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BVNC 40 - Overpressure Blast Valve

BVNC 40 overpressure blast valve is a normally closed valve designed to maintain and control the differential pressure levelsin the shelter and protect the internal space from the blast wave pressure coming from outside.

The automatic action of the valve which are normally closed, is to release the air from the shelter when the overpressure reaches the predefined positive pressure (overpressure) levels.

  • BVNC overpressure valves were especially 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.

Main Specifications

  • 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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