Start of centrifugal pump
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When starting a centrifugal pump, the outlet valve must be opened slowly, but what voltage at the outlet is considered appropriate? How can we tell? Is it based on the pump’s head?
Based on the pump’s head (head multiplied by the density of the liquid being pumped) plus the pressure boost (the pressure in the tank from which the centrifugal pump draws liquid)
Hello, I have two more questions. 1. What will happen if the pressure at the pump outlet is too high or too low? 2. While ensuring that the pump current does not exceed the limit, can the outlet valve be closed to increase the outlet pressure?
Pay attention to the outlet pressure and the vibration of the inlet pipeline
The outlet pressure of the pump is regulated using minimum backflow. Inlet filters, elbows, etc. can affect the pump outlet pressure
The most important aspect of operating a centrifugal water pump is adjusting the load based on the current. It is controlled by an outlet valve; while maintaining the operating pressure, the flow rate is increased, and in this case the flow rate is increased based on the current. When the design value is reached — increasing the flow rate results in a decrease in pressure and an increase in current ； Reducing the flow rate increases pressure and decreases current. Note that when the outlet valve is fully closed, the pressure is at its highest, the flow rate is zero, and the current is at its lowest. However, over time, as the rotor rotates in the water, some of this kinetic energy can be converted into heat energy, causing the temperature of the pump to rise; in severe cases, this can lead to the pump overheating. . . .
y Pay attention to pressure, flow rate, and current! Pipeline vibration conditions, etc.!