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    USA: (800) 799- 4609
    Intl: (713) 690- 2153
    Fax: (713) 690- 7872
    Sentry Air Systems, Inc.
    21221 FM 529
    Cypress, TX. 77433
    Located near Houston? Request a free on-site consultation.

    Cleanable & Reusable Portable Fume Extractor

    Roundaire Micro-Pleat Series 2
    Model # SS-300-RND-PFS
    Welding Fume Extractor - Including Hexavalent Chromium
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    The Model 300 Roundaire Micro-Pleat mobile fume extractor is designed to protect the operator’s breathing zone from harmful airborne fumes and particulates found in many industrial settings due to welding, metal working, solvents, powder handling and chemicals. Capable of providing up to 725 CFM of air volume this system facilitates the capture of pollutants at the source before they contaminate the larger work space.

    This system is equipped with a round, cleanable and reusable Micro-Pleat Series 2 Particulate Filter that is cleaned by applying pressurized air to the filter while still in the unit’s chassis. The operator simply sprays air onto the surface of the filter media to clean and rejuvenate it, while excess dust and waste falls into the internal dust pan, allowing for simple and clean debris removal. Due to the round filter design, the unit offers greater capture area by avoiding corner dead space commonly found in non-round units. 

    The compact, light-weight Model 300 Roundaire comes with a sturdy portability handle and four industrial-grade locking casters; making moving this unit virtually effortless. Other standard features include a Variable Speed Control and Magnehelic Gage. The Variable Speed Control offers a wide gradient of power settings between 480 and 725 CFM while the Magnehelic Gage tracks filter resistance by measuring differential air pressure within the filter/fan chassis; letting the operators know when it is time to clean the filter.

    Another cleanable system is our Model 500 Industrial Fume Extractor.

    Welding Fume Extractor - Including Hexavalent Chromium Welding Fume Extractor - Including Hexavalent Chromium

    No self-cleaning components - Self-cleaning units often require a handful of parts that are required for the self-cleaning mechanism to work. These parts are often consumables as they tend to wear down and break which adds to the overall lifetime cost.
    Roundaire Benefit: With no self-cleaning components this unit will save thousands in potential lifetime costs.

    Quick and quiet cleaning - The mechanism used in self-cleaning units often stores pressurized air then rapidly releases it onto the filter creating loud, distracting noises.
    Roundaire Benefit: Cleaning the filter only requires about 3-5 minutes and the air applied by the operator is relatively quiet when compared to traditional self-cleaning units.

    Filter resistance gage - Self-cleaning units may automatically clean the filter even if it’s unnecessary. This causes wear-and-tear on the cleaning components and may burst the filter. 
    Roundaire Benefit: The magnehelic gage tracks filter resistance, allowing the operator to determine when the filter needs cleaning.

    Easy to access filter - Many self-cleaning units have the filter enclosed in a chassis which makes accessing the filter difficult and cumbersome.
    Roundaire Benefit: The exposed filter design is protected by a mesh screen which makes accessing the filter to clean it virtually effortless. 

    Cabinet Dimensions:

    24.75” diameter
    30” height, with plenum attached

    Arm Dimensions:

    6" Round x 72" Long fire retardant flex hose


    70 lbs.

    Cabinet Material:

    ABS Plastic & Aluminum


    Fractional Horsepower

    Available Filters:

    Round MERV 16 Micro-Pleat Series 2 Particulate Filter
    32lb Refillable Cartridge w/ Activated Carbon

    32lb Disposable Cartridge w/ Activated Carbon

    Air Volume:

    Variable Speed Control Standard on 115V
    725 CFM High, Down to 480 CFM Low
    On/Off Toggle Switch Standard on 220V


    115/1/60, 2 amps
    220/1/50, .75 amps

    Sound Level:

    62 dba @ 3'


    Limited two-year warranty from date of shipment on defects due to materials or workmanship.

    Patented Design:

    Patent pending 13/463, 347

    All specifications are nominal and subject to change without notice. Not intended for explosive or highly flammable applications. (i.e. when the Lower Flammability Limit is exceeded for any given chemical). Please consult the specific MSDS for questions regarding flammability limits. *Results may vary depending on application and appropriate use of equipment.

    Spark Reducer
    Reduces sparks from entering the unit.

    100 Series (Up to 80 CFM)
    200 Series (Up to 100 CFM)
    300 Series (Up to 350 CFM)
    400 Series (Up to 700 CFM)
    450 Series (Up to 950 CFM)
    500 Series (Up to 1300 CFM)
    Extractor Arms (Exhaust Hoses)
    Accessories (For All Products)

    Additional Configurations Cleanable Filter Models

    Particulate Heavy-Duty
    Fume Extractor
    Particulate Heavy-Duty
    Fume Extractor
    Heavy-Duty Dual Hose
    Fume Extractor
    Roundaire w/
    Cleanable Filter
    Roundaire Python
    w/ Cleanable Filter

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    Sentry Air Systems, Inc is a registered trademark of Sentry Air Systems, Inc. Houston TX

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