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Feb 27 07 08:19a Schrupp Excavating LLC 218-587-3473 p.4 <br /> PUMP SELECTION PROCEDURE <br /> Determine Pump Capacity <br /> 1) Gravity Dist fbuftn <br /> a)Minimum is 10 GPM <br /> b)Maximum is 45 GPM PetfOratian Discharges(GR� <br /> M) <br /> Pertrrration diameter(in) <br /> 2)Pressure Distribution Tit #N <br /> a)Number of perforated laterals L2O 3`2 ¢ <br /> b)Perforation spacing <br /> c)Length of lateral i� 0.56 0.74 <br /> t).s9 0.90 <br /> rock layer length: 1-1 p -2 ft= 3.? � 0.80 1.04 <br /> .d)Numberof spaces between perfs <br /> ft forsingte homes <br /> 2c: �? /(2b): 3 ft for everything else <br /> e)Perforations per lateral <br /> 2d <br /> i � +1 - E <br /> 0 Total number of Perforations <br /> (2e): x Fridon Loss in Plastic Pipe <br /> g)Select pert discharge from table 7 <br /> h)Pump capacity ( �� 'i.5" 2" 3" <br /> 2f}. 5 x GPM 20 2.47 0.73 .0.11 <br /> Determine Head Requirements 25 3.73 1.11 0.16 <br /> 1)Elevation difference <br /> 30 5.23 1.55 023 <br /> a)Between pump and paint of discharge �/ b 2• 0.30 <br /> �_.. 40 8.91 2.64 0.39 <br /> b) If system,is pressure dWbtxtton (1a)+5 r{ 45 11.07 5.28 0.48 <br /> If system is gravity distribution (1a)+0 ft j ft 5(} 13,4$ 3.99 0.58 <br /> 2) Friction loss 55 4.76 0.70 <br /> a)Select value from table �.5 ft1100 ft of pipe 60 5.60 0.82 <br /> b)Total pipe length from pump to discharge point 65 B.48 0.95 <br /> 70 7.44 1.09 <br /> i length: -510 x 1.25 <br /> d)Total friction loss <br /> (2a): �- 5" x(2b}; l 100= ) -- <br /> 3)Total head required M' apt number of IN' petfs per lateral <br /> #a ' 1b: +(2d): i <br /> Perforation �" 2 K 2" <br /> Select pump that can deliver at least t GPM with at <br /> least 19 feet of total head. 2.5 ft 14 . 18 2B <br /> 3.0 ft 13 17 26 <br /> 1)Minimum lateral diameter , 1 � 8.3 ft 12 is 25 <br /> a)Select the value from the bottom table ( 4.0 ft 11 15 23 <br /> 5.E}ft 10 14 22 <br /> •a b)Diameter if a center manifold system ' <br />