Industrial Air Filtration Technology
Specialized Air Filters For Industrial Applications

By Richard Carrow (Danforth Air Filtration & Air Purification Division, Buffalo, NY)

Industrial air filtration applications usually place great demands on air filter media and require specialized air filters to ensure satisfactory performance. Optimum air filter choice depends upon the particular environmental conditions of exposure, including; air temperature, airborne grease or oil content, commercial dust and very fine particulate content, VOC content, and air velocity.

Purolator Industrial Air Filters
Danforth Indoor Air Quality Division... And ...Danforth Air Filtration And Air Purification Division Work In Concert To Help Maintain Your HVAC / Air Filters / Air Purifiers, And Coordinate Required Periodic Testing And Preventive Maintenance On All Air Filtration & Purification Devices In WNY / Upstate New York / New York State

Industrial Air Filter Types
Industrial air filtration applications can require:

  • High Temperature (HT) Air Filters - for continuous application above 180oC (356oF)
  • Grease Filters - for commercial kitchen, restaurant and food industry air filtration
  • Industrial Dust Collector Systems - for removal of fine airborne particulates
  • Industrial Grade HEPA Filters - for removal of very fine particulates in cleanroom and other specialized institutional, commercial and industrial air filtration applications
  • Activated Carbon Industrial Air Filters - for industrial air filtration systems that must remove Volatile Organic Compounds (VOC’s), gases, odors, etc.
  • High Velocity and Gas Turbine Filters - for extreme airflow industrial air filtration
  • There are many more products within the industrial air filtration group, but our discussion here will focus mainly on these commonly applied types of industrial air filter.

    Purolator Serva Cell HT Filter
    Purolator
    SERVA-Cell®
    High Temperature
    ’Rigid Box’
    Air Filter

    High Temperature (HT) Air Filters
    Most air filters are designed to operate at near ambient temperatures. Both the design and the construction materials require modification to allow for high temperature industrial filtration applications.

    In High Temperature (HT) Air Filters, the filter media, gasket, filter frame and all adhesives require modification. HT Air Filters are designed for continuous operation in industrial air filtration applications above 180oC (356oF).

    HT Air Filters are commonly used on the air intake of process drying ovens, baking ovens, etc. HT filters are Class 1 Fire Rated - Underwriters Laboratories listed Standard 900 for industrial air filtration application.

    Purolator Baffle Grease Filter
    Purolator Baffle Grease Filter

    Grease Filters For Air Filtration
    Air filters in cooking ventilation hoods and devices are designed and installed to prevent grease and condensation from collecting on walls, ceilings, fire suppression piping and from dripping into food or onto food surfaces.

    All hoods should comply with an ANSI accredited certification program and be designed in conformance to the Ventilation Control and Fire Protection Association Bulletin 96, and/or other applicable safety codes.

    Metal Washable Grease filters are designed to be permanent and cleanable, and are available in Stainless Steel or Galvanized construction. When the filter is caked or laden with considerable grease, soaking and cleaning with commercial detergent is required.

    Baffle-type grease filters are highly efficient flame arresters. Cooking flare-ups are restricted from entering the kitchen exhaust ducts, as the flame cannot effectively follow the airflow pattern through the baffles within the air filter.

    Purolator Defiant Bag Filter
    Purolator DEFIANT®
    Bag Filter

    Industrial ’Dust Collectors’
    General and industrial source-controlled air filtration operations typically use Dust Collector systems. Industrial processes can produce large quantities of airborne particulate pollutants, and reducing these contaminants to acceptable levels is often critical for the safety of personnel and mandatory to meet stringent emission regulations.

    Industrial dust collector air filtration systems must usually remove very fine particulates from commercial & industrial processes, and are often custom designed for a given application. Dust collector designs range from small, commercial units to large industrial air filtration systems that may even remove toxic ’dust’.

    Purolator Ultra Cell HEPA Filter
    Purolator
    ULTRA-Cell®
    High Efficiency
    HEPA Filter

    Very Fine Particulates
    The ability of a filter to remove particles in different size ranges is usually assessed by MERV rating.
    More About MERV Ratings

    Complete removal of very fine particulates in industrial cleanroom, electronic, pharmaceutical and other specialized manufacture requires air filtration with MERV rating from 17 to 20. Thus, HEPA filters are specifically recommended for fine particulate type industrial air filtration.
    HEPA Filters In Biological Safety Cabinets
    HEPA Filters In Pharmaceutical Applications
    HEPA Filters In Surgical Applications
    HEPA Filters In Other Healthcare Applications

    Purolator Puro Cell Carbon Loaded Rigid Box Filter
    Purolator
    PURO-Cell®
    ’Rigid Box’
    Air Filter

    Filtering Out Volatile Organic Compounds & Other Chemicals
    Activated Carbon Filters are specifically recommended for industrial air filtration systems that must remove VOC’s, chemical aerosols, certain gases, and odors, from the air.
    More About Activated Carbon Filters
    VOC’s Removed By Activated Carbon Filters
    More About Selection Of Carbon Filters

    Specialized air filters are available to fit industrial and commercial Paint Booths.
    Paint Booth Filters Catalog

    Purolator Serva Cell High Velocity Air Filter
    Purolator
    SERVA-Cell®
    Gas Turbine
    ’Rigid Box’
    Air Filter

    High Velocity Air Filtration
    ’High Velocity’ (HV) or ’Gas Turbine’ (GT) air filters are designed to operate in high velocity and turbulent air applications, where standard pleated filters would fail. By "beefing up" the construction of a standard pleated filter, the HV or GT filter can withstand considerably more airflow, as required in many industrial air filtration applications.

    The Purolator SERVA-Cell® GT ’Rigid Box’ Filter provides medium / high efficiency filtration in high-velocity or turbulent airflow conditions, up to 2500CFM.
    Flanders Pre-Pleat HV Information

    Summary
    Industrial air filtration applications usually place great demands on air filter media and require specialized air filters to ensure satisfactory performance. Optimum air filter choice depends upon the particular environmental conditions of exposure, including; air temperature, airborne grease or oil content, commercial dust and very fine particulate content, VOC content, and air velocity.


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    Indigo Air Filters


    Austin Air Purifiers

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    Mobile Air Purifiers Are Highly Recommended For Removal Of Industrial Particulates, Odors & Gases That May Enter Adjacent Office Areas Through A Shared HVAC System:

    Austin Air Purifier - Allergy Machine
    Mobile Austin Air Purifiers

    Austin Air Purifier Catalog

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    Danforth also conducts HVAC system assessments and provides a detailed 3rd party report using our Aircuity™ HVAC monitoring and assessment equipment.


    Danforth Is An Active NAFA Member With Over 20yrs Experience In Commercial & Industrial HVAC Air Filtration.

    We Can Help You Design And Maintain The Right Industrial Air Filtration Or Purification System For Your Manufacturing Operation.

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