1 Set of 2 Berkey PF-4™ Fluoride and Arsenic Reduction Elements
1 Priming Button used to prepare or prime the Black Berkey Purification Elements and the PF-4™ Fluoride and Arsenic Reduction Elements
The PF-4 Fluoride Filters are manufactured to suit both the Doulton 7" & 5" Super Sterasyl Filter Candles and the Berkey Earth Filter Candles
PF-4 Fluoride and Arsenic Reduction Filters adsorb the following unwanted elements found in drinking water:
Heavy Metal Ions
Herbicides and Pesticides
Made from safe, non-leaching polypropylene #5 that is BPA-free
Sold in a set of 2
PF-4 Fluoride and Arsenic Reduction Filters are designed to be used in conjunction with the Berkey Earth® Elements or the Super Sterasyl™ Ceramic Filter Elements
Attach to the bottom of the Berkey Earth® Elements or the Super Sterasyl™ Ceramic Filter Elements and sit in the lower chamber of the Berkey unit
Number of PF-4s in the bottom chamber must match the number of Berkey Earth® Elements or Super Sterasyl™ Ceramic Filter Elements in the top chamber; for example, 2 Berkey Earth® Elements would require 2 PF-4 Filters
Also for an in depth read of a study carried out by a scientific panel fromEFSA the European Food Safety Authority regarding the safety in use of the activated alumina treatment for the removal of fluoride, ultimately finding that the use of Activated Alumina will not pose a risk to human health. Please Read Here
PF-2/PF-4 Fluoride Reduction Media Information
(Extract from Proprietary Products Data Information Sheets)
Fluoride Reduction Media Definition: The fluoride removal media is the same mineral that rubies and sapphires (corundum) are made from, in crystalline form. The process ‘selective adsorption’ is a physical/ chemical reaction whereby the fluoride ions are removed by binding to the media’s oxidised surface.
The Berkey® Proprietary Fluoride Reduction Media is a new and improved high yield aluminum oxide (corundum) especially formulated for the removal of Fluoride and arsenic from drinking water. This media has an unusually high surface area of more than 350 sq.m./gram of material which allows more efficient removal of the Fluoride and arsenic ions. This high surface area is enhanced by controlled development of the pore size distribution from 30 Angstroms to 100 Angstroms, providing greater accessibility to the surface active sites through bulk diffusion.
Uniform particle size low silica content and high purity, is characteristic of the new and improved Proprietary Fluoride Reduction Media which insures effective operation in the reduction of Fluoride. The extremely low silica content significantly reduces the tendency of the silica to form silicone tetra fluoride which reacts with both the media and the pipes leading to clogging and corrosion problems.
The Proprietary Fluoride Reduction Media is an EPA approved method for removing Fluoride from drinking water. This product can be used in various filtration products and can also be packed in large columns for high volume applications including drinking water treatment plants and waste treatment plants. The Proprietary Fluoride Reduction Media can be used in various applications where defluorination is necessary.
For maximum removal efficiency, maintain the water being treated between a PH level of 5-7. The media can be regenerated for enhanced performance lifetime with many applications. This makes the Proprietary Fluoride Reduction Media the most effective and economical defluorination product on the market.
TYPICAL PHYSICAL PROPERTIES OF PROPRIETARY FLUORIDE REDUCTION MEDIA:
Surface Area, sq. m/g. 350
Total Pore volume, cc./g. .55
Aluminum Oxide XRD Phase Chi, Gamma, Amorphous
Crush Strength, lbs (kg) 30 (14)
Abrasion Loss wt% 0.1 Bulk
Density, lbs/cu. ft (kg/cu. m) 47 (750)
TYPICAL CHEMICAL PROPERTIES OF PROPRIETARY FLUORIDE REDUCTION MEDIA:
The Proprietary Fluoride Reduction Media has been specially prepared to optimize the media for more efficient removal of the Fluoride ion. Testing of the material is important for each application as influent water PH, quality and purify of the water and various metal ion concentrations are all variables which influence the effectiveness of the media. Note that the material is most efficient between a PH of 5 and 7.
Testing for fluoride removal was based on 20-30 ppm of the ion in the influent aqueous solution at a flow rate of no more than 3 gpm per cubic foot (25kg) of media. Results of < 1 ppm of the fluoride ion in the effluent were typical for the media. Under optimum conditions, effluent concentrations of less than 50 ppb of Fluoride ion were found to be readily achieved. Results may vary significantly with each particular application.
1. Calcium & Sodium Fluoride. The Proprietary Fluoride Reduction Media will remove any types of inorganic fluoride salts. All fluoride salts are soluble in water. So it does not matter what fluoride salts that are in the water, fluoride is present as an anion where the media will absorb fluoride ions in water.
2. Hydro-Fluorosilicic Acid (HFS). We do not have any test data to show how efficient the Proprietary Fluoride Reduction Media will remove hydro-fluosilicic acid. But by adsorption of fluoride anion using alumina, we believe the media will remove hydro-fluosilicic acid better than fluoride. The reason is both compounds are ions with negative charges. The molecular size of hydrofluosilicic acid is much larger than the fluoride ion and hydrofluosilicic acid has two negative charges where as fluoride has only one negative charge. So this negative charge makes hydrofluosislicic acid much easier to adsorb to the media compared to regular fluoride ions.
3. NMCL obtains its Proprietary Fluoride Reduction Media from a third party that manufactures specialized media that targets difficult to remove contaminates, such as Fluoride and Arsenic. The above information provided has been extracted from the supplier’s data sheets and other written communications.