FMZ type self-priming pump selection self-priming pump

Selection of FMZ self-priming pump

1. Strict procedures must be followed when purchasing water pumps.

When choosing a water pump, it is also necessary to verify it. Only with complete three certificates can we avoid purchasing obsolete and inferior products.
2. Choose self-priming pumps according to local conditions

3. Choose a water pump that exceeds the standard appropriately.

After determining the type of water pump, its economic performance should be considered, especially the selection of the pump's head, flow rate, and supporting power. It must be noted that the head indicated on the water pump label (total head) is different from the actual head at the time of use (actual head), as there will be some resistance loss when the water flows through the water supply pipe and near the pipeline. So, the actual head is generally 10% to 20% lower than the total head, and the water output is correspondingly reduced.
Therefore, in actual use, it can only be estimated based on 80% to 90% of the head and flow rate indicated on the label. The selection of the matching power for the water pump can be based on the power indicated on the label. In order to make the water pump start quickly and use safely, the power of the power machine can also be slightly higher than the required power of the water pump, generally about 10% higher; If there is already power, when selecting a water pump, you can choose a water pump that matches the power of the power machine.

Pump installation

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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.Selection of FMZ self-priming pump