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.:_,.; ; __ . � ._ � .. ; . <br /> ,� � ;. ,� � _ <br /> :�• �� ;: , ; <br /> r.• ; _ �� ;..�-�•�:s�` �. r, . �'��a"■� <br /> ���.� - _ _ -� � <br /> . � �► �' � � <br /> �' `� - Sizing of Pum� Station �; <br /> , <br /> 1. Dctrrminc Surfacc Arca T x� <br /> Rcctanglc=Arca= L x W W'��h <br /> x = square feet 1 ' � <br /> I.cnglh ;,� <br /> Circle= Area=n x(Radius)2 <br /> ,�, <br /> 3.14 x x = square feet RaJius � <br /> ;�. <br /> Other=Get Surface Area from Manufacturcr n=3.14 `� <br /> :;: <br /> squue feet <br /> �;; <br /> 2. Calculate Gallons Per Inch '`� <br /> Thcre am 7.5 gallons per cubic foot of volume,thercfore you must multiply the ama � <br /> times the conversion factor and divide by 12 inches per fcx�t to calculatc gallons per inch <br /> Arca x 7.5 gpft'+12 inchs per foot `� <br /> ;� <br /> =� <br /> x 7.5+12 = - gallons/inch <br /> 3. Calculate Gallons to Cover Pump(with 2 inches of watcr covcring pump) Es�imaiat Scwage Flows in Gallons per day ti'� <br /> (Height(in)+2 inches) x gallons/inch(#2) um r (g�) '� <br /> ( + )x ' = gallons of Type I Typc II Typc llI Typc `"'': <br /> Bedrooms 1 V �+ <br /> 4. Calculate Total Pumpout Volume 2 300 225 180 '� <br /> +ryw <br /> a. To maximize pump lifc select sump size for 4 to 5 pump operations per day. 3 450 300 218 � '� <br /> �+4= gallons per dose 4 600 375 256 °r`"° ;`� <br /> �yi� . <br /> b. Calculate drainback S 750 45U 294 ;,, ;a� <br /> 1. Determine total pipe length, feet. 7 0 0 600 370 �""'� '� <br /> �;:; <br /> 2. DeMrmine liquid volume of pipe, gallons per 1(x)fect. 8 1200 675 408 «,i�� �.:�;' <br /> 3. Multiply length by volume: Drainback quantity= ',;� <br /> � <br /> fcet x gallons/]00 ft.= gallons. .F� <br /> Pi di�meta inchc� C�Iluns r 100 fcei �,`,�,� <br /> c. Total pump out volume equals dose volume+drainback 1 4.4 <br /> Eallons per dose+ gallons= "�''�=�� gallons 1.25 � �� '''`; <br /> 1._5 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 /> x • = gallons 3 38.4 ';� <br /> 4 66.1 � <br /> 6. Calculate Reserve Capacity(75%a the daily flow) '°� <br /> Daily flow(see page D-7)x.75= ';� <br /> ' x.75= gallons <br /> Rcservc Capacity �. <br /> 7. Calculate total gallons �� <br /> gallons over pump+gallons pumpout+fiallons alarm+gallons reserve capcity r <br /> #3+#4 c+�15+#6 �,� <br /> + . + , , + ' ' c`' = gallons Alarm � <br />� Pump On �� <br /> S. Total Dcpth (Total�allon dividcd by gallon per inch) <br /> Total Gallon{�7)+�allon/inch(#2) To I Pumpout�lumc <br /> + — 'inches <br /> Pump Off <br /> Pump Hcight <br /> 9. Float Scparation Distance(equal total pumpout voli�mc) <br /> Total pumpout volume(#4c)+gallons/inch(#2) <br /> ' — inches <br /> : , ;t <br /> �` � <br /> �_ . . . _ . �:... . . . . _ r. , <br />