeline.

C. It is necessary to prevent solid and other debris from being sucked into the body of the self suction centrifugal oil pump. Therefore, a filter should be installed on the suction pipeline.

. The filtration area of the filter should be 2-3 times the cross-sectional area of the suction pipe, and the filter should be inspected regularly

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

5. When installing a self suction centrifugal oil pump, the static grounding resistance of the self suction centrifugal oil pump and pipeline should meet its specified requirements.

6. During installation, it is necessary to strictly inspect the self suction centrifugal oil pump housing and pipelines for debris such as stones and iron sand.

7. Correct the installation clearance and coaxiality of the self suction centrifugal oil pump coupling and the motor dynamic coupling, with a allowable deviation of 0.1mm for different axial degrees.

. The height difference between the self suction centrifugal oil pump shaft and the motor shaft can be adjusted by placing copper or iron sheets on the feet

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

9. The bearing body of the self suction centrifugal oil pump is equipped with a cooling water joint with a cooling chamber device for the use of 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 self suction centrifugal oil pump and cannot smoothly discharge gas during the self suction process, an exhaust pipe and valve should be added at the outlet of the self suction centrifugal oil pump.