1. To choose and buy Stainless Steel Self-priming pumps according to local conditions, the common stainless steel Self-priming pumps are divided into three types according to the principle of action.

A. gas-liquid mixing type self-priming pump working process: because of the special structure of self suction pump, the pump stops after the pump body has a certain amount of water, the pump starts up again due to the rotation of the impeller and the suction pipe of the air and water are mixed, and is discharged to the gas water separation chamber, gas overflow the gas water separation chamber at the upper part, the lower part of the water return to the suction line and the impeller, the remaining air mixture until the pump and the gas inhalation tube completely discharged, the self suction, and normal pumping.

B. water ring wheel type self-priming pump is the combination of water ring wheel and pump impeller in a shell, and the gas is discharged with the aid of water ring wheel to realize self absorption. When the pump is working normally, the water ring wheel and the pump impeller can be cut through the valve, and the liquid in the water ring wheel can be released.

The C. self-priming pump, composed of a centrifugal pump and a jet pump (or a hydraulic jet), relies on a spray device to cause vacuum pumping at the nozzle.

2, the water pump should be selected appropriately. After determining the type of the pump, the economic performance of the pump should be considered, and the selection of the pump's lift and flow and its supporting power should be paid attention to. It must be noted that the lifting head (total lift) marked on the sign of the pump is different from the actual water head during the operation, which is due to the resistance loss of the water passing through the water pipe and the pipeline. Therefore, the actual lift is generally 10% to 20% lower than the total lift, and the amount of water is reduced accordingly. Therefore, in practice, only by the sign note estimation of lift and flow from 80% to 90%, the choice of matching power pump, power can be indicated on the label, in order to make the pump start fast and safe use, the engine power can also be slightly larger than the pump power required, a high of about 10% is appropriate; if you already have power, to buy water, we can purchase power by power machine with matching pumps.

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