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Raw Water (Feed Water) Requirements
Raw water quality, pressures, and flow rates have a significant impact on the performance of any
reverse osmosis system. To ensure reliable and consistent long-term performance, it is important to
supply feed water having the minimum specifications detailed below. If your raw water supply is
marginal, you should consider using a raw water break tank and booster pump to supply the system.
KSRO Raw Water Specifications (minimum)
Hardness
< 5 ppm
Hydrogen Sulphide 0 ppm
Free Chlorine
0 ppm
Manganese
< 0.05 ppm
Total Dissolved Solids < 1000 ppm
Organics
< 1 ppm
Turbidity (SDI)
< 5
Temperature
+5 to +40°C
pH
3-11
Silica
< 1.0 ppm
Iron
< 0.01 ppm
Pressure
>240 kPa
These specifications should be met in order to have the reverse osmosis system perform optimally. All
operation specifications are based on the test conditions listed below.
KSRO RO Operation Specifications
Min. Working
Pressure
35 psi (240kPa)
Max. Pressure
250 psi (1700 kPa)
Min. NaCl %
Rejection
96%
Max. NaCl %
Rejection
99%
Min. Feed (lpm)
34
Max. Feed (lpm)
50
Max. Hardness
1.0 ppm
pH Range
3 – 11
Max. TDS
1,000 ppm
Max. Temperature
40°C (105°F)
TEST CONDITIONS: Permeate flow and salt rejection based on 1500 ppm NaCl, 1034kPa (150psi), 77°F
(25°C), pH 6.5-7.0, and recovery of 15%.
NOTE: Higher TDS and/or lower temperatures will reduce the system’s production
