Table of Contents
Advertisement
SpectraPure
MEMBRANE OUTPUT CALCULATION:
Membranes produce the rated gallons per day (GPD) at 60 psi (4.1 bars)
operating pressure, 77°F (25°C) operating temperature and no more than
500 ppm total dissolved solids.
Membrane output gallons per day (GPD) depends on operating pressure, water
temperature and the TDS in the feed water.
Expected GPD = Rated GPD × PCF × TCF
PCF is the pressure correction factor
TCF is the temperature correction factor
Calculation of Pressure Correction Factor (PCF):
the membrane is directly proportional to the applied pressure.
Note: The membrane is rated to produce the rated GPD at 60 psi. For any pres-
sure other than 60 psi the output GPD is multiplied by the PCF.
PCF = Line Pressure (in psi) ÷ 60
Calculation of Temperature Correction Factor (TCF):
(GPD) decreases with a decrease in temperature. This is because water viscosity
increases with a decrease in water temperature.
Temperature Correction Factor Table (TCF)
°F /°C
TCF
41.0 /5
0.521
42.8 /6
0.540
44.6 /7
0.560
46.4 /8
0.578
48.2 /9
0.598
50.0 /10
0.620
51.8 /11
0.640
53.6 /12
0.661
55.4 /13
0.684
57.2/14
0.707
SpectraPure®Inc .
E-mail: spectra@spectrapure.com Visit us on the web www.spectrapure.com
®
°F \°C
TCF
59.0 /15
0.730
60.8 /16
0.754
62.6 /17
0.779
64.4 /18
0.804
66.2 /19
0.830
68.0 /20
0.857
69.8 /21
0.884
71.6 /22
0.912
73.4 /23
0.941
75.2 /24
0.970
Fax 480.894.6109 Fax us toll-free 1.877.527.7873
The output (GPD) from
The output
°F \°C
TCF
77.0 /25
1.000
78.8 /26
1.031
80.6 /27
1.063
82.4 /28
1.094
84.2 /29
1.127
86.0 /30
1.161
87.8 /31
1.196
89.6 /32
1.232
91.4 /33
1.267
93.2 /34
1.304
19
Advertisement
Table of Contents
Troubleshooting
Need help?
Do you have a question about the The Eliminator and is the answer not in the manual?
Questions and answers