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, � <br /> OSTP Basic Pump Selection Design uN���Rs�TY <br /> Minnesota Pollution Worksheet OF MINNESOTA ___ ����`, <br /> Control A enc - <br /> 1. PUMP CAPACITY Project ID: v 11.09.22 <br /> Pumping to Gravity or Pressure Distribution: C �raviry C Ress�re Selection required 2 <br /> 1. If pumping to gravity enter the gallon per minute of the pump: �GPM (f0-45 9Pm) <br /> 2. If pumping to a pressurized distribution system: 38.0 GPM <br /> (Line it ojPressureDistribution) w�i��•.,i�»t•„„y�,e�, <br /> s n��i oi a�,a,���� <br /> 2. HEAD REQUIREMENTS �� <br /> �h <br /> A. Elevation Difference 15 ft Sa°p'y`'�Q\e� <br /> between pump and point of discharge: °'°`_"""° E�P�a,�°^:" <br /> '� ( --ane�o�« <br /> I _ � <br /> B, Distribution Head Loss: �ft 1 <br /> i ' --------- - --'------------ <br /> C. Additional Head Loss: �ft(due to special equipment,etc.) <br /> Table I.Friction Loss in Plastic Pipe per 100ft <br /> -_____ ._ <br /> -- - -- <br /> Distribution Head Loss ' Pi e Diameter (inchesl <br /> Gravity Distribution = Oft FIOw Rdte ,_______(?___,_ <br /> --- _ <br /> tGPMI 1 1.25 ; 1.5 2 <br /> _____-------�--------+----- <br /> Pressure Distribution based on Minimum Average Head 10 � 9.1 � 3.1 � 1.3 0.3 <br /> Value on Pressure Distribution worksheet: 12 ; 12.8 �� 4.3 � 1.8 j 0.4 <br /> Minimum Avera e Head Distribution Head Loss 14 i 17.0 5.7 i 2.4 0.6 <br /> 1 ft 5ft 16 21.8 ' 7.3 � 3.0 � 0.7 <br /> 2ft 6ft 18 i � 9.1 i 3.8 i 0.9 <br /> Sft �Oft 20 � � 11.1 ; 4.6 I 1.1 <br /> 25 ! ! 16.8 I 6.9 ! 1.7 <br /> D. 1.Supply Pipe Diameter. 2.0 in 30 i ' 23.5 i 9.7 � 2.4 <br /> 35 � i ; 12.9 � 3.2 <br /> 2.Supply Pipe Length: 228 ft 4p � � � 16.5 I 4.1 <br /> 45 �' � i 20.5 I 5.0 <br /> E. Friction Loss in Plastic Pipe per 100ft from Table I: 50 � � � 6.1 <br /> i <br /> Friction Loss= 3.67 ft per 100ft of pipe 55 � i 7.3 <br /> b0 � ! 8.6 <br /> F, Determine Equivalent Pipe Length from pump discharge to soil dispersal area discharge 65 I 10.0 <br /> point. Estimate by adding 25%to supply pipe length for fitting loss. Supply Pipe Length 70 i ' ��,q <br /> (D.Z) X 1.25=Equivalent Pipe Length 75 � � I 13.0 <br /> 85 '! ' � � 16.4 <br /> 228 ft X 1.25 = 285.0 ft q5 � � 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�oofc x 285.0 ft - �oo = 10.5 ft <br /> H• Total Head requirement is the sum of the Elevotion Difference (Line A),the Distribution Head Loss(Line B),Additional Head Loss(Line C),and the <br /> Supply Friction Loss(Line G ) <br /> 15.0 ft + 5.0 ft + �ft + 10.5 ft = 30.5 ft <br /> 3. PUMP SELECTION <br /> A pump must be selected to deliver at least 3$ GPM(Line 1 or Line 2)with at least 31 feet of total head. <br /> Comments: <br />