Industrial Application Guide Without UL.qxd - Purafil

Product Selection Guide for 

Industrial Applications

Table of Contents 

Controlling Corrosion and Increasing Reliability 

Clean Air Guarantee 4 

Air Quality Standard 4 

Environmental Monitoring 5 

Corrosion Classification Coupons 5 

OnGuard ® Corrosion Monitors 6 

Design Requirements and Product Offering 

Sealing and Room Air Pressurization 7 

Room Air Recirculation 7 

Environmental Control Factors 7 

Purafil Corrosion Control Systems 

Self-Contained Systems 8 

HVAC Integrated Systems 8 

Purafil MediaPAK PK-12 Module 9 

Particulate Filters 10 

Deep Bed Scrubber 11 

Tub Scrubber System 14 

Positive Pressurization Unit 15 

Corrosive Air Unit 16 

Purafil Side Access System 17 

Electronic Cabinet Unit 19 

Compressor Intake Filter 20 

Purafil Gas-Phase Air Purification Media 

Purafil ® Select 23 

Purakol ® 24 

Purakol ® AM 25 

Purafil ® Select CP Blend 26 

Puracarb ® 27 

Chlorosorb ® II 28

Controlling Corrosion and Increasing Reliability 

Corroded pin connectors 

Corroded circuit board 

Magnified view of a corroded circuit board 

Air is the biggest threat to the reliability of your electronics. 

The air in your facility contains many types of 

pollutants that corrode fine electronics and integrated 

circuits. 

Corrosion is the deterioration of metal due to the presence 

of acid gases. These gases attack edge connectors, 

pin connectors, IC plug-in sockets, wire-wrap connections, 

and other metal components. Corrosion leads to 

blocked currents, brittle connection points, overheated 

electrical systems, slowed production, and expensive 

equipment repairs. The end result: decreased reliability, 

increased maintenance, and lost revenues. 

Purafil's dry-chemical systems protect capital-intensive 

equipment, including computer systems, compressors, 

switchgear, etc. against corrosive failures. For 

over 30 years, Purafil has been the leading manufacturer 

of clean air solutions for industrial facilities. We 

maintain nearly 20,000 installations worldwide in: 

• Fertilizer plants 

• Gas generation facilities 

• Oil refineries 

• Petrochemical plants 

• Pulp and paper mills 

• Smelting plants 

• Steel mills 

• Copper mines 

• Textile manufacturers 

• Pharmaceutical plants 

Our systems are housed in motor control centers, rack 

rooms, and central control rooms. With a single circuit 

board costing as much as $10,000, a dry-chemical system 

from Purafil saves time and money. A Purafil system 

also: 

• ensures the smooth operation of 

production processes 

• prevents lost revenue due to repairs 

and downtime 

• extends service life of sensitive 

electronics and instrumentation 

Shown on page 5, ISA Standard 71.04-1985 is the 

accepted guideline for warranties of electronic equipment. 

This standard classifies the level of airborne contamination 

that is safe for the reliable operation of electronics. 

Because Purafil designs units based on the ISA 

standard, our systems guarantee Class G1 air. In Class 

G1 environments, corrosion is not a factor in determining 

equipment reliability. 

Clean Air Guarantee 

Purafil has contributed to the development of ISA 

Standard 71.04-1985, which classifies the level of airborne 

contamination that is safe for electronics. As part 

of Purafil's Clean Air Guarantee, industrial facilities 

worldwide can be assured that contaminant levels will 

be reduced to the target parameters established by ISA 

so that corrosion is NOT a factor in determining equipment 

reliability. A controlled space such as a control 

room or motor control center is designed in accordance 

with strict environmental criteria, to protect sensitive 

electronic/electrical equipment from damage caused by 

corrosive gases. 

Air Quality Standard 

ISA Standard 71.04-1985 titled "Environmental 

Equipment Conditions for Process Management and 

Control Systems, Airborne Contaminants," has become 

the accepted guide for determining the air quality in 

computer room environments. Purafil systems are 

designed to reduce contamination levels to those 

required for safe operation of electronic/electrical 

equipment. 

According to ISA, reactivity monitoring provides a 

quantitative measure of the overall corrosion potential 

of an environment. Reactivity monitoring involves the 

placement of specially prepared copper "coupons" in 

the operating environments. Over time, acid gases will 

tarnish the coupons, and corrosion films will develop. 

Measured in angstroms*, the rate of corrosion build up 

determines the environment's ISA classification (see 

chart on page 5). 4 

*(1)10 millionth of a millimeter (Å)

Air Quality Classifications Defined 

Mild - an environment sufficiently well 

controlled that corrosion is not a factor in 

determining equipment reliability. 

Moderate - an environment in which the 

effects of corrosion are measurable and may be 

a factor in determining equipment reliability. 

Harsh - an environment in which there is a 

high probability that corrosive attack will occur. 

These harsh levels should prompt further 

evaluation resulting in environmental controls 

or specially designed and packaged equipment. 

Severe - electronic/electrical equipment are 

not expected to survive in these environments. 

Environmental Monitoring 

Corrosion Classification Coupons 

Reactivity monitoring using Corrosion Classification 

Coupons (CCC) is a widely accepted technique used to 

characterize the destructive potential of an environment. 

Because many of the contaminants targeted for control 

are corrosive in nature (e.g., hydrogen sulfide and sulfur 

dioxide), reactivity monitors have long been used to 

gauge the quality of ambient air and to indicate the 

effectiveness of pollution control strategies. Purafil's 

CCC analysis results correlate directly to ISA Standard 

71.04-1985. 

Coupon Placement: CCCs are typically employed in 

industrial settings to determine the effect of corrosion 

on sensitive electronics. Coupons are a reliable, costeffective 

means of classifying external and internal 

environments. As part of the Purafil's monitoring strategy, 

individual CCCs are placed in the following areas: 

• Control rooms 

• Rack rooms 

• Motor control centers 

• Laboratories 

• Critical parts storage rooms 

• Mainframe computer rooms 

Laboratory Analysis: Following a period of 30 to 90 

days, the CCCs are collected and sent to Purafil's laboratory. 

The purpose of CCC analysis is to determine the 

type and rate of corrosion buildup (Å/30 days). This 

method of reactivity monitoring has been extensively 

researched by Batelle Laboratories and Bell Telephone. 

Coupon Analysis Report: The results of Purafil's 

environmental analysis are reported and made accessible 

to your local Purafil representative through our 

online Installation Tracking System, available 24 hours 

a day, 7 days a week. Included in the report are the general 

classes of gases present, estimated concentration 

levels, and humidity effects in your environment. 

G1 

G2 

G3 

GX 

Class 

G1 

G2 

G3 

GX 

Class 

G1 

G2 

G3 

GX 

Corrosion Classification Coupons can be 

analyzed to determine your environment's 

ISA classification. 

