Pressure Relief Vents

SGV Dual Flo®

Select a product information:
    • EWCL5 with 3 hour fire resistance to BS EN 1364-1
    • BSRIA free vent area validation
    • True 2-way venting
    • Operating range: 100 pascals upward
    • Serial Number Traceability
    • 10 Year Warranty as Standard

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    Market-leading free vent area for a pressure relief vent designed specifically for Synthetic Gas Fire Suppression Systems. These systems utilise agents such as FM-200 and Novec 1230 which cool and breakdown the chemical reactions found in a fire producing both negative and positive pressurisation during a system discharge. No other vent on the market has the excellent 2-way performance characteristics the Apreco SGV gives you.

    To overcome the potential of structural damage the SGV vent Blades operate in both directions with the built-in ability to adjust the pressure setting. The Vents are offered in a number of standard sizes for installation in both internal and external walls. Providing market-leading performance across a range of pressures all of which has been independently verified by third parties.

    A control device holds the individual blades closed to allow room pressure integrity tests to be carried out effectively. It also enables universal installation with the ability to position the Vent either vertically, horizontally or angled with the same performance. 

    No other dual flow vent on the market has this flexibility.

    The vents are designed to start opening at 80Pa and fully open at 125Pa, this allows annual integrity room tests to be performed without the need to block the vents during such a test.

    The SGV has been successfully tested at EXOVA Warrington Fire following the performance test criteria of BS EN 1364-1, achieving 4 hours fire resistance.

    The SGV also carries EW120 Fire Resistance Classification to BS EN 13501-2.

    The SGV is the first halocarbon Gas Pressure Relief Vent in the world that has been certified to EWCL5.

    Click here to find out more on EWCL5 certification.

  • Demand for Apreco inert gas vents

    Demand for Apreco inert gas vents is increasing with the recognised need for over and under pressure venting associated with Inert and Synthetic Gaseous Fire Suppression Systems.

    Buildings are most commonly designed to withstand internal pressures of between 250 to 500Pa, though this can vary depending on the type of construction. The use of correctly sized and functioning pressure relief vents will protect such building structures from damage.

    Apreco inert gas vents are of ‘counter-weighted’ design to prevent the risks of over and under pressurisation resulting from the use of gas fire suppression systems. The Apreco range of pressure relief vents have been successfully tested to EN1364-1 criteria to provide a 4-hour fire resistance rating.

    Specifically developed for these applications, the range can be used alongside a wide range of gas fire suppression systems to prevent structural damage and risk to personnel.

    Maximum room pressure is controlled by the vents opening to allow air to escape, then closing when discharge is complete. This maintains the dilution of the air, so preventing re-ignition.

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  • Vent Sizes

    Standard stock models shown and sized. Bespoke sizes available upon request

    Model Free Vent Area
    (FVA m2)
    Nominal Size
    (W x H mm)
    Maximum size*
    (W x H mm)
    Aperture size
    (W x H mm)
    Weight**
    (Kg)
    SGV-0301 0.024 Internal
    0.024 External
    300 x 100 440 x 250 360 x 170 3.0
    SGV-0501 0.040 Internal
    0.040 External
    500 x 100 640 x 250 560 x 170 7.5
    SGV-0303 0.078 Internal
    0.059 External
    300 x 300 440 x 450 360 x 370 8.0
    SGV-0505 0.220 Internal
    0.163 External
    500 x 500 640 x 650 560 x 570 17.0
    SGV-0707 0.434 Internal
    0.220 External
    700 x 700 840 x 850 760 x 770 26.0
    SGV-1010 0.891 Internal
    0.650 External
    1000 x 1000 1140 x 1150 1060 x 1070 43.0

    * Cover Grille maximum dimensions are 10mm greater than the stated SGV Vent maximum size.
    ** Weights are indicative and relate to SGV Vent and Wall Liner combined.
    Standard Internal wall depth coverage is 140 to 220mm (External 220 to 240mm) extension Sleeve(s) can be added in 75mm increments.

  • Internal Wall Installation

    Internal-600

    This typical installation consists of:
    2 x Cover Grilles
    1 x SGV Vent
    1 x Wall Liner

    External Wall Installation

    External-600

    This typical installation consists of:
    1 x Cover Grille
    1 x SGV Vent
    1 x Weather Louvre or Weather Cowl Kit

    Deep Wall Installation

    Deep-600

    This typical installation consists of:
    2 x Cover Grilles
    1 x SGV Vent
    1 x Extension Sleeve
    1 x Wall Liner

    Narrow Wall Installation

    Narrow-600

    This typical installation consists of:
    2 x Cover Grille
    1 x SGV Vent
    1 x C-Frame Kit
    1 x Wall Liner

  • SGV Data Sheet

    Category: Data Sheets Filetype: pdf

    SGV Drawing

    Category: Drawings Filetype: pdf

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A few of our Clients who’s assets & personnel are protected by Apreco products. View all clients
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