Eductors
swtwater.com Fluid Eductors
540 Series
540 Series Fluid Eductors are constructed of corrosion resistant PVC and specifically designed for water treatment applications. The eductor cartridge is chemically bonded inside the housing for years of trouble-free service. For optimum performance, eductors should be installed with a section of the straight pipe extending from the discharge area.
SWT's 540 Series Eductors
TECHNICAL SPECIFICATIONS
Min./max. operating pressure: 20 to 125 psi (1.37 to 8.6 bars)
Operating temperature up to 140°F (60°)
CONNECTIONS
Available with FNPT ends and U.S. Standard socket weld ends
 
 
PRODUCT DIMENSIONS
Series 540 Eductor FNPT Dimensions Series 540 Eductor Socket Dimensions
FNPT Dimensions Socket Dimensions
 
Part
Number
Connection Size
(Inches)
Dimensions (Inches/mm)
"A" "B" "C" "D" "E"
QA-540-# * 0.5 FNPT 1.37 / 35 2.75 / 70 1.31 / 33
QA-540S-# * 0.5 Socket 1.37 / 35 2.75 / 70 1.31 / 33 0.88 / 22
QA-541-# * 0.75 FNPT 1.72 / 44 3.44 / 88 1.50 / 38
QA-541S-# * 0.75 Socket 1.72 / 44 3.44 / 88 1.56 / 40 1.00 / 25
QA-542-# * 1.0 FNPT 1.72 / 44 3.44 / 88 1.81 / 46
QA-542S-# * 1.0 Socket 1.88 / 48 3.75 / 96 1.81 / 46 1.13 / 20
QA-544-# * 1.5 FNPT 2.09 / 53 4.19 / 106 5.25 / 133 2.38 / 60
QA-544S-# * 1.5 Socket 2.38 / 60 4.75 / 120 5.63 / 143 2.38 / 60 1.38 / 35
QA-546-# * 2.0 FNPT 2.78 / 71 5.56 / 142 6.63 / 168 3.00 / 76
QA-546S-# * 2.0 Socket 2.78 / 71 5.56 / 142 6.63 / 168 3.06 / 78 1.50 / 38
* Substitute nozzle number for "#" (see second row of Performance Tables below).
Examples: QA-540-3 is 1/2 inch FNPT red code eductor. QA-544S-5 is 1-1/2 inch socket orange code eductor.
 
 
PERFORMANCE TABLES
Data based on: 1. Water media specific gravity 1.0 3. Discharge head 0 ft. (0 meter)
2. Suction lift 3 ft. (1 meter) 4. Media temperature 60°F (15°C)
Model 540 — 1/2 Inch Connections
Inlet
Pressure
(PSI / Bars)
Nozzle Flow Rate (GPM / LPM) Draw
Factor
540-1
Black
540-2
Brown
540-3
Red
540-4
White
540-5
Blue
20 / 1.37 0.13 / 0.52 0.18 / 0.73 0.31 / 1.22 0.62 / 2.44 0.90 / 3.50 0.80
30 / 2.06 0.16 / 0.60 0.23 / 0.84 0.38 / 1.42 0.76 / 2.82 1.10 / 4.00 0.78
40 / 2.75 0.19 / 0.74 0.26 / 1.00 0.44 / 1.74 0.88 / 3.50 1.20 / 4.90 0.82
50 / 3.44 0.21 / 0.86 0.29 / 1.20 0.49 / 2.02 0.98 / 4.00 1.40 / 5.70 0.83
60 / 4.13 0.23 / 0.91 0.32 / 1.27 0.54 / 2.14 1.10 / 4.20 1.50 / 6.08 0.85
70 / 4.82 0.25 / 0.96 0.35 / 1.34 0.58 / 2.25 1.20 / 4.40 1.65 / 6.40 0.88
80 / 5.51 0.27 / 1.05 0.37 / 1.47 0.62 / 2.47 1.30 / 4.90 1.80 / 7.00 0.85
100 / 6.9 0.30 / 1.13 0.42 / 1.60 0.70 / 2.66 1.40 / 5.20 2.00 / 7.50 0.83
120 / 8.27 0.33 / 1.21 0.46 / 1.70 0.76 / 2.84 1.50 / 5.60 2.20 / 8.10 0.80
Nozzle Dia. 0.038 0.042 0.052 0.070 0.086
Throat Dia. 0.076 0.086 0.104 0.140 0.172
 
