Affinity Laws Calculator
Speed
Speed1 = 1200
Speed2 = 1800
Flow
Flow1 =
Flow2 =
Head
Head1 =
Head2 =
Power
Power1 =
Power2 =
Help
Calculates a pump's flow, head and power based on the laws of Affinity given a future speed from initial speed, flow, head and power. Speed is shaft speed.
Rows
- Speed1: original pump speed r
- Speed2: future pump speed R
- Flow1: original pump flow f
- Flow2: future pump flow F
- Head1: original pump head h
- Head2: future pump head H
- Power1: original pump power p
- Power2: future pump power P
Contributed by Jerry Meyer.
Examples
Given a 1200 rpm pump shaft speed what happens if you change the pump motor to a higher speed 1800 rpm motor? Initial flow is 20 gpm, Head is 50 feet and horsepower is 10 hp. Assume you keep the same impeller diameter.
Speed1: 1,200
Speed2: 1,800
Flow1: 20
Flow2: 30
Head1: 50
Head2: 112.5
Power1: 10
Power2: 33.75 You will need a larger motor
Keywords
Speed1
Speed2
Flow1
Flow2
Head1
Head2
Power1
Power2
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