1. Thermally Bonded (Melt Blown) Polypropylene Filter Cartridges
Water Tech
Thermally Bonded (Melt Blown)
Polypropylene Filter Cartridges

2. Water Tech Thermally Bonded Filter Cartridges
Advantages vs. String Wound:
Higher Capacity
Graded Density
No Surface Blinding
Less Fouling
No Fiber Unloading
No Chemical Leaching
Higher Flow Rate
Low Pressure Drop
Superior Structure
Cost Effective
Sedifilt filters are made of polypropylene, a recognized environmentally safe and recyclable material for purity and ease of disposal. Polypropylene incinerates to trace ash with no hazardous volatiles for environmentally friendly disposal.

3. Water Tech Thermally Bonded Filter Cartridges
Higher Capacity:
Graded Density
Denser inner layers, more lower density outer layers.
No Surface Blinding
Particles trapped throughout cross-section of filter.

4. Water Tech Thermally Bonded Filter Cartridges
Less Fouling:
No Fiber Unloading
Made of continuous melt-blown filaments.
No fibers migrate to RO.
No Chemical Leaching
No chemicals used in melt blown process.
No downstream foam in filtrate.
Higher Dirt Holding Capacity
5 micron 10” (Example)
Dirt Holding Capacity
Typical String Wound
30-55 gm
Water Tech Thermally Bonded
108 gm

5. Water Tech Thermally Bonded Filter Cartridges
Higher Flow Rate:
Low Pressure Drop
Three-dimensional, rigid, low pressure structure.
Improved solid to void ratio for higher flow rates with low pressure drop.
Superior Structure
100% pure polypropylene homo-polymer
Polypropylene core
Wide chemical compatibility.
Excellent micro-organism resistance.
Excellent end sealing.
Easy disposal, incinerates to trace ash.

6. Water Tech Thermally Bonded Filter Cartridges Performance Data:
Test Method: Retention Efficiency and Capacity per ASTM F795 Instrumentation: LD 400 SN
Fluid: Water Temperature: Ambient Contaminant: ISO Fine Test Dust
Test Method: Water at ambient temperature (25 °C.) Flow in US gallons per minute
Test Method: Efficiency and Capacity per ASTM F Instrumentation: LD 400 SN
Fluid: Water Temperature: Ambient Contaminant: ISO Fine Test Dust

7. Water Tech Thermally Bonded Filter Cartridges
Cost Effective:
Less RO fouling
Less labor requirement
Less equipment downtime

8. Water Tech Thermally Bonded Filter Cartridges
Applications:
RO Pretreatment (SDI Reduction)
Drinking Water and Beverage Processing
Sea Water Desalination
Deep Well Injection
Gas Purification
Cooling Tower Water Filtration
Electronics and Electroplating
Industrial Process Water
Pharmaceutical & Healthcare
Chemical Industry
ED Automotive Paint
Photographic Solutions
Wastewater Disposal
And more …

9. Conventional String Wound Filter Cartridges
Problems with Conventional String Wound Media:
Fiber Unloading
Short fibers not properly or fully locked into main body.
Fibers come loose and migrate to RO or filtrate.
Loose fiber ends clearly seen in spiral wound yarn media.
Chemical Leaching
String Wound yarn finish chemicals (lubricants, surfactants, antistatic agents, emulsifiers, bactericides, etc.) leach out.
Can cause foaming in filtrate.
Surface Blinding
Low Dirt Holding Capacity
Typically Higher Pressure Drop
String Wound Yarn Media