Air Quality Standards 

ISA Standard 71.04-1985 

Air Quality 

Classification 

Mild 

Moderate 

Harsh 

Severe 

Reactivity Rate 

OnGuard ® CCT 

OnGuard ® Corrosion Monitors 

Purafil's OnGuard ® series of monitors continuously 

detect and transmit data in contaminant concentrations 

at levels as low as one part per billion. OnGuard readings 

also correlate to ISA's classification scheme. 

Unlike Corrosion Classification Coupons, OnGuard 

readings are real time, which allows preventive action 

to be taken before serious corrosion damage occurs. 

OnGuard Continuous Corrosion Transmitter 

(CCT): The OnGuard CCT logs cumulative or incremental 

data to detect and measure isolated corrosioncausing 

events and potential effects on equipment reliability. 

The CCT gauges in real time the amount of 

corrosion forming on copper and silver surfaces and 

transmits this information to your building management 

system. These measurements are directly related 

to ISA severity levels. 

OnGuard 2000 Atmospheric Corrosion Monitor: 

The OnGuard 2000 helps solve corrosion problems 

before severe damage occurs. The OnGuard 2000 continuously 

measures the real-time effects of corrosion as 

well as temperature, relative humidity, and optional differential 

room pressure. Using this data, the monitor 

projects your environment's ISA severity level and 

helps increase the reliability of electronic instruments. 

Measurements can be read directly on the monitor's 

LCD panel or uploaded to your personal computer or 

distributed control system. 

OnGuard ® 2000 

OnGuard ® 2000 connected to personal 

computer 

6

Design Requirements and Product Offering 

To design a controlled environment that will conform to 

ISA standards, Purafil takes into consideration proper 

room sealing, room pressurization, room recirculation, 

and humidity and temperature control. 

Sealing and Room Air Pressurization 

A controlled space must be positively sealed and pressurized 

to prevent the infiltration of contaminated air. 

Seal the space using airlock entries/exits and close all 

holes, cracks, wall and ceiling joints, and cable and utility 

penetrations. Purafil recommends a positive pressure 

of 0.05 to 0.1 iwg, which is achieved by introducing 

outdoor air through an air purification system at a rate 

of 1 to 3 air changes per hour (2 to 5% of the room volume 

per minute). 

Room Air Recirculation 

Purafil designs gas-phase air purification systems that 

function as either pressurization-only systems or pressurization-and-recirculation 

systems. Use a pressurization-only 

system when the space is properly sealed, the 

level of pedestrian traffic is minimal, contaminant concentrations 

are low, and negative pressure ductwork is 

located outside the space. The pressurization system 

removes gaseous contaminants from outdoor intake air 

and provides clean air to the protected space. 

In all other cases, Purafil recommends recirculation 

through an air purification unit at a rate of 10 to 15 air 

changes per hour (17 to 25% of the total room volume 

per minute). The recirculation system purifies air within 

the space to maintain the lowest corrosion levels. 

Environmental Control Factors 

Humidity: ISA S71.04-1985 recommends

Purafil Tub Scrubber System 

Corrosion Control Systems 

Purafil manufactures a broad line of gas-phase air 

purification systems to meet the unique requirements 

of each air purification application. All systems offer a 

customized selection of prefilter, chemical, and final 

filter sections. Purafil systems are grouped into two 

categories: self-contained systems and HVAC integrated 

systems. 

Self-Contained Systems 

A self-contained system consists of housing to hold 

Purafil gas-phase air purification media and a blower 

section to move the contaminated airstream through 

the media bed. Purafil's offers the following self-contained 

systems: 

• Tub Scrubber System 

• Deep Bed Scrubber 

• Positive Pressurization Unit 

• Corrosive Air Unit 

HVAC Integrated Systems 

HVAC integrated systems offer the confidence that all 

parts of the air handling system will work together. 

Integrated systems are dependent upon the central 

HVAC system for operation and require space in the 

mechanical or machine rooms in which they can be 

placed. 

An HVAC integrated unit, the Purafil Side Access system 

is used to filter low to medium concentrations of 

outside gaseous contaminants in less polluted areas of 

process industries. The system can also be used for 

recirculation purposes to maintain low contaminant 

levels. 

Purafil Positive Pressurization Unit 

The Tub Scrubber System is bulk filled with media by 

way of fill chute openings at the top of the unit. The 

Deep Bed Scrubber is also a bulk-filled system but can 

also be tracked to house MediaPAK PK-12 disposable 

modules. Factory filled with the user's choice of Purafil 

media, PK-12 modules significantly reduce maintenance 

and service time. Purafil's Positive 

Pressurization Unit and Corrosive Air Unit are also 

designed to house PK-12 modules. 

Self-contained systems are separate from the HVAC 

system. They are designed for higher gas challenge 

levels and allow for easier retrofits, the use of standard 

air handlers, and less complex air balancing. 

Purafil Deep Bed Scrubber 

8

Purafil MediaPAK PK-12 Module 

The MediaPAK PK-12 disposable plastic modules are 

factory filled with Purafil dry-chemical media and sent 

to the user ready to be installed. Constructed of highimpact 

polystyrene, the rigid frame eliminates the possibility 

of bypass air and guarantees maximum system 

efficiency for the life of the media. 

Purafil's modular systems are tracked to house 

MediaPAK PK-12 modules, which significantly reduce 

installation and maintenance time. In fact, no tools are 

required for installation or replacement. 

The figure below shows a side view of the MediaPAK 

module within the Purafil Side Access System. The 

unique V-shaped bed of the module increases filter efficiency 

while reducing pressure drop. 

Purafil PK-12 

PK-12 Features 

Frame: 

Nominal Size 

(h x w x d): 

Media Bed Depth: 

High-impact polystyrene 

12 x 24 x 12 in 

(305 x 610 x 305 mm) 

3 in (76.2 mm) 

Pressure Drop: Not to exceed 1.30 iwg (324 

Pa) at 250 fpm (1.27 mps) 

face velocity in all units 

except the Deep Bed 

Scrubber. Recommended face 

velocity for PK-12 modules in 

DBS is 100 fpm (0.508 mps). 

Media Volume: 1.0 ft 3 (0.028 m 3 ) 

Face Velocity = 250 fpm (1.27 mps) 

9

Particulate Filters 

Purafil systems feature gaseous and particulate filtration 

sections for complete control of contaminants. 

