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+ ' � � � <br /> Sizing of Pumv Station <br /> l. Detcrminc Surfacc Arca T <br /> Rcctanglc=Arca=L x W W'��h <br /> x = square feet ��ns� <br /> 1 <br /> Circle= Arca=a x(Radius� <br /> 3.14 x x = square feet Radius <br /> Other=Cet Surface Area from Manufacturer R=3.ta <br /> squaze feet <br /> 2. Calculate Gallons Pcr inch <br /> There am 7.5 gallons per cubic foot of volume,thcreforc you must multiply the ama <br /> Hmes the conversion factor and divide by 12 inches per foot to calculate gallons per inch <br /> Ama x 7.5 gpft'+12 inchs per foot <br /> x 7.5+12 =�gallons/inch <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of water covering pump) �timata!Sewage Flows in Gallons per day <br /> (Height(in)+2 inches) x gallons/inc}(#2) �g�� <br /> (�+ � )x JQ_=jd O gallons of r Type I Typc II Typc lII Ty pc <br /> Bedrooms 1 V <br /> 4. Calculate Total Pumpout Volume <br /> a. To maximize pump life select'su`my»si•ze for 4 to 5 pump operations per day. 3 450 300 218 �� <br /> ���+4=__L�gallons per dosc 4 600 375 256 �.�� <br /> b. CalculaM drainback S 750 450 294 ;,, <br /> P� $ � 6 900 525 332 �Yr��. <br /> 1. Deterrr►ine total i len th, O feet. 7 1050 6W 370 ��'" <br /> 2. Determine liquid volume of pipe,�gallons per 1(x)fcti•t. 8 1200 675 408 �,i�� <br /> 3. Multiply length b v lume: Drainback quantity= � <br /> �feet x�.3gallons/l00 ft.= J gallons. <br /> P' d'ameta inche+ Calluns r 100 fcct <br /> c. Total pump out v ume equals dose volum�draint�ck <br /> �� 8allons per dose+ -S gallo»s= /�� gallons 1.25 7.77 <br /> 1.5 10.58 <br /> 5. Calculate Volume for Alarm(typicaliy 2 to 3 inrhes) 2 17.43 <br /> Depth(in)x gailons/inch(�2)= 2.S 24.87 <br /> �o x L = �o gallons 3 38.4 <br /> 4 66.1 <br /> 6. Calculate Reserve Capacity(75%the daily Flow) <br /> Daily flow(see page D-7)x.75= <br /> 7�0 x.75=�_��gallons <br /> Reservc Capaciry <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+gaiic�ns�larm+gallons mserve capcity <br /> #3+#4 c+#5+#6 A� <br /> I�D +,/93 +�o+.��_/D7.fgalions <br /> Pump On <br /> 8. Total Depth (Total gallon divided by gallcm per inch) <br /> Total Gallon(�t7)+gallon/in h(#2) <br /> ���� + To 1 Pumpout Volumc <br /> Zo = inches Pump Off <br /> Pump Hcight <br /> 9. Float Separation Distance(equal total pumpout vc�lumc) <br /> Total umpout volume #4c)+gallons/inch(#2) <br /> � �' + Zo = ' L inches <br />