Start, it is the principle of what we introduce below:
Centrifugal pump is a vane pump, depending on the rotation of the impeller in the spinning process, due to the interaction of blade and liquid, blade mechanical energy to the liquid, the liquid pressure can increase, to achieve the purpose of conveying liquids.
Centrifugal pump has the following characteristics:
Centrifugal pump at a certain speed generated by the lift has a limited value. The work flow and shaft power depends on the system connected with the pump condition (load, pressure difference and line loss). Head change with flow.
Stable operation, continuous conveying, no pulsation of flow and pressure.
Generally no self-priming capacity, the need to pump the first filled with liquid or pipeline into a vacuum to start work.
The centrifugal pump in the discharge pipe valve closed starting vortex pump and axial flow pump start in the valve fully open, in order to reduce the starting power.
Because centrifugal pump impeller centrifugal force is formed by the suction of the vacuum to lift the water, so, when the centrifugal pump start, you must first close the valve, irrigation. The water level exceeds the impeller position and the air in the centrifugal pump can be started. After starting, a vacuum is formed around the impeller, the water is sucked upwards, and the gate valve can be automatically opened. Therefore, the need to close the gate valve.
More centrifugal pump product knowledge: http://www.ahfybf.com/