2025 Nelsen Corporation Catalog - Catalog - Page 122
4 Birm®
Resins, Media & Chemicals
Birm®
Birm® is an efficient and economical method of removing 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 an 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 and therefore offers a tremendous economic
advantage over many other iron removal methods.
Birm® may also be used for manganese removal with the same
dependability as iron removal. In these applications the water to
be treated should have a pH of 8.0 to 9.0 for the best results. If
the water also contains iron, the pH should be below 8.5. High pH
conditions may cause the formation of colloidal iron which is very
difficult to filter out. All other conditions remain the same for either
manganese or iron removal.
Certified to
NSF/ANSI 61
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
• Weighs only 46-50 lbs/ft3
Physical Properties:
Color...................................................................................... Black
Density ............................................................................... 47-50 lbs/ft3
Effective Size ............................................................................ 0.61 mm
Uniformity Coefficient ......................................................................1.72
Conditions for Operation:
• Alkalinity should be greater than two times the combined sulfate
and chloride concentration
• pH - 6.8+
• Dissolved Oxygen (D.O.) content must be equal to at least 15% of
the iron (or iron and manganese content)
• Bed Depth - 30 - 36 in.
• Backwash Rate - 10-12 gpm. sq. ft.
• Backwash Bed Expansion - 35 -50% of bed depth
• Service Flow rate - 3.5 - 5 gpm. square foot intermittent flow rates
and/or favorable conditions may allow higher flow rates
Birm® is a federally registered trademark of Clack Corporation.
Birm (for Iron Removal)
Birm® is used to remove dissolved iron and manganese. The pH must be above 6.8 and dissolved
oxygen content must be equal to 15% of the iron and manganese content. No regeneration is required,
only periodic backwashing.
Pallet quantity - 40 bags per pallet
BIRM-R
1 Cubic Foot Bag (47 lbs)
BIRM-R-50-BOX
1/2 Cubic Foot Box
BIRM-R-75-BOX
3/4 Cubic Foot Box
BIRM-R-100-BOX
1 Cubic Foot Box
4 - 20
For more information visit – NelsenCorp.com • NelsenWaterSolutions.com • VESTAwater.com
All prices and products subject to change without notice. ©Nelsen Corporation
