Centrifugal pump in the water before starting reasons and methods

[Asia pump network] Centrifugal pump in the start, first of all to be filled with water to drain the air inside the pump casing. The working principle of the centrifugal pump shows that when the impeller rotates, the water is thrown to the outer edge of the impeller due to the centrifugal force, a vacuum is formed at the center of the impeller, and water is sucked in to form a continuous working process of the pump. Centrifugal pump to start before filling water causes and methods If the pump body is not full of water, but full of air, because the air density is much less than the density of water, the same speed in the impeller rotation, the centrifugal force generated by the air will be far Less than the centrifugal force of water. This will gather in the center of the impeller so that the impeller center can not form a sufficient vacuum, hindering the inhalation of water, affecting the formation of the pump continuous working process. Therefore, the centrifugal pump in the start, you must first full of water, drain the body of the air pump to maintain the normal operation of the pump. Centrifugal pump should be in the water pump and inlet before filling the water, otherwise the pump is unable to pumped work. Centrifugal pump does not start after the water is often due to the pump air is not discharged, the water is not filled due. Before starting the pump, the tank is filled with water and sealed. Pump starts, the pump water from the vacuum box, the water tank as the water level decreases causing the tank to form a certain vacuum, the water in the pool will be under the action of atmospheric pressure into the tank through the inlet pipe to form a water cycle, so that The pump started to operate normally. The water filling method has the following advantages: small hydraulic loss, high pumping station efficiency, low labor intensity of technicians, simple start-up, and beneficial realization of automatic control of a water pump unit. There are two main methods of water filling before starting: one is to use the bottom valve to fill the water, the bottom valve is a one-way valve installed in the inlet of the inlet pipe. The disadvantage of this method is that the loss of the bottom valve head is large, affecting Pump efficiency of the device; the other is a bottomless valve water, the biggest advantage of this method is energy saving, compared with the bottomed valve pumping station can save 10% to 15%. (Editor: Xiaoxia QQ:) Recommended reading: 2017 exhibition information

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