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OSTP Basic Pump Selection <br />UNIVERSITY <br />Minnesota Pollution Desien Worksheet OF MINNESOTA <br />lonxroi Agency <br />1. PUMP CAPACITY Project ID: 071420175oilIDA v 04.06.2017 <br />Pumping to Gravity or Pressure Distribution: Pressure <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: 15.0 GPM <br />3. Enter pump description: <br />HEAD REQUIREMENTS <br />A. Elevation Difference ft <br />between pump and point of discharge: <br />B. Distribution Head Loss: ft <br />C. Additional Head Loss: ft (due to special equipment. etc.) <br />Distribution Head Loss <br />Gravity Distribution = Oft <br />Pressure Distribution based on. Minimum Average Head <br />Value on Pressure Distribution Worksheet: <br />Minimum Average Head Distribution Head Loss <br />1ft 5ft <br />2ft 6ft <br />5ft 1 Oft <br />D. 1. Supply Pipe Diameter: 1.5 in <br />2. Supply Pipe Length: 30 ft <br />E. Friction Loss in Plastic Pipe per 100ft from Table I: <br />Friction Loss = 2.67 ft per 100ft of pipe <br />F. Determine Equivalent Pipe Length from pump discharge to soil dispersal area discharge <br />point. Estimate by adding 25% to supply pipe length for fitting loss. Supply Pipe Length <br />(D.2) X 1.25 = Equivalent Pipe Length <br />Elevation <br />Of -- <br />r------------------------------------------- <br />Table I.Friction Loss in Plastic Pipe per 100ft <br />Flow Rate <br />(GPM) <br />pi a Diameter (inches) <br />1 <br />1 1.25_ <br />1.5 <br />2 <br />10 <br />9.1 <br />3.1 <br />1.3 <br />0.3 <br />12 <br />12.8 <br />4.3 <br />1.8 <br />0.4 <br />14 <br />17.0 <br />5.7 <br />2.4 <br />0.6 <br />16 <br />21.8 <br />7.3 <br />3.0 <br />0.7 <br />18 <br />9.1 <br />3.8 <br />0.9 <br />20 <br />11.1 <br />4.6 <br />1.1 <br />25 <br />16.8 <br />6.9 <br />1.7 <br />30 <br />23.5 <br />9.7 <br />2.4 <br />35 <br />12.9 <br />3.2 <br />40 <br />16.5 <br />4.1 <br />45 <br />20.5 <br />5.0 <br />50 <br />6.1 <br />55 <br />7.3 <br />60 <br />8.6 <br />65 <br />10.0 <br />70 <br />11.4 <br />75 <br />13.0 <br />85 16.4 <br />30 ft X 1.25 - 37.5 ft 95 1 1 1 1 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 />2.67 7 ft per 100ft X 37.5 7ft 100 = 1.0 ft <br />H• Total Head requirement is the sum of the Elevation Difference (Line A), the Distribution Head Loss (Line B), Additional Head Loss (Line C), and the <br />Supply Friction Loss (Line G ) <br />6.0 ft 5.0 it + E:::�ft + 1.0 ft = 12.0 ft <br />3. PUMP SELECTION <br />A pump must be selected to deliver at least 15.0 GPM (Line 1 or Line 2) with at least 12,0 feet of total head. <br />