KEY FEATURES
- DowFilmtec™ membrane (USA) is the world standard for water purification
- Cleanwater for business – 55 000 liters of water of stable quality per day
- Advanced membrane treatment with high water purity and lowenergy consumption.
- High energy efficiency due to low operating pressure
- Large active surface of the element provides higher productivity
- Automated high-precision production makes it possible to obtain elements with maximum active surface
SPECIFICATION
Technical data
- Nominal active surface – 40.8 m²
- Operating pressure – 8.6 bar
- Permeate volume – 47.7 m³/day
- Stabilized salt rejection – 99.4 %
- Permeate consumption and salt (NaCl) rejection are indicated for the following test conditions: 2 000 mg/L NaCl, 25°C, pH 8, indicated pressure and 15% permeate recovery.
- Flow rates of permeate for every specific element might vary, but will not fluctuate by more than 15% from the indicated values
Operating conditions
- Maximum operating water temperature – 45 °С
- Maximum operating pressure – 41 bar
- Maximum pressure drop – 1.0 bar
- pH range, operational mode – 2…11
- pH range, chemical cleaning mode – 1…13
- Maximum feed silt density index SDI < 5
- Free chlorine tolerance – <0.1 mg/L
Maintenance
Before launch of the reverse osmosis system preliminary preparation of themembrane, refill of the elements, adjustment of the devices and other systemchecks should be performed.
Avoid any major pressure or flow surges inside the spiral-wound elements inthe middle of launch, stop, cleaning etc. to avoid risk of damage infliction tothe membrane. During the launch it is recommended to gradually switch thesystem from standstill to operational mode following the steps:
- gradually increase feed water pressure during 30-60 seconds
- operational rate of the flows should be developed gradually during 15-20 seconds
- permeate obtained within the first hour of operation is discharged
Important information
- After the initial soaking always keep the elements wet.
- To prevent biofouling during long operation breaks it is recommended to submerge the membrane elements into preservative solutions.
Maximum pressure drop along the full length of the housing makes 2.1 bar.