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� , Sizing of Pum� Station <br /> � <br /> 1. Detcrminc Surfacc Arca T <br /> Rcctanglc=Arca= L x W W'��h <br /> x = square feet 1 <br /> Lcngth <br /> Circle= Area =n x(Radius)z <br /> 3.14 x x = squue feet Radius <br /> Other=Get Surface Area from Manufacturer n=3.1a <br /> square feet <br /> 2. Calculate Gallons Per inch <br /> Thcre arc 7.5 gallons per cubic foot of volume,thcrcforc you must multiply the arca <br /> times the conversion factor and divide by 12 inches per foot to calculate gallons per inch <br /> Arca x 7.5 gpft 3+12 inchs per foot <br /> x 7.5+12 =��$allons/inch �E�/� �'1�,'"�� �'�S <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of watcr covcring pump) Estimata!Scwage Flows in Gallons per day <br /> (Height(in)+2 inches) x gallons/inch(#2) �g�� <br /> (1�_+ z )x � _ �?2 gallons um r <br /> of Type I Typc[I Typc III Typc <br /> Iicdrooms 1 V <br /> 4. Calculate Total Pumpout Volume <br /> a. To maximize um life select sum size for 4 to 5 um o rations r da 2 300 225 lA0 <br /> P P P P P P� P� Y• 3 aso 300 21s � <br /> Ob ��+4= �6� �<9��OItS pC�C10SC' 4 600 375 256 �a�ucs <br /> b. Calculate drainback 5 750 45U 294 ;,, <br /> -- 6 900 525 332 Trr��. <br /> 1. Determine total pipe length,�S feet. 7 loso 600 370 ""` <br /> 2. Detcrmine liquid volume of pipe, /� gallons per 1(x)fctit. 8 1200 675 408 «,i�� <br /> 3. Multiply length by valume: Drainback quantity= <br /> �— feet x�gallons/]00 ft. __�gallons. <br /> Pi diameta inchas Gallun.a r 100 fce� <br /> c. Total pump out volume equals dose volume+drainback 1 4.4 <br /> ��� eallons per dose+�o _gallons= ��� gallons 1.25 7.77 <br /> 1.5 10.58 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches) 2 17.43 <br /> Depth(in)x gallons/inc (#2)= 2.5 24.87 <br /> � x 2.3 =�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 /> �x.75=�gallons <br /> Reservc Capacity <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+gallons alarm+gallons mserve capcity <br /> ii3+�i4 c+#5+#6 <br /> �L Z +�+�[(�+�b =�gallons Alarm <br /> Pump On <br /> 8. Totai Depth (Total gallon dividcd by gallon per inch) <br /> Total Gal on (#7)+�allon �nch(#2) To I Pumpout Volumc <br /> ���+ 23 =�inches Pump OfF <br /> Pump Hcight <br /> 9. F7oat Scparation Distancc(equal total pumpout volumc) <br /> Total p�mpout volume�( 4c)+gallons/inch(#2) <br /> �S_�o<� = inches <br />