PumpTech Customer Education http://www.pumptechnw.com Bellevue Moses Lake Canby
PumpTech Product Lines UL Listed Packaged Systems
Two full time Mechanical Engineers Licensed in OR, WA & ID SolidWorks & E-Drawings Viewer AutoCad Compatible Drawings All Systems UL QCZJ Listed Designed to HI Standards
Manufacturing Facility Canby, OR
Installation, Maintenance & Repair 9 Full Time Service Technicians 3 Full Service Shops 6 Service Trucks 23 Ton Crane Truck 8 Ton Crane Truck 3 Ton Crane Truck 2 Ton Flatbed & Trailer 1 Ton Flatbed & Trailer
Pipeline newsletter@pumptechnw.com
Centrifugal Pump Training Series Centrifugal Pump Selection Joe Evans, Ph.D http://www.pumped101.com http://www.pump-zone.com
* Pump Selection Pump Quality Pump Features Efficiency NPSH Curve Shape Window of Operation Affinity Laws
* Pump Quality & Features Quality Price Weight History Features Seals Coupling Materials
The Performance Curve Efficiency BEP BOP BEBOP
* Motor & Pump Efficiency Motor Efficiency = Mechanical Power / Electrical Power Pump Efficiency = Fluid Power / Mechanical Power Total Efficiency = Pump Efficiency X Motor Efficiency
* Motor & Pump Efficiency Total Efficiency = Pump Efficiency X Motor Efficiency 10 Bags 9 Bags 7 Bags Motor Pump Total 90 % 78 % 70 % 0.90 X 0.78 = 0.70 = 70%
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Wide Efficiency Range *
Narrow Efficiency Range *
Wide Efficiency Range *
Would You Select This Pump? * 38%
Vortex Action *
Vortex vs Non Clog *
* NPSH - Net Positive Suction Head Two Types NPSHr & NPSHa In simple terms, NPSHr is the amount of pressure required at the pump s suction to prevent damaging cavitation. It is a function of pump design.
Relatively Low NPSHr Suction NPSHr @ BEP = 15
Relatively High NPSHr Suction
Eye Diameter Effect on NPSHr Pump Ed 101
Stable Window of Operation Suction Specific Speed Suction Pump Ed 101
Suction Recirculation Cavitation Occurs on the high pressure side of the vane Pump Ed 101 28
Suction Recirculation Cavitation
Radial Thrust A force that acts perpendicularly to the pump shaft Forms about the periphery of the impeller due to uneven volute geometry A function of total head and the width and diameter of the impeller Usually reaches a maximum at or near shut off head
Radial Thrust - Problems Causes Excess Shaft Deflection Increased Seal Wear Increased Wear Ring Wear Increased Radial Bearing Load Vibration Fixes? Increase Shaft Diameter or Shorten Overhang Best Fix Operate at BEBOP
Percent Radial Thrust Radial Thrust versus % BEP Flow Radial Thrust 120 100 80 60 40 20 0 0 20 40 60 80 100 120 140 160 180 200 Percent BEP Flow Pump Ed 101 33
Radial Thrust Calculator
Off BEBOP Flows - Recirculation Three types of recirculation can occur when a pump is operated to the left side of the performance curve. Normal recirculation increases with wear ring clearance & reduced flow. Suction & Discharge recirculation increase as flow is reduced. The resulting recirculation cavitation will cause internal damage over time. Pump Ed 101 38
Wastewater Pump Designs Nonclog Vortex Monovane Chopper Suction
Suction
* Curve Shape The shape and slope of the performance curve can have a significant effect upon pump selection.
