Gas Filter GF-40

Gas Filter GF-40 – ABC Protection Filter for Shelters

The GF-40 gas filter reliably protects occupants in shelters against nuclear, biological, and chemical (NBC) contamination. It prevents the ingress of radioactive dust, biological aerosols, and chemical pollutants, thereby ensuring a safe and controlled air supply.

Contaminated outside air is drawn in by a fan and initially passes through a particulate filter, where radioactive particles and biological agents are effectively retained. The air is then purified by an activated carbon gas adsorption filter, which removes chemical contaminants. As a result, only filtered air enters the shelter.

Design and Construction

The GF-40 gas filter features a robust, powder-coated steel housing designed for long-term use in civil and governmental shelter systems. Its compact design allows secure floor mounting and seamless integration into existing ventilation systems.

Standards, Certification, and Type Approval

The GF-40 gas filter complies with the regulations of the Federal Office for Civil Protection (BABS).
Type testing is conducted by the Swiss Federal Department of Defence (VBS).

Approvals (depending on manufacturer): BZS T 76-003; BZS T 88-013

BSSD ensures that only tested and approved gas filters are used in shelter systems.

Integration into Ventilation Systems

The GF-40 gas filter is designed as a system component of the VA-40 ventilation unit. It operates in conjunction with the VA-40 and provides the gas filtration stage for NBC protection within the system. This makes the GF-40 an integral part of the filtered air supply during gas filter operation.

In particular, the combination of the VA-40 ventilation unit and the GF-40 gas filter ensures compliant switching from fresh air mode to gas filter mode in accordance with BABS requirements.

Technical Data

• Airflow rate: 40 m³/h

• Pressure drop: 370–420 Pa

• Housing material: powder-coated steel

Individual Consultation for Gas Filters

Our experts support you in selecting the appropriate gas filter for your shelter system. Contact us to determine the optimal solution for your project.