May I ask whether the control valve should be placed after or before the water pump?
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Is the control valve placed after or before the water pump? It is generally placed after the water pump. What are the disadvantages of placing the control valve before the water pump?
After adjusting the settings at the front and passing by the pump, it changed a bit, right?
The control valve is generally placed after the water pump. If placed in front of the water pump, it may cause insufficient pressure at the pump’s inlet, leading to cavitation and affecting the proper operation and lifespan of the pump. At the same time, control valves in front of the water pump can also cause issues such as unstable water supply in the system. .
Normally, it is placed after the water pump, with the back pressure valve used for adjustment
The control valve should be placed at the pump outlet. Placed at the pump inlet, the pump is prone to air locking and cavitation under certain conditions.
It should be placed after the water pump; the water pump is a power source that needs to operate stably. The control valve is used to adjust for changes in load, thereby ensuring stable operation of the load. If it is placed before the water pump, there is another water pump between the load and the control valve, which means that any changes in load are not addressed in a timely manner.
Pumps consume energy to generate head pressure, while control valves dissipate this head pressure; only minor adjustments are acceptable
For centrifugal water pumps, due to the characteristics of their working principle, it is necessary to adjust the load at the pump outlet; therefore, they should be installed after the pump, for reference purposes.
After the pump, this is common sense; before the pump, insufficient flow can cause cavitation in the pump. When the control valve is closed under certain conditions, it may also lead to the pump head running idle without any fluid, which can damage the pump or the seal