Purafil offers a custom selection of the following particulate 

filter options: 

Model 

Nominal Size 

in (mm) 

ASHRAE 

Efficiency 

Nominal Airflow 

cfm (m 3 /hr) 

Initial P 

iwg (Pa) 

Terminal P 

iwg (Pa) 

TP-25 12 x 24 

(305 x 610) 

20 - 25% 

Not MERV tested 

800 - 1000 

(1359 - 1700) 

0.23 - 0.35 

(57 - 87) 

0.70 (174) 

JFL-90 

24 x 24 

(610 x 610) 

20 - 25% 

Not MERV tested 

1600 - 2000 

(2720 - 3400) 

0.23 - 0.35 

(57 - 87) 

0.70 (174) 

PP-30 12 x 24 x 1 

(305 x 610 x 25) 

MERV 6 500 (850) 0.15 (37) 0.70 (174) 

12 x 24 x 2 

(305 x 610 x 51) 

MERV 6 

750 - 1000 

(1274 - 1700) 

0.15 - 0.27 

(37 - 67) 

0.70 (174) 

24 x 24 x 2 

(610 x 610 x 51) 

MERV 6 

1500 - 2000 

(2550 - 3400) 

0.15 - 0.27 

(37 - 67) 

0.70 (174) 

12 x 24 x 4 

(305 x 610 x 102) 

24 x 24 x 4 

(610 x 610 x 102) 

FF-90 12 x 24 x 11-1/3 

(305 x 610 x 287) 

24 x 24 x 11-1/3 

(610 x 610 x 287) 

MERV 6 1000 (1700) 0.20 (50) 0.70 (174) 

MERV 6 2000 (3400) 0.20 (50) 0.70 (174) 

MERV 14 1000 (1700) 0.20 (124) 1.50 (373) 

MERV 14 2000 (3400) 0.20 (124) 1.50 (373) 

PH-97 

HEPA 

Filter 

12 x 24 x 11-1/3 

(305 x 610 x 287) 

24 x 24 x 11-1/3 

(610 x 610 x 287) 

Not applicable 500 (850) 1.00 (249) 2.00 (496) 

Not applicable 1000 (1700) 1.00 (249) 2.00 (496) 

JFL-90 12 x 24 x 5 

(305 x 610 x 127) 

MERV 13 

400 - 1000 

(680 - 1700) 

0.30 - 0.80 

(75 - 200) 

1.20 (299) 

24 x 24 x 5 

(610 x 610 x 127) 

MERV 13 

800 - 2000 

(1359 - 3400) 

0.30 - 0.80 

(75 - 200) 

1.20 (299) 

10

Deep Bed Scrubber (DBS) 

Purafil's DBS is designed to sit outside the protected 

space and provide clean pressurization air to rooms 

equipped with electronic process control systems. The 

DBS is ideal for refineries, steel mills, smelters, chemical 

plants, petrochemical plants, and other hostile environments. 

The scrubber features up to four separate 12- 

inch-deep beds, each of which is filled from the top with 

Purafil dry-chemical media. Multiple media stages are 

required when multiple contaminant challenges are 

present. The OnGuard ® Continuous Corrosion 

Transmitter (CCT) is a standard feature on the DBS. 

Use the CCT to verify the cleanliness of discharge air. 

DBS 

Model 

2-Pass System Dimensions 

C* Depth Height Width M** 

in mm in mm in mm in mm in mm 

402 8.00 203 99.00 2514 47.50 1206 23.68 601 22.44 569 

403 8.00 203 99.00 2514 47.50 1206 35.53 902 34.28 870 

404 8.00 203 99.00 2514 47.50 1206 47.37 1203 46.12 1171 

504 8.00 203 99.00 2514 59.35 1507 47.37 1203 46.12 1171 

604 10.00 254 99.00 2514 71.20 1808 47.37 1203 46.12 1171 

605 10.00 254 99.00 2514 71.20 1808 59.22 1504 57.97 1472 

606 10.00 254 99.00 2514 71.20 1808 71.06 1804 69.81 1773 

706 10.00 254 99.00 2514 83.05 2120 71.06 1804 69.81 1773 

608 10.00 254 99.00 2514 71.20 2120 94.75 2406 93.50 2374 

Standard Features 

• OnGuard ® CCT for clean air verification 

• 3003 H-14 aluminum construction 

• MERV 6 efficient prefilter (per ASHRAE 

standard 52-76) 

• High efficiency final filter (Purafil's JFL-90) 

