Parts & Components
Filteration Media

Sand and Gravel
Filter Sand and Gravel are naturally occurring, river washed, glacial deposit products. Their excellent chemical properties - high silica content and low soluble calcium, magnesium and iron compounds meet specifications. Precision sizing and uniform grading to close limits meet the rigid specifications of professional engineers throughout the world.

ADVANTAGES
• Filter Sand is graded specifically for water filtration plants.
• Filter Sand can be used in municipal, industrial or residential applications.
• The spherical shape of uncrushed gravel promotes good flow and even distribution.

 

 

Activated Carbon
Granular activated carbon is designed for reduction of tastes, odors and dissolved organic chemicals from municipal and industrial water supplies. Manufactured in the United States from select grades of bituminous coal to produce a high density, durable granular product capable of withstanding the abrasion and dynamics associated withrepeated hydraulic transport, backwashing and mechanical handling. Activation is carefully controlled to produce exceptionally high internal surface area with optimum pore size for the adsorption of a broad range of high and low molecular weight organic contaminants.

ADVANTAGES
• GAC is an outstanding material for applications requring taste, odor and dissolved organic chemical removal from water with suspended matter present.
This product can be used for fi ltering waters having a wide range of pH levels.
• Large surface area results in an exceptionally high capacity and effi ciency.
• Balanced pore structure gives a more effi cient adsorbtion range.
• GAC is very durable so losses due to attrition are kept to a minimum.
• GAC has a very high carbon-low ash content.
• GAC will impart a high “polish” to the fi ltered water.

   
       
 
 

Birm
Birm is an efficient and economical media for the reduction of dissolved iron and manganese compounds from raw water supplies. It may be used in either gravity fed or pressurized water treatment systems.

Birm acts as an insoluble catalyst to enhance the reaction between dissolved oxygen (D.O.) and the iron compounds. In ground waters the dissolved iron is usually in the ferrous bicarbonate state due to the excess of free carbon dioxide and is not filterable. Birm, acting as a catalyst between the oxygen and the soluble iron compounds, enhances the oxidation reaction of Fe++ to Fe+++ and produces ferric hydroxide which precipitates and may be easily filtered. The physical characteristics of Birm provide an excellent filter media which is easily cleaned by backwashing to remove the precipitant.

Birm is not consumed in the iron removal operation and therefore offers a tremendous economic advantage over many other iron removal methods.

Birm may also be used for manganese reduction with the same dependability as iron removal. In these applications the water to be treated should have a pH of 8.0-9.0 for best results. If the water also contains iron, the pH should be below 8.5. High pH conditions may cause the formulation of colloidal iron which is very diffi cult to fi lter out. All other conditions remain the same for either manganese or iron removal.

ADVANTAGES
Under the proper conditions, no chemicals to purchase for maintenance. Regeneration not required.
Iron removal efficiency is extremely high.
Negligible labor cost: only periodic backwashing required.
Durable material with a long life and wide temperature range.

   

Resin
Ion exchange resins are polymers that are capable of exchanging particular ions within the polymer with ions in a solution that is passed through them.  This ability is also seen in various natural systems such as soils and living cells.  The synthetic resins are used primarily for purifying water, but also for various other applications including separating out some elements.

In water purification the aim is usually either to soften the water or to remove the mineral content altogether. 

The water is softened by using a resin containing Na + cations but which binds Ca 2+ and Mg 2+ more strongly than Na +.  As the water passes through the resin the resin takes up Ca 2+ and Mg 2+ and releases Na + making’ softer’ water. 

If the water needs to have the mineral content entirely removed it is passed through a resin containing H + (which replaces all the cations) and then through a second resin containing OH - (which replaces all the anions).  The H + and OH - then react together to give more water.

The advantages of the process (long life of resins, cheap maintenance etc…).  In addition, the process is very environmentally friendly because it deals only with substances already occurring in water.