GENERAL THEORY
10
VMT - v. JUNE 2008
3.4
FACTORS AFFECTING PERMEATE PRODUCTION
VARIATIONS IN TEMPERATURE, PRESSURE, AND SALINITY
The following table illustrates how the quality and quantity of permeate produced by a RO system is
affected by changes in temperature, salinity and pressure:
Permeate
With constant....
And increasing....
TDS
Capacity
Salinity and Pressure
Temperature
Increases
Increases
Temperature and Pressure
Salinity
Increases
Decreases
Temperature and Salinity
Pressure
Decreases
Increases
Table 3.1 - Factors Affecting Permeate Quality
The RO system can be adjusted to maintain a constant permeate output when feedwater temperature
and salinity is other than nominal. The operator can do this by controlling system pressure manually via
the backpressure regulation valve located in the system brine piping. As permeate flow decreases, the
operator can throttle the pressure regulation valve closed to increase system pressure. This, in turn,
will increase the permeate output and mitigate the effect of a decrease in temperature or an increase in
salinity. Conversely, the operator can open the pressure regulation valve to reduce pressure and
permeate flow in areas of excessively high temperature or low salinity.
IN FRESH OR BRACKISH FEEDWATER CONDITIONS, MAKE SURE TO REDUCE PRESSURE BY
TURNING REGULATOR. SET PRESSURE SO PRODUCT FLOW IS NO MORE THAN 120% OF
DESIGN FLOW TO AVOID MEMBRANE DAMAGE.
Содержание LW-160
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Страница 33: ...PLUMBING DIAGRAMS 25 VMT v JUNE 2008 9 0 PLUMBING DIAGRAMS...
Страница 34: ...Village Marine Tec Freshwater From the Sea Little Wonder Frame Plumbing Diagram 2008...
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Страница 36: ...Little Wonder Frame Main Parts Reference Village Marine Tec 2008 Freshwater From the Sea...
Страница 37: ...MANUFACTURER S LITERATURE 27 VMT v JUNE 2008 11 0 MANUFACTURER S LITERATURE...
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Страница 41: ...LIST OF TABLES Table 1 Approximate Horsepower Required 3 Table 2 Tool List For Pump Service 12...
Страница 67: ...708 Series High Pressure Titanium Positive Displacement Pump 26...
Страница 68: ...708 1 DRAWINGS...