• Up to four different dry-chemical media 

manufactured by Purafil 

• Mill and chemical duty motor 

• Skid mounted 

• 1.0 iwg (249 Pa) external static 

Optional Features 

• Stainless steel or double wall construction 

• Explosion-proof motor 

• Rain louver with bird screen 

• Redundant blower, motor, and back draft damper 

• Direct drive blower 

• Additional external static 

• Air measuring station 

• Pre- and final filter gages 

DBS 

Model 

3-Pass System Dimensions 

C* Depth Height Width M** 

in mm in mm in mm in mm in mm 

402 8.00 203 112.00 2844 47.50 1206 23.68 601 22.44 569 

403 8.00 203 112.00 2844 47.50 1206 35.53 902 34.28 870 

404 8.00 203 112.00 2844 47.50 1206 47.37 1203 46.12 1171 

504 8.00 203 112.00 2844 59.35 1507 47.37 1203 46.12 1171 

604 10.00 254 112.00 2844 71.20 1808 47.37 1203 46.12 1171 

605 10.00 254 112.00 2844 71.20 1808 59.22 1504 57.97 1472 

606 10.00 254 112.00 2844 71.20 1808 71.06 1804 69.81 1773 

706 10.00 254 112.00 2844 83.05 2120 71.06 1804 69.81 1773 

608 10.00 254 112.00 2844 71.20 2120 94.75 2406 93.50 2374 

* Distance from the top of the scrubber to the top of the fill port 

** Width of the scrubber less 1.25 in (31.75 mm) to account for the mounting of four anchor holes (two on each side), 

each measuring 0.625 inches (15.88 mm) in width 

11

Air Movement : 2-Pass System at 100 fpm (0.5 mps) Face Velocity 

DBS Model 

Optional ∆P* JFL 

Airflow 

Total ∆P* 

Final Filter 

cfm m 3 /hr iwg Pa iwg Pa 

402 800 1359 5.2 1295 0.3 75 

403 1200 2039 5.2 1295 0.3 75 

404 1600 2178 5.2 1295 0.3 75 

504 2000 3398 5.2 1295 0.3 75 

604 2400 4078 5.2 1295 0.3 75 

605 3000 5097 5.2 1295 0.3 75 

606 3600 6116 5.2 1295 0.3 75 

706 4200 7136 5.2 1295 0.3 75 

608 4800 8155 5.2 1295 0.3 75 

Air Movement : 3-Pass System at 100 fpm (0.5 mps) Face Velocity 

DBS with double wall construction 

DBS Model 

Optional ∆P* JFL 

Airflow 

Total ∆P* 

Final Filter 

cfm m 3 /hr iwg Pa iwg Pa 

402 800 1359 7.05 1756 0.3 75 

403 1200 2039 7.05 1756 0.3 75 

404 1600 2178 7.05 1756 0.3 75 

504 2000 3398 7.05 1756 0.3 75 

604 2400 4078 7.05 1756 0.3 75 

605 3000 5097 7.05 1756 0.3 75 

606 3600 6116 7.05 1756 0.3 75 

706 4200 7136 7.05 1756 0.3 75 

608 4800 8155 7.05 1756 0.3 75 

* Total ∆P= ∆P Prefilter + ∆P Each Media Bed + ∆P Final Filter 

12

Media and Filters 

DBS Model Media Per Bed Quantity 

Prefilter PP-30 

Purafil ® Select Purakol ® Puracarb ® 

Quantity Final 

Filter JFL-90 

lbs kgs lbs kgs lbs kgs 

402 500 227 300 136 450 204 2: 24 x 24 x 2 in 2: 24 x 24 x 2 in 

403 700 318 420 191 630 286 

2: 24 x 24 x 2 in 

2: 12 x 24 x 2 in 

2: 24 x 24 x 5 in 

2: 12 x 24 x 5 in 

404 950 431 570 259 855 388 4: 24 x 24 x 2 in 4: 24 x 24 x 2 in 

504 1150 522 690 313 1035 469 4: 24 x 24 x 2 in 4: 24 x 24 x 5 in 

604 1350 612 810 367 1215 551 6: 24 x 24 x 2 in 6: 24 x 24 x 2 in 

605 1750 794 1050 476 1575 714 

6: 24 x 24 x 2 in 

3: 12 x 24 x 2 in 

6: 24 x 24 x 5 in 

3: 12 x 24 x 5 in 

606 2050 930 1230 558 1845 837 9: 24 x 24 x 2 in 9: 24 x 24 x 2 in 

706 2350 1066 1410 640 2115 959 

9: 24 x 24 x 2 in 

3: 12 x 24 x 2 in 

9: 24 x 24 x 5 in 

3: 12 x 24 x 5 in 

608 2750 1247 1650 748 2475 1123 12: 24 x 24 x 2 in 12: 24 x 24 x 2 in 

Note: The metric conversion of prefilter and final filter sizes are: 24 x 24 x 2 in = 610 x 610 x 51 mm, 12 x 24 x 2 in = 305 x 

610 x 51 mm, 24 x 24 x 5 in = 610 x 610 x 127 mm, and 12 x 24 x 5 in = 305 x 610 x 127 mm. 

Puracarb ® Media 

Purafil ® Select Media 

Purakol ® Media 

13

Purafil Tub Scrubber System 

Tub Scrubber System (TSS) 

Purafil's TSS provides clean air in controlled 

environments housing sensitive computer 

equipment. The TSS eliminates corrosive 

gases typically found in industrial settings. A 

single three-foot deep media bed makes the 

TSS particularly effective in high contaminant 

areas. To meet your specific design 

requirements, Purafil offers systems for airflows 

from 500 to 6000 cfm. 

Constructed of corrosion-resistant materials, 

the TSS is designed for one or more years of 

low-maintenance service; its three-foot bed is 

bulk filled with Purafil dry-chemical media. 

Media changeout is simple and fast as the filters, 

blower section, and media bed are easily 

accessible. 

TSS Model Airflow Total ∆P* 

iwg (Pa) 

cfm m 3 /hr 

500 500 850 

1000 1000 1700 

2000 2000 3400 

3000 3000 5100 

4000 4000 6800 

6000 6000 6800 

7.01 

(1744) 

8.63 

(2147) 

8.63 

(2147) 

8.99 

(2237) 

8.63 

(2147) 

8.99 

(2237) 

∆P Rain Louver 

Bird Screen 

iwg (Pa) 

0.01 (2.5) 

0.04 (10) 

0.04 (10) 

0.04 (10) 

0.04 (10) 

0.04 (10) 

* Total ∆P= ∆P Prefilter + ∆P Media Bed + ∆P Pre-Final Filter + ∆P Final Filter + ∆P External Static 


• OnGuard ® Å-Prompt monitor for clean air verification 

• Full charge of media manufactured by Purafil 

• Three-foot media bed depth 

• Constructed of fiberglass, 3003-H14 aluminum, 

or 304 or 316 stainless steel 

• 1.0 iwg (249 Pa) external static pressure 

• Easily accessible fill port and clean-out port 

• MERV 6 efficient prefilter (per ASHRAE 

Standard 52-76) 

• High efficiency JFL-90 final filter, preceded by a 

MERV 6 efficient pre-final filter 

• Externally mounted, enclosed blower system 

• Damper controlled air inlet 

• Prefilter housing for blow-through system 


• Air measuring station, cfm gage, room pressure 

gage, and housing (shipped separately for field 

installation) 

• Particulate pre- and final filter gages and housing 

• Other media choices available 

• Rainlouver with bird screen for inlet 

TSS 

Model 

500 

1000 

2000 

3000 

4000 

6000 

Volume 

of Media 

ft 3 (m 3 ) 

21 

(0.595) 

39 

(1.104) 

72 

(2.039) 

96 

(2.718) 

144 

(4.077) 

192 

(5.437) 

Quantity and Size of Filters 

Prefilter PP-30 Pre-Final Filter Final Filter 

Qty. Size in (mm) Qty. Size in (mm) Qty. Size in (mm) 

1 

1 

1 

2 

2 

2 

12 x 24 x 2 

(305 x 610 x 51) 

12 x 24 x 2 

(305 x 610 x 51) 

24 x 24 x 2 

(610 x 610 x 51) 

24 x 24 x 2 

(610 x 610 x 51) 

24 x 24 x 2 

(610 x 610 x 51) 

12 x 24 x 2 

(305 x 610 x 51) 

and 

24 x 24 x 2 

(610 x 610 x 51) 

1 

1 

1 

1 

2 

2 

12 x 24 x 2 

(305 x 610 x 51) 

12 x 24 x 2 

(305 x 610 x 51) 

24 x 24 x 2 

(610 x 610 x 51) 

12 x 24 x 2 

(305 x 610 x 51) 

and 

24 x 24 x 2 

(610 x 610 x 51) 

24 x 24 x 2 

(610 x 610 x 51) 

12 x 24 x 2 

(305 x 610 x 51) 

and 

24 x 24 x 2 

(610 x 610 x 51) 

1 

1 

1 

1 

2 

2 

12 x 24 x 5 

(305 x 610 x 127) 

12 x 24 x 5 

(305 x 610 x 127) 

24 x 24 x 5 

(610 x 610 x 127) 

12 x 24 x 5 

(305 x 610 x 127) 

and 

24 x 24 x 5 

(610 x 610 x 127) 

24 x 24 x 5 

(610 x 610 x 127) 

12 x 24 x 5 

(305 x 610 x 127) 

and 

24 x 24 x 5 

(610 x 610 x 127) 

14

Positive Pressurization Unit (PPU) 

The PPU is a self-contained system designed to provide 

pressurization air that is free of corrosive gases to environments 

containing sensitive electronics. Designed to 

stand alone, it can also be used in conjunction with 

Purafil's Corrosive Air Unit when pressurization and 

recirculation are required. Key application areas for the 

PPU are computer rooms, control rooms, motor control 

centers, and electrical equipment rooms. 

