The BioPak 240 is an American made closed-circuit self-contained breathing apparatus
The BioPak 240 is an American made closed-circuit self-contained breathing apparatus. It recirculates the major portion of the user's exhaled gas. A small oxygen cylinder provides make-up gas to a breathing chamber. The user inhales the gas into a silicone facepiece. The user's exhaled breath passes through a carbon dioxide absorbent and back into the breathing chamber, where fresh oxygen is added. The replenished gas is now available for the next inhalation.
A spring-loaded diaphragm in the breathing chamber maintains the positive pressure in the system. If the user's inhalation fully depletes the breathing chamber, the demand, free flow valve automatically supplies the additional oxygen required. If the user's exhalation causes the diaphragm to fully expand, excess gas is vented out of the relief valve.
A loud, high-pitched, pressure activated whistle alarm sounds when approximately 20-25% service life remains. A manual bypass is provided to override the supply system in an emergency.
In the BioPak 240, a "blue ice" coolant canister is added to the inhalation side of the breathing circuit to cool the breathing gas on the way to the mask.
Biomarine Inc., 456 Creamery Way, Exton, PA 19341. Tel: 610-524-8800; Fax: 610-524-8807.