Puricom Europe PROLINE PLUS, Instruction Manual

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8
2. Introduction
MAXIMUM TDS
OF FEED*
Up to 200 ppm
between 200 and 500 ppm
between 500 and 800 ppm
between 800 and 1200 ppm
between 1200 and 1500 ppm
between 1500 and 1800 ppm
between 1800 and 2000 ppm
MINIMUM PRESSURE OF
FEED TO MEMBRANE**
3.5 bars
3.8 bars
4.0 bars
4.3 bars
4.5 bars
4.75 bars
5.2 bars
*
* The test is carried out with a 50 GPD membrane at 14 ºC, without
counter-pressure, a hardness of 15 ºF and corrected salinity with NaCl.
** The pressure shown is calculated for a production of 6 l/h.
Below 70% the life of the membrane is finished. Using a con-
ductivity metre or a TDS measurer compares the conductivity
of the feed water with that which comes out of the membrane
and obtains the percentage of rejection of salts.
Rejection of salts % = x 100
Conversion factors
PRESSURE (BARS))
0.70
1.00
1.50
1.75
2.50
4.00
4.50
4.90
5.20
5.80
BY PRESSURE
ON PRODUCTION
0.70
0.25
0.33
0.42
0.58
1.00
1.08
1.17
1.25
1.42
REJECTION OF SALTS
(%)
84
88
90
92
93
95
95
95
95
CONVERSION FACTOR
CONVERSION FACTOR
BY TEMPERATURE
TEMPERATURE (ºC)
6
8
10
12
14
16
18
20
22
25
28
30
32
34
ON PRODUCTION
0.38
0.45
0.52
0.59
0.66
0.70
0.77
0.85
0.88
1.00
1.09
1.16
1.23
1.30
The life of the membrane is evaluated by the percentage of
salts rejected.
90 - 95% > MAXIMUM QUALITY
70 - 80% > LOW QUALITY
80 - 90% > MEDIUM QUALITY
Conductivity of R.O. water
1
-
Conductivity of feed water
( )
2.5 The effect of the concentration of salts in the
feed water
The concentration of salts and substances in the water to be
treated influences the capacity of the production of reverse
osmosis water by the system, to such an extent that the great-
er the concentration of salts in the water to be treated, the
greater the pressure that is necessary against the membrane
in order to exceed the natural osmotic pressure and to guar-
antee a minimum flow of reverse osmosis water.
Table of pressure in relation to the TDS