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izin,g of Pump Station <br /> T <br /> l. Dctrrminc Surfacc Ama �y��ih <br /> Rectanglc=Arca= L x W l <br /> x = square feet �,�„gih <br /> Circle= Arca=n x(Radius� <br /> 3.14 x x = square feet Kadius <br /> a=3.1a <br /> Other=Cet Surface Area from Manufactumr <br /> square feet <br /> 2. Calculate Gallons Pcr inch <br /> Thcre am 7S gallons per cubic foot of volumc,thcrcforc you must multiply thc ama <br /> times the conversion factor and divide by 12 inches per foat 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 af a�atrr covcring pump) �timata!Scwagc Flows in Gallons per Jay <br /> (8Pd) <br /> (Height(in)+2 inc s) x$�allons/inch(#2) um r <br /> (��+�)x LO =•24o gallons of lypc I Typc II Typc lIi Ty pc <br /> Bcdrooms 1 V <br /> 4. Calculate Totai Pumpout Volume 2 30p 225 180 <br /> a. To maximize pump life select s ps�ze for 4 to 5 pump operations per day. 3 450 300. 218 � <br /> S� gpd+4=��_gallons per dose 4 600 375 256 �;��� <br /> S 750 450 294 in <br /> b. Calculate drainback 6 900 525 332 �Yr��. <br /> 1. Determine total pipe length,��a feet. 7 1050 600 370 '�i� <br /> 2. DeMrmine liquid volume of pipe, 7/ .4�gallons per 100 fcct. 8 1200 675 408 �„i,,,,,,,: <br /> 3. Multi ly length b volume: Drainback qua ty= <br /> ��fcet x�gallons/]00 ft._�gallons. <br /> P' diamaa inche+ ' Gail«u r 100 f�ct <br /> c. Total pump o ��lu�me equals dose volu drainback q, <br /> ,���! O �allons per dose+ 2� gallons= 2� 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)= 2.5 24.87 <br /> zOx Z. _�gallons 3 38.4 <br /> 4 6fi.1 <br /> 6. Calculate Reserve Capacity(75%thc daily flow) <br /> Dail�,fl�(see Page 12 875 <br /> '/ x.75=s allons <br /> Rcservc Capacity <br /> 7. Calculate total gallons <br /> gallons over pump+gallons pumpout+�3lions alarm+gallons mserve capcity <br /> #3+#4 c+#5+#6 <br /> .2�!►Q+7�+�+5�7=�� gallons A� <br /> Pump On <br /> S. Tatal Depth (Total gallon dividcd by gallan per inch) <br /> Total Gall n(�7>+gallan/inch(#2) To I Pumpout Volumc <br /> �Q�+ 20 =��inches <br /> Pump Off <br /> Pump Hcight <br /> 9. Float Scparation Distancc(equal total pumpout volumc) <br /> Total umpout volum (#4c)+gallons/inch(#2) <br /> Q�+.ZO =�inches <br />