The PPU is available in four horizontal and four vertical 

configurations ranging from 500 to 4000 cfm. The 

flexibility of the PPU design allows for a solution to be 

tailored to meet your particular air filtration needs and 

requirements. The system is tracked to house Purafil's 

disposable MediaPAK modules, which are factory 

filled with Purafil media and sent to the user ready to 

be installed. Disposable modules significantly reduce 

installation and maintenance time. An optional variable 

frequency drive can be added to achieve desired 

airflow. 

PPU 

Model 

Dimensions 

H W D 

in mm in mm in mm 

Total # 

of PK-12 

Modules 

250H 28.30 719 23.69 602.00 103.00 2616 2 

500H 28.30 719 23.69 602.00 103.00 2616 4 

1000H 28.30 719 47.37 1203.00 103.00 2616 8 

2000H 52.00 1321 47.37 1203.00 120.00 3048 16 

250V 85.00 2159 27.00 686.00 27.00 686 2 

500V 85.00 2159 27.00 686.00 27.00 686 4 

1000V 85.00 2159 55.00 1397.00 27.00 686 8 

2000V 105.00 2667 55.00 1397.00 47.50 1206 16 

PPU 

Model 

# of 

passes 

Air Movement 

Velocity Airflow Total ∆P* 

fpm m/sec cfm m 3 /hr iwg Pa 

250H 2 125 0.62 500 850 3.27 814 

500H 2 250 1.25 1000 1699 3.27 814 

1000H 2 250 1.25 2000 3398 3.27 814 

2000H 2 250 1.25 4000 6796 3.27 814 

250V 2 250 1.25 500 850 3.27 814 

500V 2 250 1.25 1000 1699 3.27 814 

1000V 2 250 1.25 2000 3398 3.27 814 

2000V 2 250 1.25 4000 6796 3.27 814 

Purafil Positive Pressurization Unit 



• Direct drive fan 

• Variable frequency drive 

• Integral balancing damper 

• 0.2 iwg external static (saturated filters) 

• Particulate filtration 

• Grey polyurethane paint 

• JFL-90 high efficiency particulate final filter 

• Disposable media modules 


• Aluminum or stainless steel housing 

• Special motors 

• Reverse airflow in vertical units (upward) 

• Optional air openings to match other equipment 

• Floor casters (vertical unit only) 

• Additional sound insulation for occupied spaces 

• Weatherproofing (horizontal unit only) 


• Gage units measuring room pressure, outside air, 

and particulate pressure 

• Air measuring station 

15 

* Total ∆P= ∆P Prefilter + ∆P 2 Media Beds + ∆P Final Filter



• Direct drive fan 

• Variable frequency drive 

• Inlet and outlet grilles 

• Vibration isolation for quiet operation 

• 0.1 iwg external static (saturated filters) 

• Full particulate filtration 

• Grey polyurethane finish 

• Painted cold-rolled steel 


• Aluminum or stainless steel housing 

• Special motors 

• Openings for connection to Purafil PPU unit 

• Floor casters (vertical unit only) 

• Additional sound insulation for occupied spaces 

• Weatherproofing (horizontal unit only) 

• Gage units to read particulate filter pressure 

differential 


• Reverse airflow in vertical limits (downward) 

Corrosive Air Unit (CA) 

The CA is a self-contained air purification system 

designed to recirculate and clean the air within controlled 

environments housing sensitive computer or 

electronic equipment. It can stand alone or be used in 

conjunction with Purafil's Positive Pressurization Unit. 

The CA is designed to maintain low corrosive gas levels 

in pulp and paper mills, petrochemical plants, 

refineries, steel mills, smelting plants, and other process 

industries. 

CA Model 

The CA is available in four horizontal and four vertical 

configurations ranging from 500 to 4000 cfm. It is 

tracked to house Purafil's disposable MediaPAK modules, 

which are factory filled with Purafil media and 

sent to the user ready to be installed. Disposable modules 

reduce installation and maintenance time. The 

flexibility of the CA design allows for a solution to be 

tailored to meet particular air filtration needs and 

requirements. 

Dimensions 

H W D 


# of PK-12 

Modules 

Per Pass 

250H 28.30 719 23.69 602.00 103.00 2616 1 

500H 28.30 719 23.69 602.00 103.00 2616 2 

1000H 28.30 719 47.37 1203.00 103.00 2616 4 

2000H 52.00 1321 47.37 1203.00 120.00 3048 8 

250V 85.00 2159 27.00 686.00 27.00 686 1 

500V 85.00 2159 27.00 686.00 27.00 686 2 

1000V 85.00 2159 55.00 1397.00 27.00 686 4 

2000V 105.00 2667 55.00 1397.00 47.50 1206 8 

Air Movement 

Purafil Corrosive Air Unit 

CA Model 

# of 

passes 

Velocity Airflow Total ∆P* 

fpm m/sec cfm m 3 /hr iwg Pa 

250H 2 250 1.25 500 850 3.27 814 

500H 2 250 1.25 1000 1699 3.27 814 

1000H 2 250 1.25 2000 3398 3.27 814 

2000H 2 250 1.25 4000 6796 3.27 814 

250V 2 250 1.25 500 850 3.27 814 

500V 2 250 1.25 1000 1699 3.27 814 

1000V 2 250 1.25 2000 3398 3.27 814 

2000V 2 250 1.25 4000 6796 3.27 814 

* Total ∆P= ∆P Prefilter + ∆P 2 Media Beds + ∆P Final Filter 

16

Purafil Side Access System (PSA) 

The PSA is designed for both particulate and gaseous 

contamination control and for general odor and corrosion 

control in harsh industrial environments. With the 

PSA, manufacturing facilities such as pulp and paper 

mills, petrochemical plants, chemical plants, steel 

mills, and smelting plants can protect their 

electrical/electronic equipment and personnel more 

effectively. 

The standard PSA is available in various sizes to meet 

your current space requirements. The system is tracked 

to house Purafil's disposable MediaPAK modules, 

which are factory filled with Purafil media for easy 

installation and replacement. This made-to-order system 

ensures retrofit compatibility. 

