Stainless steel self priming pumps are divided into the following categories according to their working principles: 1. gas-liquid mixing (including internal mixing and external mixing), 2. water ring wheels, 3. jet flow (including liquid jet and gas jet). The gas-liquid mixing type self-priming pump working process: due to the special structure of stainless steel self sucking 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. The water ring wheel type stainless steel self-priming pump combines the water ring wheel and the pump impeller in a shell, and the gas is discharged with the aid of the 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 self-priming pump of the jet type stainless steel is composed of a centrifugal pump and a jet pump (or a jet), which relies on the ejector to cause vacuum pumping at the nozzle.

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