The BVNO 1000 blast valve is a normally open, double-acting valve. It allows air to enter and exit the protected area and automatically closes the air opening under blast wave pressure, thereby protecting the interior from both the positive and negative phases of the blast wave.These valves are designed to be installed in wall ventilation openings or as part of an air duct in civil defense shelters, bunkers, safe rooms, containers, industrial facilities, and other applications. BVNO 1000 valves have been tested and certified according to the SI4570 standard. The valves are extremely durable, can withstand a wide temperature range, and are corrosion-resistant. The valves offer easy installation options for pre-installed wall sleeves, retrofitted flanges, air ducts, or other configurations. The valves can be equipped with a pre-filter to remove dust particles and are available in various configurations for in-line connections, special flanges, quick-connect fittings, and more.
Normally open, double-acting, automatic
Maximum pressure rating: >2000 (20) kPa (bar)
Working pressure: >900 (9) kPa (bar)
Nominal airflow: ~1,000 m³/h
Nominal pressure drop: 200 Pa
Mechanical shock resistance: >12 g
Wall mounting: 8-inch flange
Optional Configuration
8Y – valve only
8YZ – Flanged-outlet valve only
8X – Valve with pre-filter
8L – with pre-filter, 90-degree outlet
8Z – with pre-filter, in-line outlet