Model 541 — 3/4 Inch Connections
Inlet
Pressure
(PSI / Bars)
Nozzle Flow Rate (GPM / LPM) Draw
Factor
541-1
Red
541-2
White
541-3
Blue
20 / 1.37 1.07 / 4.30 1.80 / 7.20 2.90 / 11.2 1.15
30 / 2.06 1.30 / 4.90 2.10 / 8.30 3.50 / 13.0 1.20
40 / 2.75 1.50 / 6.00 2.50 / 10.2 4.00 / 16.0 1.26
50 / 3.44 1.70 / 7.00 2.80 / 11.8 4.50 / 18.4 1.25
60 / 4.13 1.80 / 7.40 3.10 / 12.5 4.90 / 19.5 1.15
70 / 4.82 2.00 / 7.80 3.30 / 13.1 5.30 / 20.5 1.08
80 / 5.51 2.15 / 8.50 3.60 / 14.4 5.70 / 22.5 1.00
100 / 6.9 2.40 / 9.20 4.00 / 15.5 6.40 / 24.3 0.95
120 / 8.27 2.60 / 9.80 4.30 / 16.6 7.00 / 26.0 0.90
Nozzle Dia. 0.098 0.125 0.157
Throat Dia. 0.196 0.250 0.312
 
Model 542 — 1 Inch Connections
Inlet
Pressure
(PSI / Bars)
Nozzle Flow Rate (GPM / LPM) Draw
Factor
542-1
Red
542-2
White
542-3
Blue
20 / 1.37 4.40 / 17.3 5.80 / 22.0 8.20 / 31.7 1.04
30 / 2.06 5.40 / 20.0 7.10 / 25.0 10.0 / 36.0 0.94
40 / 2.75 6.20 / 24.5 8.20 / 31.0 11.7 / 45.0 0.95
50 / 3.44 7.00 / 28.4 9.20 / 36.0 13.0 / 52.0 0.85
60 / 4.13 7.60 / 30.0 10.0 / 38.0 14.4 / 55.0 0.82
70 / 4.82 8.20 / 31.6 10.8 / 40.0 15.5 / 58.0 0.80
80 / 5.51 8.70 / 34.8 11.6 / 44.0 16.6 / 63.0 0.78
100 / 6.9 9.80 / 37.5 13.0 / 47.5 18.5 / 68.5 0.75
120 / 8.27 10.7 / 40.0 14.2 / 50.7 20.0 / 73.0 0.70
Nozzle Dia. 0.188 0.219 0.250
Throat Dia. 0.375 0.438 0.500
 
Model 544 — 1-1/2 Inch Connections
Inlet
Pressure
(PSI / Bars)
Nozzle Flow Rate (GPM / LPM) Draw
Factor
544-1
Red
544-2
White
544-3
Blue
544-4
Yellow
544-5
Orange
20 / 1.37 8.70 / 34.2 13.4 / 52.5 17.0 / 66.0 21.0 / 83.0 24.5 / 97.6 1.08
30 / 2.06 10.6 / 39.5 16.4 / 60.0 20.7 / 76.0 25.7 / 96.0 30.0 / 112 1.12
40 / 2.75 12.3 / 48.4 19.0 / 74.4 24.0 / 93.4 29.7 / 117 34.7 / 138 1.16
50 / 3.44 13.8 / 58.0 21.2 / 86.0 26.8 / 108 33.2 / 136 38.8 / 160 1.15
60 / 4.13 15.0 / 59.3 23.0 / 91.0 29.5 / 114 36.3 / 144 42.5 / 170 0.95
70 / 4.82 16.3 / 62.0 25.0 / 96.0 31.8 / 120 39.3 / 152 46.0 / 178 0.90
80 / 5.51 17.4 / 68.0 27.0 / 105 34.0 / 132 42.0 / 166 49.0 / 195 0.80
100 / 6.9 19.5 / 74.0 30.0 / 113 38.0 / 142 47.0 / 180 55.0 / 210 0.80
120 / 8.27 21.3 / 78.0 32.8 / 120 41.5 / 152 51.5 / 190 60.0 / 225 0.75
Nozzle Dia. 0.281 0.312 0.359 0.406 0.438
Throat Dia. 0.562 0.625 0.719 0.812 0.875
 
