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1.5.1.
Feed Water Specifications
The feed water requirements stated in the following table must be met to ensure
quality permeate and extended membrane element life.
Table 2.
Feed Water Requirements
Temperature
Inlet Pressure
Chlorine (continuous feed) 0 ppm
Operating pH
Silt Density Index (SDI)
1.5.2.
Permeate Flow Rate
Stated in Table 1 above and on the machine serial number label (assumes no
permeate backpressure, 2000mg/L TDS maximum feed concentration, and rated
temperature).
To estimate permeate output with backpressure, use the formula below:
Maximum permeate backpressure is 80 psig (5.5 bar).
(Permeate
Flow
on
Label)
1.5.3.
Concentrate Flow Rate
Stated in Table 1 and factory set as stated on serial number label.
1.5.4.
Operating Final Pressure
Minimum - 200 psig (13.8 bar)
Maximum - 235 psig (16.2 bar)
1.5.5.
Pump
Multi-stage centrifugal; approximate primary operating pressure of 190 psig (13.1
bar) excluding line pressure.
E4H Series
Operation & Maintenance Manual
Typical: 50-85°F (10-29°C)
Maximum: 32-104°F (0-40°C)
Minimum 30 psig (2.1 bar)
Maximum 60 psig (4.1 bar)
For soft water (less than 1 grain per gallon (gpg) or 17
mg/L hardness), acceptable pH is 4.0-11.0.
For unsoftened water (contact factory with water
analysis, acceptable pH is 5.5-6.0.
For short term (cleaning) a pH range of 2-12 is
acceptable.
Less than or equal to 3 to minimize membrane fouling
and extend cleaning intervals. Refer to ASTM standard
D4189.
(Operating
Pressure)
×
(Operating
-
(Permeate
Backpressu
Pressure)
re)
11
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