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BVNO 2600 Blast Valve: High-Capacity Automatic Blast Protection Valve for Shelters and Protected Ventilation Systems

Sep 23
3 min read

Modern civil defence shelters, bunkers and protected facilities require ventilation systems capable of maintaining continuous airflow while automatically protecting occupants during blast events. The BVNO 2600 Blast Valve is a normally open, dual-action automatic blast valve designed to permit unrestricted airflow during normal operation and automatically close when exposed to blast wave pressure. According to the manufacturer, the valve protects the internal space from both the positive and negative phases of a blast wave while remaining suitable for long-term installation in demanding environments.

Official product page:


Product purpose

According to the manufacturer, the BVNO 2600 is intended for installation in:

  • civil defence shelters;

  • bunkers;

  • safe rooms;

  • protective containers;

  • industrial facilities;

  • protected ventilation systems.

The valve is designed to automatically isolate the ventilation opening during blast events while allowing normal ventilation during standard operating conditions.


Operating principle

The BVNO 2600 is described by the manufacturer as a normally open, dual-action automatic blast valve.

During normal operation the valve:

  • allows fresh air to enter the protected area;

  • allows exhaust air to exit freely;

  • maintains unrestricted airflow through the ventilation system.

When subjected to blast pressure:

  • the valve automatically closes;

  • airflow is immediately interrupted;

  • the protected space is isolated from the blast wave;

  • protection is provided against both positive and negative blast pressure phases.

According to the manufacturer, the automatic protective action does not require an external power supply.


Applications

The manufacturer recommends the BVNO 2600 for:

  • civil defence shelters;

  • bunkers;

  • safe rooms;

  • industrial buildings;

  • protected containers;

  • ventilation duct systems;

  • other protected facilities requiring blast protection.

The valve may be installed directly into ventilation wall openings or integrated within ventilation duct systems.


Main technical specifications

According to the official Shelter-Shop product information, the BVNO 2600 has the following specifications:

Parameter

Specification

Valve type

Normally open, dual action, automatic

Nominal airflow

≈ 2600 m³/h

Maximum pressure durability

>2000 kPa (20 bar)

Practical pressure durability

>900 kPa (9 bar)

Pressure drop @ nominal airflow

200 Pa

Mechanical shock resistance

>12 g

Wall connection

8-inch flange

These specifications are published by the manufacturer on the official product page.


Construction and durability

According to Shelter-Shop, the BVNO 2600 is engineered for demanding operating conditions.

The manufacturer states that the valve:

  • is highly durable;

  • resists corrosion;

  • withstands a wide operating temperature range;

  • is intended for long-term operation in protected environments.


Installation options

According to the manufacturer, the valve supports installation using:

  • pre-installed wall sleeves;

  • retrofit flanges;

  • ventilation ducts;

  • inline installations;

  • special flanges;

  • quick connector configurations.

These installation options allow integration into both new construction projects and existing protected ventilation systems.


Optional configurations

The manufacturer indicates that the BVNO 2600 may be supplied with optional features, including:

  • integrated pre-filter;

  • dust particle filtration;

  • inline connection versions;

  • special flange configurations;

  • quick connector options.

These configurations allow the valve to be adapted for different ventilation system layouts.


Testing and certification

According to the manufacturer, the BVNO 2600:

  • has been tested;

  • is certified in accordance with SI4570;

  • is intended for blast protection applications in protected facilities.

The certification information is published on the official product page.


Integration into ventilation systems

The manufacturer states that the BVNO 2600 is designed as a component of protected ventilation systems where automatic blast isolation is required while maintaining normal airflow during everyday operation.

Typical applications include integration with:

  • blast-resistant ventilation systems;

  • shelter ventilation equipment;

  • CBRN air filtration systems;

  • protected air duct networks;

  • safe room ventilation systems.


Conclusion

According to the manufacturer, the BVNO 2600 Blast Valve is a normally open, dual-action automatic blast valve developed for civil defence shelters, bunkers, safe rooms, containers and industrial facilities. Published specifications include an approximate airflow capacity of 2600 m³/h, maximum pressure durability exceeding 2000 kPa (20 bar), practical pressure durability above 900 kPa (9 bar), a nominal pressure drop of 200 Pa, mechanical shock resistance greater than 12 g, and an 8-inch flange wall connection. The manufacturer also states that the valve is tested and certified to SI4570 and supports multiple installation and configuration options for integration into professional protected ventilation systems.


 
 
 

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