SYSTEM PERFORMANCE 5
Rev C
SYSTEM PERFORMANCE
THE MERLIN SWEET SPOT
The Merlin uses a new, patented membrane element technology that
provides flow rates up to five times greater than standard home RO
membranes. The membrane element is designed to work from 40-80 psi
(2.7-5.5 bar) inlet water pressure and 40-100°F (4.4-37.8°C) water
temperature. The Merlin performs better as pressure and temperature
increase. Ideally, pressures will be higher than 50 psi (3.4 bar) and
temperatures will be higher than 50°F (10°C). Figure 2 represents the
application conditions recommended for the Merlin system.
Figure 2
Flow Rates
Factors that directly affect flow performance from the Merlin include:
• Net driving pressure (NDP)
• Inlet water temperature
• Inlet water conductivity (TDS)
• Installation factors
An understanding of these factors and how they affect flow is critical for
maximizing the Merlin’s performance. To estimate Merlin’s performance,
follow these steps:
1. Determine inlet TDS.
2. Determine inlet water temperature.
3. Determine net driving pressure.
4. Consult Table 1 for estimated flow.
40 50 60 70 80 90
100
90
80
70
60
50
40
Pressure at Inlet (psi)
Degrees Fahrenheit
Red
Ye l l o w
Green
Orange
Red - will require an inlet booster
pump. See page 11.
Ye l l o w - may require an inlet booster
pump. See page 11.
Green - Merlin should work well with
these conditions.
Orange - application in high
pressure/high temperature
installations may result in
reduced element life.
37.8
32.2
26.7
21.1
15.6
10
4.4
Degrees Celsius
2.8 3.5 4.1 4.8 5.5 6.2
Pressure at Inlet (bar)
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