No flow pressure at the centrifugal pump outlet
Thread Content
The installation height of the centrifugal pump has been increased by 800 units, due to foundation reasons; however, the suction pipe has not been raised, which results in very low outlet flow and pressure. Is there any way to increase the outlet pressure without raising the height of the suction pipe, such as by increasing the speed of the water pump or reducing the diameter of the inlet pipe?
1. Increase rotational speed 2. Increase impeller diameter 3. Increase inlet pressure
If the tank pressure permits, it is possible to consider increasing the tank pressure appropriately
The tank pressure is constant. It can’t be changed
The installation height of yours is too high; the pump can’t draw fluid anymore{:3_57:}
Increasing the pump speed or other methods can increase the outlet pressure and flow rate?
Yes. Since the foundation was rebuilt, the pump’s installation height increased, but the suction pipe was not raised
Currently, the suction pipe of the water pump has a diameter of 8 inches, while the outlet pipe has a diameter of 4 inches. The pump is installed at too great a height, resulting in an excessive suction lift; this causes no pressure or flow at the pump’s outlet. Is there any simple way to increase the outlet pressure? Increased traffic
Relying on changing the suction pipe to increase the net positive suction head yield will have little effect. . . . You can raise the liquid level; the effect will be more noticeable
Is there a limit on how far the water pump’s suction pipe can be submerged in water? If it is submerged too deep, does that affect the pressure at the pump’s outlet?
The base of the pump has been raised, which means the NPSHA has decreased; this makes cavitation more likely to occur. It is necessary to increase the pressure at the inlet in order to reduce the resistance in the pipeline. 1. Increase the size of the inlet pipeline, 2. Reduce the number of bends in the inlet pipeline, 3. Increase the pressure in the tank.