Water Well Journal
Issue link: http://read.dmtmag.com/i/451364
WWJ February 2015 45 Twitter @WaterWellJournl Table 1. Pump/Motor Diameter Criteria for Water Well Sizing Nominal and Max. OD Bowl Diameter (inches) (1) 2"/3" 4"(3.8) 4"(3.8) 5"(4.8") 5"(4.8") Nominal Pump Speed (RPM) and Pump Type(s) 1 (2) 3600 (VSP) 3600 (VSP) 3600 (VSP) 3600 (VSP) 3600 (VSP) Typical BEP 2 Zone Flow Range (GPM) (3) 1-25 3-100 3-100 40-250 40-250 Minimum Well Casing/Liner Diameter (ID/OD in inches) 3 Flow Range Design For Retrofit/Existing Wells (4) 3"/4ID(1"-1.25"R) 2-20 GPM 4" ID(Liner)(1"-2"R) 2-60 GPM 4.5" ID(Liner)(1"-2.5"R) 5-90 GPM 5" ID(Case/Liner)(2"/2.5"R)40-90GPM 6" ID(2"-2.5"R) 40-90 GPM Optimum Well Casing/Liner Diameter (ID/OD in inches) 4 Well Target Design Yield For New Well Sizing (5) 6" ID(1"-1.5"R) 5-25 GPM 5" ID/OD(Liner)(1"-2.5"R) 7-90 GPM 6" ID/OD(1"-2.5"R) 13-90 GPM 7" OD Liner(2"-3"R) 50-160 GPM 8" ID(2"-4"R) 50-250 GPM (Use VTP Driver) 5 or Nominal Size and Speed of Submersible Motor (VSP) (Diameter in inches and Speed in Poles) 6 (Tables 2/3 for Motor Data (6) 2"-3"(2PVSP) 4" (2PVSP) 4"/6" (2PVSP) 4"/6" (2PVSP) 4"/6" (2PVSP) 6" OD=5.5" 3600 (VSP) 1800 (VTP) 3500 (VSP) 50-500 100-250 50-500 6 ID(2"-2.5"R) 50-90 GPM 6"/8"ID(3"/4"C) 100-150 GPM 8" ID(2"-5"R) 50-500 GPM 8" ID(2"-4"R) 50-350 GPM 10" ID(4"/5"C) 100-250 GPM 10" ID(2"-5"R) 50-500 GPM 4"/6" (2PVSP) (Use 4P VTP Driver) 4"/6" (2PVSP) 7" OD=6.7" 8" OD=7.5" 3600 (VSP) 1800 (VTP) 3600 (VSP) 1800 (VTP) 1200 (VTP) 150-700 150-350 200-1200 100-700 100-400 8" ID(3"-5"R) 150-600 GPM 8" ID(4"/5"C) 150-300 GPM 8" ID(4"/5"R) 200-600 GPM 8" ID(4"-6"C) 100-600 GPM 8" ID(4"-6"C) 100-400 GPM 10"/12"ID(3"-6"R) 150-700 GPM 10" ID(4"-6"C) 150-350 GPM 12" ID/14"OD(4"-8"R) 200-1200 GPM 10" ID(4"-6"C) 100-600 GPM 10" ID(4"-6"C) 100-400 GPM 6"/8" (2PVSP) (Use 4P VTP Driver) 6"/8" (2PVSP) (Use 4P VTP Driver) (Use 6P VTP Driver) 9" OD=8.5" 10" OD=9.5" 10" 3600 (VSP) 1800 (VTP) 3600 (VSP) 1800 (VSP) 1200 (VTP) 1800 (VTP) 400-1500 300-800 500-1600 200-1750 300-1000 200-1750 10" ID(5"/6"R) 400-900 GPM 10" ID(5"/6"C) 300-600 GPM 10" ID(5"/6"R) 500-900 GPM 10" ID(4"-6"R) 200-900 GPM 10" ID(5"/6"C) 300-600 GPM 10" ID(5"/6"C) 200-600 GPM 12" ID/14"OD(5"-8"R) 400-1500 GPM 12" ID(5"-8"C) 300-800 GPM 12"ID/14"OD(5"-8"R) 500-1500 GPM 12"ID/14"OD(4"-8"R) 200-1500 GPM 12"ID/14"OD(4"-8"C) 300-1000 GPM 12"ID/14"OD(5"-8"C) 200-1200 GPM 6"/8" (2PVSP) (Use 4P VTP Driver) 6"/8" (2PVSP) 8" (4PVSP) (Use 6P VTP Driver) (Use 4P VTP Driver) 11"/12" OD=11.5" 11"/12" 3600 (VSP) 1800 (VSP) 1200 (VTP) 1800 (VTP) 600-2000 350-2800 300-1500 350-2800 12" ID(5"-8"R) 600-1500 GPM 12" ID(4"-8"R) 350-1500 GPM 12" ID(5"-8"C) 300-1200 GPM 12" ID(5"-8"C) 350-1200 GPM >14"/16"OD(5"-10"R) 600-2000 GPM >14"/16"OD(4"-10"R) 350-2500 GPM >14"/16"OD(5"-10"C) 300-1500 GPM >14"/16"OD(6"-10"C) 350-2500 GPM 6"/8"/10" (2PVSP) 8"/10" (4PVSP) (Use 6P VTP Driver) (Use 4P VTP Driver) 13"/14" OD=13.5" 13"/14" 3600 (VSP) 1800 (VSP) 1200 (VTP) 1800 (VTP) 1200-2000 800-4500 1000-3500 800-4500 14"/16"OD(8"/10"R) 1200-2000 GPM 14"/16"OD(6"-10"R) 800-2500 GPM 14"/16"OD(8"/10"C) 1000-2500 GPM 14"/16"OD(8"/10"C) 800-2500 GPM >16"/18"OD(8"-10"R) 1200-2000 GPM >16"/18"OD(6"-12"R) 800-4000 GPM >16"/18"OD(8"-12"C) 1000-3500 GPM >16"/18"OD(8"-12"C) 800-4000 GPM 6"/8"/10" (2PVSP) 8"/10"/12" (4PVSP) (Use 