Cartridge filters - Technol
Technol GRP cartridge filters = the optimal corrosion free solution
General Questions
What are cartridge filters used for in desalination systems?
Cartridge filters are primarily used as pre-filtration units in desalination plants, especially before reverse osmosis (RO) membranes. Their main function is to remove fine suspended particles and protect sensitive downstream equipment.
Why are cartridge filters important in desalination?
- In desalination systems, cartridge filters serve as a critical barrier that prevents:
- Membrane fouling
- Membrane clogging
- Performance loss in RO systems
They ensure stable operation and extend the lifespan of membranes.
What filtration accuracy is required for desalination?
Typical cartridge filters used in desalination operate in the range of 1–50 microns, depending on system design and water quality requirements.
Performance & Operation
Are cartridge filters suitable as primary filtration systems?
No, cartridge filters are not designed for high solids loads or primary filtration. They are used as a final polishing step after media filtration (e.g., sand or multimedia filters).
How often are cartridges replaced in desalination systems?
- Replacement depends on:
- Feed water quality
- Pre-treatment efficiency
- Operating conditions
In desalination plants, cartridges are typically replaced regularly to maintain consistent pressure drop and protect membranes.
What are the advantages of cartridge filters in desalination?
- High filtration precision
- Protection of RO membranes
- Compact design
- Reliable and predictable filtration performance
Why are cartridge filters used before RO membranes?
RO membranes are highly sensitive to fouling. Cartridge filters act as a safety barrier, removing fine particles that could damage or reduce the efficiency of the membranes.
Does Technol supply cartridge filters?
Yes, we produce horizontal and vertical cartridge filters, which can be integrated as part of a complete water treatment system, particularly in desalination and industrial applications where membrane protection is required.
How do cartridge filters fit into a complete filtration system?
A typical system includes:
- Primary filtration (e.g., sand or multimedia filters)
- Secondary filtration (optional advanced systems)
- Cartridge filtration (final polishing before membranes)
This multi-stage approach ensures maximum reliability and performance.
Technol designs and manufactures GRP vertical and horizontal cartridge filters for water treatment.
Advantages:
- FRP as a material provides superior chemical resistance to wide range of fluids and it is ideal for aggressive saline environments.
- FRP housing offers low maintenance cost and fast repairs in case of damages.
- Custom designs are available.
- No metal parts in the vessels.
HORIZONTAL – HIGH FLOW CARTRIDGE FILTERS
Features:
- Design according EN13121/ASME X/BS4994/AD Merkblatt
- Versatility in design for different pressures.
- All Technol products come with vinylester liner for enhanced chemical resistance
- Fixed flange connections
- Opening portal with davit
- On GRP support legs
- Body and plate out of GRP
- Bolts: stainless steel
- Working pressure 6 bar
Advantages:
- Fast cartridge replacement
- Horizontal layout suitable for containerized RO plants
- Compact housing
- 40 or 60-inch cartridge installation.
Cartridges:
- High flow cartridges; inside to outside flow direction elements
- Standard micron rating: 5µ
- Recommended flow rates 36 m3/h
- differential pressure 2 bar.
- Outer diameter 6 Inches
- Length: 40 or 60 inches
- Filter media: plated polypropylene
- Outer support: polypropylene
- Gaskets: EPDM
| Model | Number of elements | Flow rate m3/h | Lenght [mm] | H [mm] | B1 [DN] | B2 [DN] | C1/C2 [DN] |
| DN | |||||||
| 500 | 5 | 165 | 2200 | 820 | 50 | 40 | 200 |
| 600 | 7 | 231 | 2220 | 920 | 50 | 40 | 200 |
| 800 | 12 | 396 | 2450 | 1120 | 50 | 50 | 250 |
| 1000 | 20 | 660 | 2850 | 1350 | 80 | 50 | 350 |
| 1200 | 28 | 924 | 3070 | 1550 | 80 | 50 | 400 |
| 1400 | 37 | 1221 | 3300 | 1750 | 80 | 50 | 450 |
| 1600 | 48 | 1584 | 3520 | 1950 | 80 | 50 | 500 |
6 Bar working pressure; Different dimensions/flows/pressures on request
VERTICAL CARTRIDGE FILTERS
Features:
- Designed to ASME X/EN13121/BS4994 code
- Versatility in design for different pressures.
- All Technol products come with vinylester liner for enhanced chemical resistance
- Fixed flange connections
- Opening portal with davit (slika od vertikalnega)
- Working pressure 6 bar
- Internal parts are made from corrosion free materials.
- Inlet can be positioned on the side or on the bottom
- (Possible with double flange layout)
Cartridges:
- Outside to inside flow direction
- Standard micron rating: 5µ
- Recommended flow rates 7.2m3/h
- differential pressure 1.5bar.
- Length: 40inch
- Configuration: With spring
Datasheet for vertical cartridge filters
| Model | Number of elements | Flow rate m3/h | A [mm] | B [mm] | C [mm] | H [mm] | L [mm] | B1 [DN] | C1/C2 [DN] |
| DN | |||||||||
| 800 | 29 | 208.8 | 650 | 1480 | 1600 | 2350 | 500 | 40 | 250 |
| 1000 | 50 | 360 | 650 | 1530 | 1650 | 2400 | 600 | 40 | 250 |
| 1200 | 68 | 489.6 | 775 | 1705 | 1750 | 2625 | 700 | 50 | 350 |
| 1300 | 86 | 619.2 | 850 | 1805 | 1800 | 2750 | 750 | 80 | 350 |
| 1400 | 105 | 756 | 850 | 1830 | 1850 | 2800 | 800 | 80 | 400 |
| 1600 | 145 | 1044 | 950 | 1980 | 1950 | 3000 | 900 | 80 | 400 |
6 Bar working pressure; Different dimensions/flows/pressures on request
