Centrifugal pump filling method
2023-01-06
The centrifugal pump is mainly filled with water in two ways: automatically and manually. Centrifugal pumps (except self-priming pumps) must be filled with water before starting the pump and the inlet pipe, otherwise the pump is unable to raise water to work. The centrifugal pump does not produce water after starting, often because the air in the pump is not drained and the water is not filled. There are two main methods of filling water before starting: one is to use the assembly of the bottom valve to fill 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 head loss of the bottom valve is large, affecting the efficiency of the pump installation; the other is no bottom valve filling water, the advantage of this method is energy saving, compared to the pump station with a bottom valve can save 10% to 15%. Below are several centrifugal pump filling methods for users to choose when running the pump.
Self-diversion water filling method For the use of semi-submerged pump house (i.e., the inlet pipe and the pump pump top elevation are below the water surface of the inlet pool pump station), water can be introduced into the pump by itself without artificial irrigation and diversion. The disadvantage of this pumping station is that it does not make full use of the pump's suction capacity, while the pump is installed at a lower elevation, which not only increases the amount of excavation of the foundation, but also the operation and management is more inconvenient; but the advantages are also more obvious, that is, it is easy to realize the automation of the pumping station, and the timeliness is stronger.
Artificial water filling method For small pumping stations with inlet pipe diameter less than 300mm, the inlet of the inlet pipe is usually equipped with a bottom valve, and generally more artificial water filling method is used, that is, from the upper part of the pump shell at the special water filling vent by the water filling funnel (or an inverted ordinary bottle with the bottom removed) to fill the water. For small pumping stations with inlet pipe diameter less than 300mm, the inlet of the inlet pipe is usually equipped with a bottom valve, which can also be filled with water from the outlet of the pump (pumping stations with shorter outlet pipes) to the pump. Because there is no need to buy other water-filling equipment, in the current small rural pumping station, this method of filling water is more common.
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