Self-priming pump according to the principle of action is divided into the following categories: 1. Gas-liquid hybrid (including the internal mix and external mix); 2 water ring; 3 jet (including liquid jets and gas jets). Gas-liquid hybrid self-priming pump work process: Due to the special structure of the self-priming pump body, the pump stops, the pump body has a certain amount of water, the pump starts again after the impeller due to rotation, inhalation of air and water pipe Fully mixed, and was discharged to the gas-water separation chamber, the gas above the gas-water separation chamber overflows, the lower part of the water back to the impeller, and re-inhalation of the remaining air intake pipe until the pump and the suction pipe all the gas discharge, complete since Suction, and normal pumping. Water ring wheel self-priming pump is the water ring and pump impeller combination of a shell, with the water ring to the gas discharge, to achieve self-absorption. When the pump is working properly, the valve of the water ring and the pump impeller can be cut off by the valve, and the liquid in the water ring wheel can be released. Jet-type self-priming pump, the centrifugal pump and jet pump (or injector) combination of relying on the jet device, resulting in a vacuum nozzle to achieve suction. Self-priming pump installation and precautions: 1. First check everywhere bolt loose, the power cord and the plug is intact, the motor insulation resistance should be greater than 2 megohm. 2. In order to prevent electric shock accidents, it is necessary to install the corresponding safety measures such as earth leakage circuit breaker or electric shock safety device, and to conduct reliable grounding. 3. The working voltage of the pump should be used within 5% of the rated voltage, - 12%, otherwise the service life of the motor will be shortened or burned out. Stainless steel pump electric pump as far away from the power supply, the power transmission line should be appropriately bold, otherwise it will use the voltage drop and can not run. 4. Close the power switch, the pump idling about 2 minutes to see the start, the operation is normal, the steering is correct. 5. Fix the pump body with steel pipe or rubber tube (must not be too soft to avoid drawing flat). Connect the inlet and the bottom valve. The bottom valve must be placed perpendicular to the horizontal plane and 30cm above the water bottom to avoid sucking the sediment. 6. Clean water centrifugal pump use and automatic suction pump for the first time before the use of self-priming pump storage tank should be filled with water, electricity can not automatically after a few seconds out of water, the future does not require irrigation. 7. Self-priming clear water pump and self-priming clear water pump tube Before use for the first time, it is necessary to fill the water tank with water, power can not automatically after tens of seconds out of water, after use without irrigation. 8. Use, the motor should be kept dry, pay attention to the water level down, the bottom valve can not be exposed outside the water. When the temperature is below 4 â—‹ C. Antifreeze should be done, so as not to freeze the pump body. 9. If not for a period of time, should drain the net water pump (self-priming pump and automatic pump down water storage tank), the main components scrub clean, coated with anti-rust oil, placed in a ventilated and dry place for future use.
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