17 

Airflow 

cfm (m 3 /hr) 

Model 

Unit Face Area 

Nom Height* x 

Nom Width* 

ft (mm) 

# of PK-12 

Modules 

per Pass 

Volume 

Media per 

Pass ft 3 (m 3 ) 

500 (850) PSA 102 1 x 2 (305 x 610) 2 1 (0.028) 

1000 (1700) PSA 104 1 x 4 (305 x 1219) 4 2 (0.056) 

1000 (1700) PSA 202 2 x 2 (610 x 610) 4 2 (0.056) 

1500 (2549) PSA 302 3 x 2 (914 x 610) 6 1.5 (0.042) 

2000 (3398) PSA 402 8 x 2 (2438 x 610) 16 8 (0.227) 

2000 (3398) PSA 204 2 x 4 (610 x 1219) 8 4 (0.113) 

3000 (5097) PSA 206 2 x 6 (610 x 1829) 12 6 (0.340) 

3000 (5097) PSA 304 3 x 4 (914 x 1219) 12 6 (0.340) 

4000 (6796) PSA 404 4 x 4 (1219 x 1219) 16 8 (0.227) 

4500 (7646) PSA 306 3 x 6 (914 x 1829) 18 9 (0.255) 

5000 (8495) PSA 504 5 x 4 (1524 x 1219) 20 10 (0.283) 

6000 (10,194) PSA 406 4 x 6 (1219 x 1829) 24 12 (0.340) 

6000 (10,194) PSA 604 6 x 4 (1829 x 1219) 24 12 (0.340) 

7500 (12,743) PSA 506 5 x 6 (1524 x 1829) 30 15 (0.425) 

8000 (13,592) PSA 408 4 x 8 (1219 x 2438) 32 16 (0.453) 

9000 (15,291) PSA 606 6 x 6 (1829 x 1829) 36 18 (0.510) 

10,000 (16,990) PSA 410 4 x 10 (1219 x 3048) 40 20 (0.566) 

10,000 (16,990) PSA 508 5 x 8 (1524 x 2438) 40 20 (0.566) 

12,000 (20,388) PSA 608 6 x 8 (1829 x 2438) 48 24 (0.680) 

12,500 (21,238) PSA 510 5 x 10 (1524 x 3048) 50 25 (0.708) 

15,000 (25,485) PSA 610 6 x 10 (1829 x 3048) 60 30 (0.850) 

Purafil Side Access System 


• 14 gage galvanized steel housing 

• Custom selection of prefilter and/or final filter 

• Custom selection of Purafil media 

• Galvanized steel doors on both sides with lift and 

turn fasteners 

• Filter tracking 

• Heavy support channels 


• Stainless steel, aluminum, or painted steel 

• Double wall housing 

• Weatherproof construction 

• Doors on one side only 

• Rain louver with bird screen 

• Motor/blower section 

* Please note that aluminum double wall systems require 

additional length. Contact Purafil for exact dimensions. 

Outward turned connection flanges and/or support legs are 

not included in the height and width dimensions.

Calculating PSA Depth 

Calculating the depth of your PSA requires that the 

contents of each filter section—prefilter, chemical module, 

and final filter—have been determined. Use the 

depth selection table below to calculate the depth of 

your unit. Actual unit depth is the sum of the depths of 

each filter section. This figure is rounded to the next 

highest inch if the total is 3/8 in (9.5 mm) or more. See 

the example below: 

For Model 2P-12M-12F-RL: 

Actual Unit Depth = First Section + Chemical Module Section + Final Filter Section + Rain Louver/Bird Screen 

45.70 in 2P = 8.00 in 12M = 18.00 in 12F = 18.00 in RL = 3.50 in 

Section Contents Section Name Depth 

First Section Intermediate Section Final Section 


1 in (25.4 mm) Panel Filter 1P 8.00 203 9.00 229 6.50 165 

2 in (51 mm) Panel Filter 2P 8.00 203 8.00 203 6.50 165 

2-2 in (51 mm) Panel Filter 2P-2P 13.00 330 12.00 305 9.50 241 

4 in (98 mm) Panel Filter 4P 11.00 279 10.00 254 7.50 191 

PK-12 Module 12M 20.50 521 18.00 457 15.50 394 

FF-90 Final Filter 12F 20.50 521 18.00 457 15.50 394 

JFL-90 Final Filter 5F 10.00 254 11.00 279 8.50 216 

Bag Filter, to 12 in (305 mm) 12B 20.50 521 18.00 457 15.50 394 





Rain Louver/Bird Screen RL 3.50 89 --- --- 3.50 89 

Blower Section BLR 27.00 686 36.00 914 36.00 914 

18

Electronic Cabinet Unit (ECU) 

The ECU manufactured by Purafil protects freestanding 

electronics and electric remote controls from the 

damaging effects of corrosive airborne contaminants. 

Designed for side mounting, the ECU cleans and recirculates 

air within the cabinet and pressurizes the space 

to prevent infiltration of contaminated air. The ECU 

also provides localized protection of individual computers 

or electronic cabinets. 

The ECU is designed for cabinets measuring up to 100 

ft 3 and delivers 100 cfm (170 m 3 /hr) of clean air to the 

protected space. The unit comes standard with a disposable 

MediaPAK Module, which is factory filled 

with Purafil's dry-chemical media. Replacement is 

easy as no special tools or handling of the media are 

required. 

Purafil Electronic Cabinet Unit 

Dimensions 

H W D 


Standard 

Horsepower 

45.00 1143 16.00 406.00 14.00 356 0.10 

Pounds (Kilograms) of Media 

Purafil ® 

Select 

16 

(7.2) 

Purakol ® Puracarb ® 

12 

(5.4) 

15 

(6.8) 

Media 

Volume 

0.5 ft 3 

(0.014 m 3 ) 

# of Prefilters 

PP-30 

1 (12 x 12 x 2 in, 

305 x 305 x 51 mm) 

# of Final Filters 

Varicell 90 

1 (12 x 12 x 4 in, 

305 x 305 x 102 mm) 


• 100 cfm (170 m 3 /hr) 

• Direct drive motor 

• Prefilter and final filter for control of dust 

and particulates 

• Purafil MediaPAK modules for control of 

corrosive gases 


• Variable frequency drive motor 

• Cabinet paint colors to match computer 

or electronic cabinet 

19

Compressor Intake Filter (CIF) 

The CIF is a highly efficient multi-stage air purification 

system that removes gases and particulates to prevent 

corrosion. In the absence of CIF protection, these contaminants 

can cause reduced efficiency, costly repairs, 

and equipment downtime. 

Air moves through the CIF system in several sections, 

each treating the air and removing various airborne 

contaminants. These sections are as follows: 

Purafil Compressor Intake Filter 


• Rain louver/bird screen 

• 12-24 in bag filter 

• 2 or 3 passes of Purafil chemical media in 

disposable MediaPAK modules 

• Plenum with mesh cone 

• 1 or 2 in prefilter 

• 5 or 12 in final filter 


• 12 in HEPA filter 

• Booster fan 

Corrosion of compressor intercooler impedes 

heat dissipation and reduces airflow area. 

