I am faced with a situation where I want to sap up 280GPM of over flowing water. Problem is there is an existing pump that operates at 1122GPM @ 40 PSI. I wish to use a smaller pump to parallel with the present pump. My system is not equiped with variable speed drives, I use autotransformer...
Can anyone tell me why after increase the stage of a 10inch vertical turbine pump from 3 to 4 stages the flow fell from 288 m3/hr to 240m3/hr (1500RPM)instead of increasing. Please note the pump is operating in the same system. The system of operation is pumping directly inline.
Can anyone tell me why after increase the stage of a 10inch vertical turbine pump from 3 to 4 stages the flow fell from 288 m3/hr to 240m3/hr instead of increasing. Please note the pump is operating in the same system. The system of operation is pumping directly inline.
I am asking anyone out there who knows and can assist me with the issue of NPSH required for a vertical turbine pump. I know how it is calculated and all that. What I need to know is if the requirement changes with each additional stage of the pump. Is it that the requirement given for one stage...
