Purpose of pump outlet pressure interlock
Thread Content
The plant is equipped with several vertical long-shaft centrifugal pumps, model: LC/X 600-25, flow rate: 2500 m3/h, head: 29 m, cooling water flow rate: 6 m3/h, at normal temperature. If the pump outlet pressure falls below 1 kilogram, the pump will stop automatically via interlock. What is the purpose of setting this interlock?
Generally, when the pressure is low, the flow rate increases, which can lead to an overload; the specific process requirements are not clear
Under normal circumstances, if the outlet pressure of the pump is low, it is likely due to insufficient flow at the pump’s inlet; this is probably a mechanism designed to protect the pump.
What is the operating pressure of the equipment connected to the pump outlet? Prevent backflow?
When the pressure at the pump outlet is low, the flow rate increases and the power consumption rises; this serves to protect the pump motor
With a check valve in place, there is no need to worry about backflow; it should be that the flow rate is high when pressure is low, thereby preventing overload.