The first section of the process is a particulate 

prefilter designed to remove dust and dirt. This 

filter removes particulates 10 microns in diameter 

or greater. The primary purpose of the prefilter 

is to protect the chemical filters and the high 

efficiency final filter. The prefilter retains its 

structural integrity in moist environments, so it 

also serves as a low efficiency mist eliminator. 

The second section is for chemical filtration— 

it is where Purafil dry-chemical media is used to 

remove gaseous contaminants from the airstream. 

The CIF is tracked to house Purafil's disposable 

MediaPAK modules, which are factory filled 

with Purafil media for easy installation and 

replacement. Multiple stages of media may be 

required to eliminate all gases of concern. 

The last section is the final particulate filter. This 

filter is a high efficiency type and removes 

particulates equal to or greater than 1-2 microns. 

The system is manufactured of weatherproofed 14 gage 

galvanized steel. Aluminum double wall, stainless, and 

cold-rolled steel may also be specified. Along with the 

different materials of construction, the CIF can be 

epoxy coated to prevent corrosion on the exterior of the 

unit. The chemical filtration element contains disposable 

MediaPAK modules. 

20

Compressor Intake 

Air Requirements 

Air intake up to 

MediaPAK PK-12 Module: Airflow at 200 fpm (1.016 mps) 

Purafil CIF Sizing 

Bulk-Fill Media Bed, 6 or 12 in Depth: 

Airflow at 100 fpm (0.508 mps) 

cfm m 3 /hr Model # 

Nom. Height Nom. Width Plenum Outlet 

Nom. Height Nom. Width 

ASA Flange 

Model # 

Diameter 

in (mm) in (mm) in (mm) in (mm) 

in (mm) 

Plenum Outlet 

Flange Size 

1500 2549 

CIF 204 

or 402 

23.00 (584), 

47.00 (1194) 

47.00 (1194), 

23.00 (584) 

10.00 (254) CIF 404 47.00 (1194) 47.00 (1194) 10.00 (254) 

1800 3058 

CIF 206 

or 602 

23.00 (584), 

71.00 (1803) 

71.00 (1803), 

23.00 (584) 

12.00 (305) CIF 604 71.00 (1803) 47.00 (1194) 12.00 (305) 

2100 3568 

CIF 206 

or 602 

23.00 (584), 

47.00 (1194) 

71.00 (1803), 

23.00 (584) 

12.00 (305) CIF 604 71.00 (1803) 47.00 (1194) 12.00 (305) 

2600 4417 CIF 404 47.00 (1194) 47.00 (1194) 14.00 (356) CIF 605 71.00 (1803) 59.00 (1498) 14.00 (356) 

3000 5097 CIF 404 47.00 (1194) 47.00 (1194) 14.00 (356) CIF 605 71.00 (1803) 59.00 (1498) 14.00 (356) 

3200 5437 CIF 404 47.00 (1194) 47.00 (1194) 14.00 (356) CIF 606 71.00 (1803) 71.00 (1803) 14.00 (356) 

3500 5947 

CIF 406 

or 604 

47.00 (1194), 

71.00 (1803) 

71.00 (1803), 

47.00 (1194) 

14.00 (356) CIF 606 71.00 (1803) 71.00 (1803) 14.00 (356) 

4000 6796 

CIF 406 

or 604 

47.00 (1194), 

71.00 (1803) 

71.00 (1803), 

47.00 (1194) 

14.00 (356) CIF 706 83.00 (2108) 71.00 (1803) 14.00 (356) 

4500 7646 

CIF 406 

or 604 

47.00 (1194), 

71.00 (1803) 

71.00 (1803), 

47.00 (1194) 

14.00 (356) CIF 608 71.00 (1803) 95.00 (2412) 14.00 (356) 

5000 8495 CIF 606 71.00 (1803) 71.00 (1803) 20.00 (508) * * * * 

5500 9345 CIF 606 71.00 (1803) 71.00 (1803) 20.00 (508) * * * * 

6000 10,194 CIF 606 71.00 (1803) 71.00 (1803) 20.00 (508) * * * * 

7000 11,893 CIF 606 71.00 (1803) 71.00 (1803) 20.00 (508) * * * * 

8000 13,592 CIF 606 95.00 (2412) 95.00 (2412) 24.00 (610) * * * * 

21 

*Note: For airflows from 18,000 to 30,000 cfm, please contact Purafil for information.

Depth Calculation Chart 

Depth 

Prefilter Section Contents 

in 

mm 

1 in (26 mm) Panel 14.50 368 

2 in (51 mm) Panel 14.50 368 

Depth 

Calculating the depth of your CIF system requires that 

the contents of each filter section—prefilter, chemical 

media, final filter, blower and plenum, and rain protection—have 

been determined. Actual unit depth is the 

sum of the depths of each filter section. 

12 in (305 mm) Bag Filter with 1 in (36 mm) Header 23.00 584 



Note: Length is included with the prefilter section. Do not add 6.0 in (152 mm) to unit 

length unless prefilter section is omitted. 

Dry-Chemical Media Section Contents 

MediaPAK PK-12 Disposable Module 18.00* 457* 

Bulk-Fill Media Bed 6 in (152 mm) in Depth 13.50 343 

Bulk-Fill Media Bed 12 in (305 mm) in Depth 19.50 495 

*Note: 18 in (457 mm) length is for the first media section. Two media sections are 34 

in (864 mm) overall. Three media sections are 52 in (1321 mm) overall. 

Final Filter Section Contents 

5 in (127 mm) Rigid Filter with 1 in (26 mm) Header 10.00 254 

12 in (305 mm) Rigid Filter 17.50 444 

The Compressor Intake Filter removes corrosive contaminants 

from the airstream to prevent corrosion of copper intercooler 

tubes. 

Blower and Plenum Section Contents 

Blower Section 30.00 762 

Plenum with Cone 

Varies 

Note: Place blower before chemical section to create positive pressure and avoid 

leakage. 

Rain Protection Section Contents 

Rain Louver with Bird Screen 6.00 152 

Rain Hood 0.68 x H 17.3 x H 

22

Purafil Active Oxidant Impregnated Media 

Media Properties 

Applications 

Removal Capacity 

(min. by weight) 

Flammability 

Life Testable 

Removal Process 

Active Ingredient 

Purafil ® Select 

Purafil ® Select is an activated alumina-based media impregnated with the oxidizer 

potassium permanganate. As a result, it is highly effective at removing sulfur compounds 

from polluted airstreams. Because the media targets a broad range of contaminant 

gases, it is often the last stage in a multi-bed system to remove trace contaminants. 

Hydrogen sulfide: 14%; Sulfur dioxide: 7%; Nitric Oxide: 4.9% 

The media, when clean, does not contribute fuel when attacked by flame and emits 

only negligible amounts of smoke. 

Yes. Purafil offers complimentary analysis of Purafil Select media to project 

remaining life and set a date for replacement. 

