SpectraPure
®
Inc
.
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17
SpectraPure
®
Membrane Output Calculation Example
What is the expected GPD from a 100 GPD System at 40 psi pressure
and 60°F water temperature?
PCF = 40 ÷ 60 = 0.666
TCF = 0.754 (from Table on previous page)
Expected GPD = 100 × 0.666 × 0.754 = 50.2 GPD ± 20%*
50.2 GPD would be the Actual Production Rate
*Membrane manufacturers state their flow ratings with a ± 20% variance.
TIPS FOR LONG MEMBRANE LIFE:
1. Replace the sediment filter at least once every 6 months. This will
prevent mem brane fouling due to silt or sediment depositing on the
membrane.
2. Replace the carbon block filter at least once every 6 months or when
chlorine breakthrough occurs. This will ensure good membrane life
and protect the membrane from chlorine damage.
3. Membrane should not be operated at lower than the minimum 2:1
concentrate to purified water ratio.
4. Operating reverse osmosis systems on softened feed water greatly
reduces the chances of membrane fouling and extends the life of the
RO Membrane.
MEMBRANE PRODUCTION CALCULATION: (cont.)
