Submersible 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. Submersible pump work has the following characteristics:
1. Submersible pump pump at a certain speed under the head 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 with the flow and change.
2. Stable, continuous delivery, flow and pressure pulsation.
3. Generally no self suction capacity, the need to fill the pump before filling the liquid or the pipeline can be pumped into a vacuum to start working.
4. Submersible pump in the discharge pipeline valve closed down the state, the vortex pump and axial flow pump in the valve fully open state to start, to reduce the starting power.
Because the submersible pump is centrifugal force formed by the centrifugal force of the suction lift the water, so, when the submersible pump start, you must first close the gate, irrigation. The water level exceeds the impeller and the air in the submersible pump can be started. After the start, the impeller around the formation of a vacuum, the water suction, the valve can be automatically opened, the water lift. Therefore, we must first close the gate valve.