Chemisorption: an irreversible reaction between the media's active ingredient and 

the gaseous contaminant, which results in stable chemical compounds bound to the 

media as organic or inorganic salts. 

Potassium permanganate: 8% minimum 

Pellet Diameter 

1/8 in (3.175 mm) 

Bulk Density 50 lbs/ft 3 (800 kg/m 3 ) 

23

Purafil Activated Carbon Media 

Media Properties Purakol ® 




Life Testable 




Purakol ® is a premium-grade activated carbon that targets hydrocarbons, nitrogen 

oxides, volatile organic compounds, and chlorine. The media is used in combination 

with other Purafil media to ensure broad-spectrum removal of contaminants. 

Chlorine: 10%; Nitrogen dioxide: 6.6%; Toluene: 20% 

Not testable 

Adsorption: gaseous contaminants are removed from the airstream and held to the 

media's surface. 

Contains no impregnants 

Not applicable 


24

Purafil Specific Gas Media 





Life Testable 




Purakol ® AM 

Purakol ® AM is a premium-grade activated carbon that contains an acid impregnant 

for the removal of ammonia. 

Ammonia: 7% 

Yes. Purafil offers complimentary analysis of Purakol AM media to project remaining 

life and set a date for replacement. 


the gaseous pollutant, which results in stable chemical compounds bound to the 


Phosphoric acid 

Not applicable 


25

Purafil Blended Media 


Purafil ® Select CP Blend 

Applications Purafil ® Select CP Blend is an even mix by volume of Purafil ® Select and Purakol ® 

media for removal of sulfur compounds as well as hydrocarbons, nitric oxides, and 

chlorine in a single pass. Select CP Blend is the media of choice when space is limited 

but multiple gases are present. 



Flammability 

Life Testable 




Hydrogen sulfide: 14%; Sulfur dioxide: 7%; Nitric oxide: 4.9%; Chlorine: 10%; 

Nitrogen dioxide: 6.6%; Toluene: 20% 

The media, when clean, does not contribute fuel when attacked by flame and emits 

only negligible amounts of smoke. 

Yes. Purafil offers complimentary analysis of Select CP Blend media to project 


Adsorption, absorption, and chemisorption 

Select CP Blend is an even mix by volume of Purafil Select and Purakol media. 

Purafil Select contains at least 8% of the active ingredient potassium permanganate. 

Purakol is a premium-grade activated carbon that does not contain impregnants. 

1/8 in (3.175 mm) 


26

Purafil Impregnated Carbon Media 

Media Properties Puracarb ® 




Flammability 

Life Testable 




Puracarb ® is the primary media for the removal of hydrogen sulfide gas. Hydrogen sulfide 

is common in many industrial applications, including pulp manufacturing, rubber 

manufacturing, steel furnaces, and coke plants. 

Hydrogen sulfide: 20%; Sulfur dioxide: 5%; Chlorine: 8% 

The media, when clean, burns moderately when attacked by flame or emits moderate 

amounts of smoke or both. 

Yes. Purafil offers complimentary analysis of Puracarb media to project remaining 

life and set a date for replacement. 




Potassium hydroxide 

1/8 in (3.175 mm) 


27

Purafil Chlorine-Only Media 





UL Classification 

Life Testable 




Chlorosorb ® II 

Chlorosorb ® II is specifically designed to remove chlorine. The media is most often 

used in chlorine plant applications or in other industries where high concentrations of 

chlorine are present. 

Chlorine: 10% 

The media, when clean, burns moderately when attacked by flame or emits moderate 

amounts of smoke or both 

Yes. Purafil offers complimentary analysis of Chlorosorb II media to project 





Sodium thiosulfate 

1/8 in (3.175 mm) 


28

Notes: 

For more information, please 

contact: 

Purafil, Inc. 

2654 Weaver Way 

Doraville, Georgia 30340 

1-800-222-6367 or 770-662-8545

As a leader in air purification, 

we are committed to the satisfaction 

of our customers 

through the quality of our 

work and the continuous 

improvement of our people, 

products, and systems. 

Purafil cleans the air in a vast array of settings 

worldwide. 

From famous museums to rural water treatment 

plants and every setting in between, we protect 

against the dangers and frustrations of airborne gases. 

With nearly 20,000 global installations, we serve the 

cleanroom, commercial, industrial, preservation, and 

water-wastewater treatment markets. Our experts and 

local, factory-trained representatives go the extra 

mile to offer the best systems and the most comprehensive 

services in the air filtration industry. 

Purafil has revolutionized the air cleaning industry. 

In the early 1960s, we developed and patented 

"Purafil" pellets to remove gaseous pollutants from 

the air in commercial and industrial settings. Since 

then, we have created a wide selection of media to 

eliminate thousands of gases and odors that harm 

people, interrupt manufacturing processes, and 

destroy priceless paintings and artifacts. 

Purafil responds to individual air quality needs 

before, during, and after the sale. 

Since no two gas-phase challenges are exactly alike, 

we tailor our systems to meet specific conditions in 

each application. Before implementing filtration systems, 

we perform air quality assessments to determine 

the best method for removing contaminants. 

From there, we customize units to fit virtually any 

room design, including retrofit situations. We install 

real-time air quality monitors to measure reactivity 

levels, and we conduct several value-added technical 

services to verify system performance. Our local, 

factory-trained representatives examine systems to 

ensure proper maintenance and foster long-term customer 

relationships. 

Purafil has paved the way in the gas-phase filtration 

industry for over 30 years. 

As a leader in air purification, we have the responsibility 

to set standards and conduct research. We play an 

active role in devising contamination control regulations 

in the markets we serve. Our scientists head committees, 

attend scientific forums in various countries, 

and submit articles to international trade journals. We 

are supported by an expansive network of representative 

firms in the United States and over 50 countries 

worldwide. Our collective expertise and intense focus 

are the reasons Purafil continues to lead the industry in 

the development of superior clean air solutions. 

Purafil takes every step necessary to provide quality 

systems. 

Because we manufacture and test our products at company 

headquarters, we have extensive proficiency with 

our systems. We are ISO 9001/2000 certified, so we 

follow rigid guidelines to continually improve our 

products and services. To meet and exceed our high 

standards, we spend a large percentage of annual revenue 

on research and development. 

Purafil has been widely recognized for innovative 

air filtration systems. 

We have received extensive coverage from local, 

national, and international media. We are the proud 

recipient of several prestigious awards, including the 

U.S. Presidential "E" and "E Star" awards for commerce, 

the Fast Tech 50 Award, the World Trade 100, 

and the R&D 100 Award. 

® 

2654 Weaver Way • Doraville, GA 30340 • U.S.A. • Phone: (770) 662-8545 • (800) 222-6367 • Fax: (770) 263-6922 • www.purafil.com

Industrial Application Guide Without UL.qxd - Purafil

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