1) A pump operates at 3000 psi and delivers 5 gpm. It requires 10 HP to drive the pump. Determine the overall efficiency of the pump. If the pump is driven at 1000 rpm, what is the output torque to the pump?
2) Select an inexpensive pump for a front-end loader in a gravel pit where contamination is likely. Pressure required is 2000 psi, flow rate is 20-gpm and rpm is 2500.
What pressure control valve would be needed?
What horsepower is required to drive it if it is 85% efficient?