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,-�" � r , <br /> , ,, <br /> t� � y <br /> y � r � <br /> s . <br /> • <br /> �izin$ of Pump Station <br /> I T <br /> 1. Dctcrminc Surfacc Arca I <br /> Rcctanglc= Arca = L x W " w�dih <br /> L <br /> x = square feet 1.�„6�f� <br /> � <br /> Circic= Arca =n x(Radius)Z <br /> 3.14 x x_ = square feet K;,�;,,� <br /> Other=Cet Surface Area from Manufacturer ' n=3.t4 <br /> square feet I <br /> 2. Calculate Gallons Pcr lnch <br /> Thcre arc 7.5 gallons per cubic foot of volumc,thcreforc you ust muitiply thc arca <br /> times the conversion factor and divide by 12 inches per foot t calculate gallons per inch <br /> Arca x 7.5 gpft'+12 inchs per foot <br /> - x 7.5+12 = /._�<% gallons/inch • I - - <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of H�ater cov ring pump) Estimala!Scwagc Flows in Gallons per day <br /> (Height(in)+ 2 inchcs) x gLallons/i�uh(#i2) �g�� <br /> ( i"� + . )x = _.<-.� �,:.'gallons of r Type I Typc I[ Typc III TYpc <br /> �d.. <br /> Iicdrooms 1 V <br /> 4. Calculate Total Pumpout Volume 2 300 225 180 <br /> a. To maximize pump life select sur�p sizc for 4 to 5 pump oper� tions per day. 3 450 300 218 � <br /> "?:.': y`;> $Pd+4= �� l galions Exr dosc 4- 600._ 375 256 �.i�� <br /> . b. Calculate drainback C.S� ' 750 45U 294 ;� <br /> 6 900� 525 332 �Yr��, <br /> l. Determine total pipe length, %;�'"�.�feett� 7 1050 600 370 ""` <br /> 2. Detcrminc liquid volume of pipe,i ' �':gallons per 1(H)fcYt. 8 1200 675 408 «,i��,,,;,,,: <br /> 3. Multi�ly Icngth by,valume: Drainback quantity= <br /> '-`' '; fcet x :'-' ',�.' allons/]00 ft. _ .�_f allons. <br /> i g � <br /> � Pi diamelet inches G�Iiexu r 100(ccl <br /> c. Total pump out .volume equals dose volum�e+drainback � � , 1 4.4 <br /> �%� Qallons per dosc+ �'�__ gallons= -- f ' gallons 1.25 7.77 <br /> l 5, �.10.58-- <br /> 5. Calculate Volume for Alarm(typically 2 t�3 inches} ' 2 -r�'I�43 .' <br /> Depth(in)x gallons/inch(#2)= 2.5 ��-24.87 <br /> �r� x �--> _,-=� .. 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 /> `i�_">�� x.75=.'-�':- c'_ gallons I <br /> Reserve Capacity <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+i;aiic�ns alarm+gall ns reserve capcity <br /> #3+ #f4 c+#t 5 +# 6 <br /> -�_'` + - �/ + '��, + � �•�= f'`, " gallonS Alarm <br /> Pump On <br /> S. T�tal Depth (Total gallon dividcd by gallc�n per inch) - <br /> Total Gallon (�7)+�allon/i ch(#2) <br /> � ' : + - - -��' -�' inches To 1 Pumpout Volumc <br /> — Pump OfF <br /> Pump Hcight <br /> 9. Float Scparation Distancc(cqual total pumpout volumc) <br /> Total pumpout volumc(#4c)+�allons/inch (#2) ' <br /> � /% % �i - '�inclies <br />