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Sizin�of Pump Station <br /> l. Dctcrminc Surfacc Arca T <br /> Rcctangle=Arca=L x W W'��h <br /> x = square feet 1 <br /> l.cngth <br /> Cirde=Area=rz x(Radius� <br /> 3.14 x x = square feet K��;us <br /> Other=Gct Surface Arca from Manufacturcr n=3.14 <br /> square feet <br /> 2. Calculate Gallons Pcr Tnch <br /> There are 7.5 gallons per cubic foot of volume,therefore you must multiply the area <br /> times the conversion factor and divide by 12 inches}xr foot to calculate gallons per inch <br /> Arca x 7.5 gpft'+12 inchs per foot <br /> x 7.5+12 =�0 gallons/inch �K ' "�'9'aE ��/ <br /> 3. Calculate Gallons to Cover Pump(with 2 inchcs of watcr covcring pump) Estimata!Scwage Flows in Gallons per day <br /> (Height(in)+2 inches) x gallons/inch(#2) �g�� <br /> um r <br /> (�+ Z )x z� =Z�i Ogallons of Type I Typc I[ Typc III Typc <br /> Bcdrooms 1 V <br /> 4. Calculate Totai Pumpout Volume <br /> 2 300 225 180 <br /> a. To maxim�pump life select ump sizc for 4 to 5 pump o}xrations per day. 30� 21 g �,oR, <br /> �_gpd+4= Sd gallons per dose � 6 375 256 °r'"` <br /> b. Calculate drainback 5 750 450 294 Vy�"� <br /> p p g �� 6 900 525 332 �Yr��. <br /> 1. Determine total i e len th 7D feet. 7 1050 600 370 "°` <br /> 2. Detcrmine liquid volume of pipe,l�gallons pc:r 1(x)fect. 8 1200 675 408 �„i'w;,,� <br /> 3. Multiply lcngth by volume: Drainback quantity= <br /> L�Q fcet x,[Z�gallons/100 ft._�gallons. <br /> Pi di�meta inchcs Cdlcnx r 100(ul <br /> c. Total pump out volume equals dose volume+drainback 1 4.4 <br /> /S�O Qallons per dosc+ �d g�llons= � O gallons 1.25 7.77 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) � 17.43 <br /> Depth(in)x gallons/inch(#2)= 2.5 4,87 <br /> 2� x 2 =�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 /> �Q x.75=�gallons <br /> Reservc Capacity <br /> 7. Calculate total�allons <br /> gallons over pump+gallons pumpout+�allons alann+gallons reserve capcity <br /> #3+#4c+#5+#6 <br /> Z�b +�+�d + .��0 = /D galions Alarm <br /> Pump On <br /> S. Total Depth (Total gallon dividcd by gallon per inch) <br /> Tat�Gallon(#!7)+gallon/i h(#2) <br /> y�d +z0 =���-inches I To I Pumpoul Volumc <br /> Pump OfF <br /> Pump Hcight <br /> 9. Float Separation Distancc(cqual total pumpout volumc) <br /> Total�mpout volu (#4c)+gallons/inch(#2) <br /> �DC7 ��_�inches <br />