BD-3 Explosion-Proof Door – 3 bar Explosion Protection for Bunkers and Shelters

The BD-3 explosion-proof door was developed for structures with particularly high safety requirements. It offers tested resistance to explosion overpressures of up to 3 bar (300 kPa / 45 psi). This makes it particularly suitable for bunkers, shelters, military facilities, and critical infrastructure.

The solid steel construction is based on a proven security concept from the vault-building industry. The door was tested by Fraunhofer EMI and meets the requirements of resistance class EPR4 according to EN 13123-1. As a result, the BD-3 offers a high-performance solution for access points that may be exposed to high dynamic loads caused by explosions.

Design and Explosion Protection

The door panel is made of solid steel that is 20 mm thick. This design ensures high rigidity and resistance to deformation. At the same time, the robust construction ensures reliable operation under demanding conditions.

The door is locked using a sturdy 2-point locking mechanism. Solid flat bolts with a cross-section of 20 × 60 mm press the door panel against the perimeter seals. This ensures a secure lock and improved sealing.

In addition, the BD-3 explosion-proof door features a particularly robust hinge design. Both the hinges and the locking mechanism can be completely disassembled. This simplifies transport, installation, and future maintenance.

Waterproofing and Surface Treatment

Perimeter seals improve the seal between the door panel and the frame. This provides additional protection against external influences.

The surface is coated with a corrosion-resistant primer. This serves as the base for an additional powder coating in the desired color. This allows the door to be visually adapted to the requirements of the specific building.

Technical Data

• Model: BD-3
• Product Type: Explosion-Proof Steel Door
• Explosion resistance: 3 bar (300 kPa / 45 psi)
• Resistance Class: EPR4 according to EN 13123-1
• Testing Institute: Fraunhofer EMI
• Door panel thickness: 20 mm
• Door panel material: Solid sheet steel
• Locking mechanism: 2-point locking
• Flat bar: 20 × 60 mm
• Hinges: Sturdy, removable design
• Clear opening: 900 × 2,000 mm
• Minimum required wall opening: 1,055 × 2,100 mm
• External dimensions: 1,156 × 2,218 mm
• Weight: approx. 425 kg
• Sealing: Perimeter seals
• Surface: Corrosion-resistant primer, prepared for powder coating

Optional Features

Additional equipment is available to meet various structural and safety requirements:

• Additional Seal Kit
• Custom Color Selection
• Powder coating according to customer specifications

Applications: Bunkers, shelters, and high-security facilities

The BD-3 explosion-proof door is a key safety component for sophisticated bunker and shelter designs. It was developed for facilities where protection against extreme explosion shock waves plays a critical role.

It complements the structural protective framework, particularly in military facilities, strategic installations, critical infrastructure, and industrial security areas. When combined with appropriately sized walls, ceilings, and other protective components, the BD-3 can be integrated into comprehensive security concepts.

With its solid steel construction, certified EPR4 resistance class, and explosion resistance of 3 bar, the BD-3 offers a high-performance access solution for structures with the most stringent protection requirements.

Consulting and Project Planning

The selection and installation of an explosion-proof door require careful coordination with the existing building structure. The wall opening, installation conditions, mounting, and adjacent components must all be coordinated.

BSSD provides support in selecting suitable shelter components and planning customized safety solutions.