2.5
Pre-filtering
Process of Micron Filtration
These are pressure vessels filtered internally with pleated/PP cartridge elements of 5/20
microns rating, which removes micron - sized particles. the imported filter housing is made
for food grade NSF material and it can be opened easily for cleaning of cartridge filter.
A 5/20 - micron spun polypropylene pre-filter cartridge is used to protect the membranes and
controls from particles which may be in the inlet feedwater. The cartridge should be removed
every 4 to 6 months and replaced if plugged. Contact Hi-tech office or your Distributor for
pre-filters.
Note :
The machine must be operated on filtered water
only.
3.0
OPERATION SPECIFICATIONS
3.1.
Osmonics
Table 1 - Membrane Operating Parameters
Salt Rejection
Membrane
Monovalent Ions:
96%
Polyvalent Ions:
98%
Suspended Matter Rejection:
99+%
Bacteria Rejection:
99+%
Pyrogen Rejection:
99+%
Organic Rejection:
99+%
1
>150 MV
pH Range:
5.5-10.0
Continuous Free Chlorine:
Short-term exposure to 0.2 mg/L
2
Continuous exposure less than 0.1 mg/L
Slit Density Index:
<5
Iron Concentration:
0.2 mg/L
1
MV indicates Molecular Weight. (Normal cutoff point for rejection of saccharide-type
molecules larger than the stated molecular weight)
2
Chlorine tolerance is very pH-dependent. Increased tolerance is likely where feedwater pH is
7.0 or lower.
3.2
Feedwater Specifications
Membrane
0
0
0
0
Temperature:
Minimum 35 F (2 C)
Maximum 85 F (29 C)
Inlet Pressure:
Minimum 30 psi (2.1 bar)
Maximum 60 psi (4.1 bar)
™/Filmtek™ membranes are used in RO machines.