55/85 Process Media Brochure

T e c h n i c a l B u l l e t i nKDF Fluid Treatment, Inc. • Research and Development Laboratory • Three Rivers, MichiganKDF Process Media are high-purity copper-zinc granules thatreduce contaminants in waterusing oxidation/reduction(redox) reaction. KDF 55process medium is an effec-tive chlorine removal agentused in point-of-entry (POE) treatmentof municipal water supplies. KDF 85process medium is an effective iron(ferrous) and hydrogen sulfide (H2S)removal agent that may be used alone orto protect existing water filtration/purification technologies in POEtreatment of groundwater supplies.These unique, innovative and environmen-tally responsible media consist of highpurity copper-zinc granules that use redox(the exchange of electrons) in patentedKDF® 55 and 85 Process Media in Point-of-EntryWater Treatment Systems – Chlorine, Iron andHydrogen Sulfide Reductionproducts to effectively reduce/removechlorine, iron, hydrogen sulfide, heavymetals, and control microorganisms inpotable water without the use of chemicals.What’s more, KDF 55 and 85 media arehighly efficient and tank size requirementsare modest for more economical systemengineering and installation.This bulletin describes the proper use ofKDF media in residential (whole house),commercial, institutional, and light indus-trial buildings and facilities with potablewater service flows in a range from 3 to324 gallons per minute with maximumchlorine, iron, and H2S concentrationsof 5 ppm/mgl.Medium Requirementsand System SizingEasily the most critical aspect of pressurefilter performance is the relationship offlow rate to surface of KDF media. Inaccu-rate sizing is the most common reason fortrouble in filter systems. The nominal flowrate in the service cycle depends on surfacearea available. For most types of filtermedia, the service flow rate must notexceed five gallons per minute (gpm) persquare foot of surface area, with at least a30-inch filter bed depth.Service flow rates with KDF ProcessMedia, however, may be calculatedat 15 gpm per square foot of surfacearea (0.104 gpm per square inch).This is three times the effective flowrate of other filter media.KDF FILTER3-CYCLEBACKWASHVALVE50 MICRONPOSTFILTER(OPTIONAL)OPTIONAL: SOFTENER,REVERSE OSMOSIS,DEIONIZED BEDS, ULTRAVIOLET, OZONE, GACMUNICIPAL SUPPLY/GROUNDWATERKDF Media POE Recommended Operating Conditions(use 3-cycle valve)Service flow ............................................................................. 15 gpm/sq. ft.Backwash for 10 min. @ ......................................................... 30 gpm /sq. ft.Purge/rinse for 3 min. @ ................................................................ maximumBed expansion, backwash .............................................................. 10 to 15%Free board ............................................................................................... 20%Minimum bed depth (6" dia.) ................................................................... 10"pH range: drinking water ................................................................. 6.5 to 8.5Water temperature, influent ...................................................... 35°F to 212°F(Always maintain wetness)Pressure Drop, KDF® Media ( ?????p)0 20 40 60 80 100 120Gallons Per Minute510152025 Tank Diameter8 in.12 in.16 in.24 in.36 in.• • •• • • •• • • •?pWhat isKDFProcessMedia?In electrochemical reductionprocesses, surface products areformed when KDF® media areused in point-of-entry (POE)water treatment systems. Thesebyproducts, along with any calcium andmagnesium precipitate, must be periodicallybackwashed. For backwash rates of 3 to 25gpm, use a high quality 3-cycle backwashvalve (service, backwash, purge). One with ahigh-flow backwash mode is best. For 36 to324 gpm, use a diaphragm nest valve.Remember to remove any backwash flowrestrictors. Select a distributor based onbackwash flow rate. For 3 to 11 gpm, use afine slotted distributor and for 15 to 324 gpm,use a hub and lateral distributor (#8 garnetunderbedding is recommended). Time thebackwash cycle for ten minutes and purge forthree minutes. Backwash at least three timesper week, more frequently if necessary,depending upon the quality of the watersupply. If more backwashing is required,repeat the entire cycle. Backwash flow ratesare a function of backwash water temperature;type, size and density of media; and thespecific design of the pressure filter. KDFProcess Media have a density of 171 poundsper cubic foot, which makes it a very highdensity medium requiring a backwash flowrate of twice the service flow.KDF media require 30 gallons per minute persquare foot of bed surface area. Very cold waterrequires somewhat lower backwash rates andwarmer water requires higher rates. Do notrestrict pipe size to the drain.Note: If backwashing procedures are not properlyfollowed, KDF Process Media may becomefouled. For proper cleaning techniques, contactKDF’s Technical Department.Back-washingKDFProcessMediaMaximum Tank Minimum PipeService Size BackwashDistributorBackwash Size BedFlow Diameter Valve Rate Diameter Depth Weight Volume No. of(gpm) (inches)Required(gpm) (inches) (inches) (lbs) (cu. ft.) Drums3 6x35 6 0.75 10 28.5 0.16 0.54 7x35 8 0.75 11 42.8 0.25 0.755.5 8x40 Fine 10 0.75 12 57.0 0.33 1.06 9x44 slotted 12 0.75 13 85.5 0.50 1.58 10x44 3-cycle 16 0.75 14 114.0 0.66 2.011 12x48 22 1 16 171.0 1.04 3.015 14x65 30 1 18 285.0 1.60 5.020 16x65 40 1.5 20 399.0 2.33 7.025 18x65 50 1.75 22 627.0 3.50 11.036 21x62 Hub 72 2 24 855.0 5.00 15.045 24x72 and 90 2 25 1140.0 6.50 20.072 30x70 Diaphragm lateral 144 2.5 25 1767.0 10.25 31.0100 36x70 nest 200 2.5 25 2565.0 14.75 45.0144 42x73 288 3 25 3420.0 20.00 60.0188 48x78 376 4 25 4446.0 26.00 78.0324 63x86 648 5 25 7695.0 45.00 135.0KDF Process MediaNOTICE: As of this printing, KDF Fluid Treatment believes the data herein are reliable and accurate. The data are based on outside and internallaboratory tests. Due to varying water chemistry, it is recommended that users test performance on their own equipment. As technical assistanceis furnished by KDF Fluid Treatment at no charge to the user and since KDF Fluid Treatment has no control over engineering of hardwareincorporating the KDF® media, KDF Fluid Treatment assumes no liability or responsibility for such assistance. Due to synthetic procedures usedby outside laboratories, KDF Fluid Treatment is not responsible for differing results in the field. KDF Fluid Treatment assumes no responsibilityfor user claims on the pesticidal abilities of KDF media because of varying water chemistry and users’ applications. Since governmentalregulations may differ from one location to another and may change from time to time, KDF Fluid Treatment is not responsible for users’manufacturing procedures, disposal practices, selection of media, or claims or advertising by the user. No warranty, express or implied is givennor is freedom from any patent owned by KDF Fluid Treatment or others to be inferred.Form No. 1003-603 TSAKDF Fluid Treatment, Inc.1500 KDF Drive, Three Rivers, Michigan 49093-9287Toll-free: 1-800-437-2745 • Phone: 1-269-273-3300 • Fax: 1-269-273-4400E-mail: info@kdfft.com • Web: www.kdfft.comSolutions for economical clean water.TMEngineering Guidelines for KDF Media