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Sizing of Pum� Station <br /> 1. Dctcrminc Surfacc Arca T <br /> Rcctanglc=Arca = L x W W"��h <br /> L <br /> _x = square feet I.�„b��� <br /> Circic= Arca =rz x (Radius)z <br /> 3.14 x_ x_ = square feet �Z���u� <br /> Other=Gct Surface Area from Manufacturcr n=3.t4 <br /> square feet <br /> 2. Calculate Gallons Per lnch <br /> Thcre are 7.5 gallons per cubic foot of volumc,thcreforc you must multiply the area <br /> times the conversion factor and divide by 12 inches per foot to calculate gallons per inch <br /> Arca x 7.5 gpft'+12 inchs per foot <br /> x 7.5+12 =�E! gallons/inch <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of��ater covering pump) Estima►a!Sewage Flows in Gallons per day <br /> (Height(in)+2 inc es) x gallons/inc (#�2) �g�� <br /> (�+�)x�_��G" gallons of r Type I Typc i[ Typc III Typc <br /> Iicdrooms 1 V <br /> 4. Calculate Total Pumpout Volumc 2 100 225 180 <br /> a. To maximize pump lifc select s s�zc for 4 to 5 pump o}xrations per day. 3 450 300 218 � <br /> �gpd+4=���gallons}xr dosc 4 600 375 256 °�`�° <br /> b. Calculate drainback 5 750 450 294 Vain� <br /> 6 900 525 332 �Yr��. <br /> 1. Determine total pipc lengtlll�feet. 7 ]050 6W 370 ""` <br /> 2. Detcrmine liquid volume of pipe�1�gallons}xr 1(x)fctit. 8 1200 675 408 �„i;,�;,,,s <br /> 3. Mult�length b o. me: Drainback qu � ity= <br /> z�C`i fcet x allons/100 ft.= gallcros. <br /> Vi di�metcr inchcs Cy�l�ns r 100 fui <br /> c. Total pump o olume equals dose valu� e drainback 1 4,4 <br /> allons pE:r dosc+—����allc�ns= ���Z gallons 1.25 7.77 <br /> 1.S 10.58 <br /> 5. Calculate Volume for Alarm(typically 2 to 3 inches} 2 17.43 <br /> Depth(in)x gallons/inch(#2)= 2.S 24.87 <br /> Z� x Z. _�gallons 3 38.4 <br /> 4 66.1 <br /> 6. Calculate Reserve Capacity(75% the daily flow} <br /> Dail flow(see page D-7)x.75= <br /> ���x.75=-�GiZ gallons <br /> 7. Calculate total gallons Rcservc Capacity <br /> �allons over pump+gallons pumpout+�;ailcyns alarm+gallons reserve capcity <br /> #3+ 4c+# 5 +#6 <br /> Z�U +��Z +�+�_��� gallons Alarm <br /> Pump On <br /> 8. Tc�tal Depth (Total gallon dividcd by gallc�n per inch) <br /> Total Ga on(tf 7)+gallon �nch(#2) To 11 Pumpout Volumc <br /> ��_+�� =s��inches <br /> Pump Off <br /> Pump Hcight <br /> 9. F7oat Scparation Distancc(equal total pumpout volumc) <br /> To�pumpout volumej #4c)+gallons/inch (#2) <br /> � �U inches <br />