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OSTP Basic Pump Selection Design <br /> MaWorksheet UNIVERSITY <br /> Control Agangr OF MINNESOTA <br /> 1. PUMP CAPACfTy Project ID: <br /> Pumping to Gravity or Pressure Distribution: O crony ®PreM" Selection required <br /> 1. If pumping to gravity enter the gallon per minute of the pump: GPM (10.45 Spm) <br /> 2. If pumping to a pressurized distribution system: 38.0 GPM <br /> 3. Enter pump description: <br /> 2. HEAD REQUIREMENTS 0j0N1N <br /> A. Elevation Difference 19 It a, <br /> between pump and point of discharge: <br /> 8. Distribution Head Loss: �It <br /> saw <br /> C. Additional Head Loss: ft(due to wedA eW07W ,etc.) .............................i............. <br /> Table I.Frktion Loa in Plastie 100ft <br /> t'� Pi Diameter(inches <br /> Gravity Distribution Oft � G Rate <br /> IGam PM► 1 1.25 1.5 2 <br /> Pressure Distribution based on AA rdmurn Average Head 10 9.1 3.1 1.3 0.3 <br /> Value on Pnsssure Distribution wbriedwet: 12 12.8 4.3 1.8 0.4 <br /> 14 17.0 5.7 2.4 0.6 <br /> 1 f 5ft 16 21.8 7.3 3.0 0.7 <br /> 2ft Eft 18 9.1 3.8 0.9 <br /> 5ft 1 Oft 20 11.1 4.6 1.1 <br /> 25 16.8 6.9 1.7 <br /> D. 1.Supply Pipe Diameter: 2.0 in 30 23.5 9.7 2.4 <br /> 35 12.9 3.2 <br /> 2.Supply Pipe Length: 140 It 40 16.5 4.1 <br /> E. Friction Loss in Plastic Pipe per 1008 from Table 1: 45 20.5 5.0 <br /> 50 6.1 <br /> Friction Loss- 3.67 ft per 100ft of pipe 55 7.3 <br /> 60 8.6 <br /> F. Determine Equfvnient Pipe Length from pump discharge to soil dispersal area discharge 65 10.0 <br /> Point. Estimate by adding 25%to supply pipe length for fitting loss. Supply Pipe Length 70 11.4 <br /> (D.2) X 1.25-Equfvnlent Pipe Length 75 13.0 <br /> 85 16.4 <br /> 140 ft X 1.25 - 175.0 ft 95 20.1 <br /> G. Calculate Supply Friction Loss by multiplying Friction Loss Per 100ft (Line E)by the Equivalent Pipe Length (Line F)and divide by 100. <br /> Supply Friction Loss- <br /> 3.67 ft per 100ft X 175.0 ft 100 - 6.4 ft <br /> H. Total Head requirement is the stun of the Elevation Difference (Line A),the Distribution Head Loss(Line 8),Additional Head Loss(Line C),and <br /> the Supply Friction Loss(Line G) <br /> 19.0 ft + 5.0 ft + E==ft + 6.4 ft - 30.4 ft <br /> 3. PUMP SELECTION <br /> A pump must be selected to deliver at least 38.0 GPM(Line 1 or Line 2)with at least 30.4 feet of total head. <br /> Comments: <br />