Refuge Chamber with Airlock System

AYSAN Mine Refuge Chambers can include a separate double-door airlock and flushing system as a feature.

The airlock system is designed to remove any contaminants that may be brought in during the entry, in addition to the positive pressure provided in both standard and airlock safe havens.

The compressed air is discharged into the airlock via a ball valve fitted with an auto-muffler (airlock flush valve) which is opened on first entering the airlock. The airlock includes one-way check valve that vents from the airlock to the atmosphere, continually over-pressurizing the airlock.

Three high-pressure compressed breathing air cylinders provide backup flushing if the mine air fails or becomes contaminated. The cylinders are connected to a high-pressure manifold and activated by pressing and holding the pneumatic button. The first person to enter the airlock must open the cylinders and prepare the regulator for occupants who enter the airlock.

To ensure the rescue chamber's overall functionality in an emergency, toxic gases must be slowed or prevented from entering. Whenever the door is opened for entry, the chamber's internal environment can potentially be compromised. It is possible to reduce the risk of intrusion by installing an airlock in the chamber.