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� OSTP Basic Pump Selection Desi�n <br /> UNIVERSITY <br /> Minnesota Pollution Worksheet OF MINNESOTA, � ' <br /> Controi A enc ,,.,�,��� <br /> 1. PUMP CAPACITY Project ID: v 11.09.22 <br /> Pumpinq to Gravity or Pressure Distribution: � �ravny QQ �tess�re Selection required 2 <br /> 1. If pumping[o gravity enter the gallon per minute of the pump: ��GpM (10-45 gpm) <br /> 2. If pumping to a pressurized distribution system: 36.0 GPM <br /> (Line 11 of Preswre Distri6utlon) <br /> oi mi,ystem <br /> 8 pomt of Cischargc <br /> 2. HEAD REQUIREMENTS .n <br /> A, Elevation Difference ��ft ��ppoe\e�9�h <br /> between pump and point of discharge: "�""Pe E,�,,,ro�:"' <br /> II---- differmce <br /> B. Distribution Head Loss: ��ft � _ _ <br /> � . <br /> I ---------------------------- ------------- <br /> C. Additionat Head Loss: �ft(due to special equipment,etc.) <br /> Table I.Friction Loss in Plastic Pipe per t00ft <br /> Distribution Head Loss <br /> Flow Rate �_P�e Diameter {inches) <br /> Gravity Distribution = Oft �- <br /> (GPM► i 1 ' 1.25 1.5 2 <br /> Pressure Distribution based on Minimum Average Head tp i q,1 3.1 1.3 0.3 <br /> Value on Pressure Distribution Worksheet: � <br /> 12 � 12.8 i 4.3 1.8 0.4 <br /> Minirnum Avera e Head �istribution Head Loss �4 I 17.0 i 5.7 2.4 ! 0.6 <br /> 1ft 5ft �6 � 21.8 � 7.3 3.0 0.7 <br /> 2ft 6ft �g � ' 9.1 3.8 0.4 <br /> 5ft 10ft 20 i 1�,� 4.6 1.1 <br /> 25 I 16.8 6.9 1 J <br /> D. 1.Supply Pipe Diameter. 2.0 in 30 ( 23.5 9J 2.4 <br /> 35 � � 12.9 3.2 <br /> 2.Supply Pipe Length: 30 ft 4p I � 16.5 4.1 <br /> E. Friction Loss in Plastic Pipe per 100ft from Table 1: �5 � ' 20.5 ! 5.0 <br /> SO � 6.1 <br /> Friction Loss= 3.32 ft per 100ft of pipe 55 i 7.3 <br /> 60 ( 8.6 <br /> p, Detertnine Equivalent 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 i <br /> (D.2) X 1.25=Equivalent Pipe Length 75 1 i I 73.0 <br /> 30 ft X 1.25 = 37.5 ft q� � � � 16.4 <br /> � 20.1 <br /> G. Catculate Supply Friccion Loss by muttiplying Friction Loss Per f00ft (Line E)by the Equiva(ent Pipe Length (Line F)and divide by 100. <br /> Suppty Friction Loss= • <br /> 3.32 ft per 100ft x 37.5 ft - t00 = 1,2 ft <br /> H• Totel Head requirement is the sum of the E(evation Difference (Line A),the Distribution Head Loss(Line B),Additional Head Loss(Line C),and the <br /> Supply Friction Loss(Line G) <br /> 9.0 ft + 5.0 ft + ��fi + 1.2 ft = 15.2 ft <br /> 3. PUMP SELECTION <br /> A pump must be selected to deliver at least 36 GPM(Line 1 or Line 2)with at least �(� feet of total head. <br /> Comments: <br />