Model 546 — 2 Inch Connections
Inlet
Pressure
(PSI / Bars)
Nozzle Flow Rate (GPM / LPM) Draw
Factor
546-1
Red
546-2
White
546-3
Blue
546-4
Yellow
546-5
Orange
20 / 1.37 29.5 / 116 35.7 / 140 28.4 / 152 45.0 / 178 52.0 / 207 1.08
30 / 2.06 36.0 / 134 43.7 / 162 47.0 / 176 55.0 / 205 64.0 / 240 1.12
40 / 2.75 41.7 / 164 50.0 / 198 54.0 /216 64.0 / 252 74.0 / 294 1.16
50 / 3.44 46.6 / 190 56.5 / 230 61.0 / 250 71.4 / 292 83.0 / 340 1.15
60 / 4.13 51.0 / 200 62.0 / 244 66.5 / 265 78.0 / 310 91.0 / 360 0.95
70 / 4.82 55.0 / 212 67.0 / 256 71.0 / 278 84.5 / 325 98.0 / 380 0.90
80 / 5.51 59.0 / 232 71.0 / 280 77.0 / 306 90.0 / 357 106 / 416 0.80
100 / 6.9 66.0 / 250 80.0 / 300 86.0 / 330 100 / 385 118 / 445 0.80
120 / 8.27 72.0 / 268 87.0 / 325 94.0 / 350 110 / 410 130 / 480 0.75
Nozzle Dia. 0.469 0.500 0.547 0.578 0.625
Throat Dia. 0.938 1.000 1.094 1.156 1.250
 
 
EFFICIENCY GRAPH SPECIFIC GRAVITY TABLE
540 Series Eductors Efficiency Graph
Fluid Specific
Gravity
Hydrochloric Acid (30%) 1.14
Saturated Brine (NaCl) 1.2
Sodium Hydroxide (25%) 1.16
Sodium Hydroxide (50%) 1.52
Sulphuric Acid (20%) 1.13
 
 
TO CALCULATE DRAW RATE
Where A = Nozzle Flow Rate; B = Draw Factor; C = Efficiency Factor; D = Specific Gravity
DRAW RATE = (A x B x C) ÷ D
Example: Find draw rate for 30% hydrochloric acid at inlet pressure of 60 psi and back pressure of 5 psi for 1 inch blue code eductor.
From Performance Tables: At 60 psi, Model 542-3 (blue code)
A = Nozzle Flow Rate = 14.4 gpm
B = Draw Factor = 0.82
From Efficiency Graph: C = 5 psi back pressure @ 60 psi inlet pressure = 74%
From Specific Gravity Table: D = Specific Gravity of 30% Hydrochloric Acid = 1.14
Draw Rate = (14.4 x 0.82 x 0.74) ÷ 1.14 = 7.66 gpm
 
 
 
Safe Water Technologies, Inc.
996 Bluff City Boulevard
Elgin, IL 60120 USA
 
 
Telephone: +1.847.888.6900
Facsimile: +1.847.888.6924
E-mail: info@swtwater.com
http://www.swtwater.com

Last Updated: August 16, 2016