Pump Specific Speed * Curve
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Head in Feet * Constant Pressure PRV Control 200 180 160 179 174 167 9.9 HP 155 12.4 HP 140 153 153 151 148 140 140 120 9 HP 100 80 60 40 20 Pump 1 Pump 2 System Low Level HP = (flow x head) / (3960 x eff) 0 0 50 100 150 200 250 300 350 400 Gallons Per Minute
Head in Feet * Pump Pump Down 90 80 70 4.6 6.4 Data Labels Are BHP 60 4.0 6.5 5.9 50 40 6.3 7.0 7.0 30 20 10 Pump 1 Pump 2 System Low Level 0 0 100 200 300 400 500 600 700 Gallons Per Minute
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Parallel Pumps Constant Speed *
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Head in feet Flat Curve 2.5 X 3 X 9 1750 RPM * 100 3 4 5 Data Label values are BHP 90 80 70 2 3 4 5 6 5 7 6 8 9 60 7 50 40 30 60hz 55hz System 20 10 0 0 50 100 150 200 250 300 350 400 Gallons Per Minute
Head in feet 180 4 X 4 X 7B 3450 RPM Steeper Curve * 160 20.3 28.7 30.5 74% 81% Data Labels are BHP 140 14.4 22.1 23.5 33.7 81% 120 100 80 6.4 9.8 16.6 12.1 12.9 17.7 14.2 19.5 25.9 20.7 27.6 35.9 35.6 15.1 60 60hz 55hz 40 50hz 45hz 20 System 0 0 200 400 600 800 1000 1200 1400 Gallons Per Minute
Head in feet * Level Control Pump Power Down Savings 60 Submersible Non Clog S12L - 870 RPM - 14.25" Trim Data Label values are BHP 50 23 40 27 29 31 30 34 33 20 60hz 77% eff 0.010 hp/gal 78% eff 0.009 hp/gal 77% eff 0.007 hp/gal 10 System Low Level 0 0 750 1500 2250 3000 3750 4500 5250 6000 Gallons Per Minute
Head in feet 60 50 Level Control Level Control Power Savings Submersible Non Clog S12L - 870 RPM - 14.25" Trim Data Label values are BHP * 23 40 30 20 10 18 14 10 60hz 55hz 50hz 45hz 12 16 21 27 12 65% eff 13.1 hp 0.009 hp/gal 17 23 29 13 18 76% eff 16.8 hp 0.007 hp/gal 24 14 31 20 78% eff 21.8 hp 0.007 hp/gal 14 26 34 19 78% eff 27.3 hp 0.007 hp/gal 26 33 77% eff 33.2 hp 0.007 hp/gal System 0 0 750 1500 2250 3000 3750 4500 5250 6000 Gallons Per Minute
VFD Control Circulation *
Head in ft Closed Loop Total Friction VFD Control Circulation * 80 70 60 Pipe 600ft 8in Steel Heat Exchanger Heater System Curve 50 40 30 20 10 0 0 200 400 600 800 1000 1200 1400 1600 1800 Gallons Per Minute
Head in Ft 6 X 6 X 12B VFD Control Closed Loop Circulation vf/vp 80 70 60 50 40 30 8.6 hp 86% 44 hz 22.4 hp 87% 60 hz 60hz 55hz 50hz 45hz 40hz 35hz 30hz System 20 10 3.1 hp 85% 31 hz 0 0 200 400 600 800 1000 1200 1400 1600 1800 Gallons Per Minute
Head in Ft * Open Loop Circulation vf/vp 4 X 5 X 9A VFD Control 80 70 60 50 7.5 hp 75% 60 hz 40 30 20 10 1.7 hp 77% 38 hz 3 hp 77% 45 hz 4.9 hp 76% 53 hz 60hz 55hz 50hz 45hz 40hz 35hz 30hz System 0 0 80 160 240 320 400 480 560 640 Gallons Per Minute
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Head in feet * Pump Head vs System Head 250 Cornell 5RB 1780 RPM 13.5" Trim 200 150 100 50 200 195 187 168 164 157 139 135 130 113 110 105 100 124 89 87 83 79 73 68 66 64 61 56 50 49 50 47 45 41 37 31 150 93 25 66 43 178 165 139 115 103 83 70 56 44 34 148 124 105 87 69 56 125 84 100 60hz 55hz 50hz 45hz 40hz 35hz 30hz System Design Pt Data Label values = feet 0 0 500 1000 1500 2000 2500 Gallons Per Minute
