BVNC 40 Archives - Bunker Builders https://www.bunkerbuilders.com/product-tag/bvnc-40/ Fri, 12 Dec 2025 12:10:06 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.bunkerbuilders.com/wp-content/uploads/2025/10/logo-coming-soon-300x300-1-150x150.png BVNC 40 Archives - Bunker Builders https://www.bunkerbuilders.com/product-tag/bvnc-40/ 32 32 BVNC 40 – Overpressure Blast Valve https://www.bunkerbuilders.com/product/bvnc-40-overpressure-blast-valve/?utm_source=rss&utm_medium=rss&utm_campaign=bvnc-40-overpressure-blast-valve https://www.bunkerbuilders.com/product/bvnc-40-overpressure-blast-valve/#respond Fri, 12 Dec 2025 12:10:06 +0000 https://ffb.ios.mybluehost.me/website_81fe6ff5/?post_type=product&p=802 BVNC overpressure valves – normally closed valves designed to maintain or control the differential pressure level in the shelter by releasing the air from the gastight shelter while offering providing protection from external blast wave pressure. BVNC overpressure valves were developed for use in civil defence shelters, bunkers, safe rooms and other protected spaces.​ BVNC line […]

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BVNC overpressure valves – normally closed valves designed to maintain or control the differential pressure level in the shelter by releasing the air from the gastight shelter while offering providing protection from external blast wave pressure.

  • BVNC overpressure valves were developed for use in civil defence shelters, bunkers, safe rooms and other protected spaces.​

  • BVNC line of valves includes a wide range of valves for different airflows.

  • BVNC are automatic action valves designed to protect from external blast wave pressure.

  • BVNC designed for controlled release of air from the shelter when positive pressure (overpressure) rises to required level.

  • The valves are extremely durable and can operate in a wide range of temperatures and resistant to corrosion.

  • The valves are designed for installation on ventilation openings or as part of the duct.

BVNC 40 – Overpressure Blast Valve

  • Reflected blast pressure durability (operational): >900 kPa

  • Nominal airflow: 40 m3/h

  • Pressure drop @ nominal: 200 Pa

  • Mechanical shock resistance: >12 g

  • Standard flange: 4 Inch

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