Water Filling Method of Single-Stage Centrifugal Water Pump


Published:

Feb 19,2024

There are two main ways to fill water before starting a single-stage centrifugal water pump: one is to fill with water by assembling a bottom valve. The bottom valve is a one-way valve and is installed at the entrance of the water inlet pipe. The disadvantage of this method is that the head loss of the bottom valve is relatively large. Large, which affects the efficiency of the single-stage centrifugal water pump; the other is water filling without a bottom valve. The advantage of this method is energy saving. Compared with a pump station with a bottom valve, it can save 10% to 15% of energy.

Water Filling Method of Single-Stage Centrifugal Water Pump

There are two main ways to fill water before starting a single-stage centrifugal water pump: one is to fill with water by assembling a bottom valve. The bottom valve is a one-way valve and is installed at the entrance of the water inlet pipe. The disadvantage of this method is that the head loss of the bottom valve is relatively large. Large, which affects the efficiency of the single-stage centrifugal water pump; the other is water filling without a bottom valve. The advantage of this method is energy saving. Compared with a pump station with a bottom valve, it can save 10% to 15% of energy.

Artificial water filling method: For small pump stations with a water inlet pipe diameter less than 300mm, there is usually a bottom valve at the inlet of the water inlet pipe. Generally, the artificial water filling method is used, that is, from the special water filling exhaust hole on the upper part of the water pump shell, the water is filled with water. Fill a water funnel (or an ordinary inverted bottle with the bottom removed) with water. For small pumping stations with an inlet pipe diameter less than 300mm, there is usually a bottom valve at the inlet of the inlet pipe, and water can also be filled into the pump from the outlet of the water pump (a pumping station with a shorter outlet pipe).

Self-directed water filling method: For a semi-submerged pump station (that is, a pumping station where the elevations of the water inlet pipe and the top of the water pump are below the water surface of the inlet pool), water can be introduced into the water pump on its own without manual filling and diversion. The disadvantage of this kind of pumping station is that it does not fully utilize the water absorption capacity of the water pump. At the same time, the installation elevation of the water pump is reduced, which not only increases the amount of foundation excavation, but also makes operation and management more inconvenient; but the advantage is also obvious, that is, it is easy to implement the pumping station. Automated and timely

Vacuum water tank filling method: For small pumping stations without bottom valves, the vacuum water tank filling method can be used. The vacuum water tank is a closed water tank welded with iron sheets. Its volume is three times the volume of the water inlet pipe. The water tank should be installed as close to the water pump as possible, and the bottom height of the water tank should also be slightly lower than the axis of the water pump. The height of the vacuum water tank is generally twice the diameter of the water tank.

Keyword:

Single Stage Centrifugal Pump