Head in feet * Pump Hydraulic Efficiency vs System Head 250 Cornell 5RB 1780 RPM 13.5" Trim 200 150 100 50 60% 72% 80% 84% 60% 72% 86% 80% 84% 86% 60% 72% 86% 80% 84% 86% 60% 86% 72% 80% 86% 83% 84% 86% 60% 72% 83% 80% 86% 84% 86% 60% 83% 72% 74% 80% 86% 84% 86% 83% 74% 60% 72% 86% 80% 84% 86% 83% 74% 86% 83% 74% 74% 83% 74% 74% 60hz 55hz 50hz 45hz 40hz 35hz 30hz System Design Pt Data Label values = Pump Ef 0 0 500 1000 1500 2000 2500 Gallons Per Minute
Head in feet * Pump BHP vs System Head 250 Cornell 5RB 1780 RPM 13.5" Trim 200 150 100 50 42 51 32 40 24 30 18 22 25 12 15 17 8 10 12 13 5 6 7 8 9 59 45 34 39 28 20 22 14 15 10 10 52 31 23 15 10 67 56 42 32 23 15 73 44 32 23 76 59 44 32 59 44 76 59 77 60hz 55hz 50hz 45hz 40hz 35hz 30hz System Design Pt Data Label values = BHP 0 0 500 1000 1500 2000 2500 Gallons Per Minute
Head in feet * Power / 1000 Gallons Pumped 250 Cornell 5RB 1780 RPM 13.5" Trim 200 150 100 50 1.16 0.94 0.82 0.74 0.98 0.79 0.67 0.69 0.62 0.60 0.81 0.66 0.56 0.57 0.51 0.50 0.65 0.46 0.53 0.46 0.42 0.44 0.42 0.38 0.52 0.42 0.36 0.36 0.34 0.33 0.30 0.40 0.30 0.32 0.33 0.28 0.27 0.25 0.23 0.23 0.27 0.29 0.24 0.20 0.20 0.18 0.17 0.18 0.21 0.15 0.13 0.16 0.12 0.53 0.40 0.47 60hz 55hz 50hz 45hz 40hz 35hz 30hz System Design Pt Data Label values = kw / 1000 Gal 0 0 500 1000 1500 2000 2500 Gallons Per Minute
Head in feet * Cost / 1000 Gallons Pumped 250 Cornell 5RB 1780 RPM 13.5" Trim 200 150 100 50 0.116 0.094 0.082 0.074 0.098 0.079 0.067 0.069 0.062 0.060 0.081 0.066 0.056 0.057 0.051 0.050 0.053 0.065 0.046 0.053 0.046 0.042 0.044 0.042 0.038 0.052 0.042 0.036 0.036 0.034 0.040 0.033 0.030 0.040 0.030 0.032 0.033 0.028 0.027 0.025 0.023 0.023 0.027 0.029 0.024 0.020 0.020 0.018 0.017 0.018 0.021 0.015 0.013 0.016 0.012 0.047 60hz 55hz 50hz 45hz 40hz 35hz 30hz System Design Pt Data Label values = $$ / 1000 Gal 0 0 500 1000 1500 2000 2500 Gallons Per Minute
VFD Control Multiple Pumps * 2 Pumps 1 Drive 2 Pumps 1 Drive & Contactors 2 Pumps 2 Drives
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Head in feet * Vertical Multistage (25HP) 300 250 200 150 100 25% 25% 25% 25% 45% 55% 60% 45% 55% 60% 67% 45% 55% 60% 67% 45% 55% 60% 67% 72% 67% 72% 72% 72% 78% 78% 76% 78% Data Label values are Hydraulic Efficiency 76% 78% 76% 76% 60hz 55hz 50hz 45hz System 50 0 0 50 100 150 200 250 300 350 400 450 Gallons Per Minute
Head in feet * Vertical Multistage (25HP) 300 250 200 150 100 25% 25% 25% 25% 45% 55% 60% 45% 55% 60% 67% 45% 55% 60% 67% 45% 55% 60% 67% 72% 67% 72% 72% 72% 78% 78% 76% 78% Data Label values are Hydraulic Efficiency 76% 78% 76% 76% System D60 D55 D50 D45 50 0 0 100 200 300 400 500 600 700 800 900 Gallons Per Minute
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Centrifugal Pump Training Series Centrifugal Pump Selection Joe Evans, Ph.D http://www.pumped101.com http://www.pump-zone.com