6P VTP Driver) (Use 4P VTP Driver) 15"/16" OD=15.5" 15"/16" 1800 (VTP) 1200 (VTP) 900 (VTP) 1800 (VSP) 2000-5000 1200-3500 1200-3500 2000-5000 >18"OD(10"-12"C) 2000-4000GPM >18"OD(10"-12"C) 1200-3500GPM >18"OD(10"-12"C) 1200-3500GPM >18"OD(10"-12"R) 2000-4000GPM >18"/20"OD(10"-14"C) 2000-5000 GPM >18"/20"OD(8"-12"C) 1200-3500 GPM >18"/20"OD(8"-12"C) 1200-3500 GPM >18"/20"OD(10"-14"R) 2000-5000 GPM (Use 4P VTP Driver) (Use 6P VTP Driver) (Use 8P VTP Driver) 8"/10"/12"/14"(4PVSP) 17"/18" OD=17.5" 1800 (VTP)(VSP) 1200 (VTP)(VSP) 900 (VTP) 3000-7000 2000-5000 1800-4000 >20"22"OD(12"-16") 3000-7000 GPM >20"22"OD(12"-14") 2000-5000 GPM >20"OD(10"-12") 1800-4000 GPM >24"OD(12"-16") 3000-7000 GPM >24"OD(10"-14") 2000-5000 GPM >24"OD(10"-12") 1800-4000 GPM (VTPDr)/10"-16"(4PVSP) (VTPDr)/12"-16"(6PVSP) (Use 8P VTP Driver) 19"/20" to < 30" 1800 (VTP)(VSP) 1200 (VTP)(VSP) 900 (VTP) 3000-10K 3000-12K 2500-15K For >22" to >30" Diameter: Size pump for the specific application, existing well design, and required flow rate (bowl diameter) Size well casing and design the well for the specific application, well screen design, pump size, and the design flow rate (bowl diameter) (VTPDr)/10"-16"(4PVSP) (VTPDr)/12"-16"(6PVSP) (Use 8P VTP Driver) 1 VTP=Vertical Turbine Pump and VSP=Vertical Submersible Pump. All pumps are assumed to be water well type. 2 BEP = Best Efficiency Point. BEP Zone = +/- 10% of displayed flow rates at the bowl size BEP. 3 Based on the minimum pump chamber size required for the bowl and column(C) (VTP) or the bowl, riser pipe (R), and drop cable (VSP). 4 Based on optimum well sizing for bowl and column (VTP) or bowl/motor, drop pipe, and drop cable (VSP). 5 VTP Driver (VTPDr) can be a Vertical Holloshaft (VHS), Vertical Solidshaft (VSS), or Right-Angle Drive with horizontal electric motor or engine. 6 2 Pole (2P) = 3600 RPM. 4 Pole (4P) =1800 RPM. 6 Pole (6P) = 1200 RPM. 8 Pole (8P) = 900 RPM nominal speed. Maximum and Minimum VSP Riser Pipe (R) and VTP Column Pipe(C) Design Flow Rates Submersible Pumps: 1"=3-10 GPM. 1.25"=20 GPM. 1.5"=30 GPM. 2"=60 GPM. 2.5"=90 GPM. 3"=160 GPM. 4" = 350 GPM. (Max. Hf = ~10'/hundred feet of riser pipe) 5"=600 GPM. 6"=900 GPM. 8"=1500 GPM. 10"=2500 GPM. 12"=4000 GPM. (For minimum design flows in riser pipes for sizes: 1"-4" use the maximum value of the size immediately preceding; for sizes 5"-12" use two sizes lower.) Example: Use 160 GPM as minimum flow for 4" riser pipe; use 350 GPM (4" maximum) as the minimum flow for 6" riser pipe. Vertical Turbine Pumps: 4" water-lube = 150 GPM. 5" water-lube = 300 GPM. 6" water-lube = 600 GPM. (Max. hf = 6'-8'/hundred feet of column pipe) 8" water-lube = 1200 GPM. 10" water-lube = 2500 GPM. 12" water-lube = 4000 GPM. (For minimum flows, use the column size immediately preceding.) Example: For 8", use 600 GPM (6"maximum) as the minimum flow. Note: All submersible pump installations are assumed as Schedule 40 steel; threaded and coupled (T&C) (1"-12") or alt. of welded (>8") style drop pipe with a limiting friction loss ("C" = 110) of ~10' per hundred feet of pipe at the maximum design flow (Uphole Velocity Range = 5-10 FPS) and with an appropriate size of 3 conductor plus ground flat/twisted style drop cable. Both types: VSP & VTP are assumed as bottom fed. ENGINEERING continues on page 46