Reverse Osmosis Membrane Operating Conditions and Performance Data

Definitions of Abbreviations:
CTA - cellulose tri-acetate - membrane is chlorine tolerant
TFC - thin film composite - not chlorine tolerant but has a higher production capacity
psi  - pounds per square inch
TDS - total dissolved solids
mg/L - miligrams per liter
gpg - grains per gallon
NTU - nephelometric turbidity units

   Non-Chlorinated
   30 – 100 psi
   4° – 38° C (40° – 100° F)
   3.0 – 11.0
    2000 mg/L
< 1.0 Net Turbidity (NTU)

Chemical Parameters – TFC

Hardness (CaCO3)
Iron (Fe)
Manganese (Mn)
Hydrogen Sulfide (H2S)
Chlorine (Cl2)

< 350 mg/L (<20gpg)
< 01 mg/L
< 0.05 mg/L
   0.00 mg/L
   0.00 mg/L

Source Water Supply – CTA

Community/Private
System Pressure
Temperature
pH Range
Maximum Supply TDS Level
Turbidity

  Chlorinated
   30 – 100 psi
   4°– 32° C (40° – 90° F)
   4.0 – 8.0
   1500 mg/L
< 1.0 Net Turbidity (NTU)

Chemical Parameters – CTA

Hardness (CaCO3)
Iron (Fe)
Manganese (Mn)
Hydrogen Sulfide (H2S)
Chlorine (Cl2)

< 350 mg/L (<20 gpg)
< 0.1 mg/L
< 0.05 mg/L
   0.00 mg/L
   0.1 – 10.0 mg/L

Performance Data:

Typical Rejection Characteristics
of Reverse Osmosis Membranes

92-96%
95-98%
95-98%
94-98%
85-92%
84-92%
85-92%
94-98%
95-98%
94-98%
94-98%
95-98%
96-98%
60-75%
96-98%
85-95%
94-96%
85-94%
96-98%
96-98%

Find out more information on Reverse Osmosis Systems and how they work!