Closed Circuit Draeger FGGIII

This is the basic layout of the internals showing the previously mentioned counterlungs, the new scrubber, two 20cu.ft cylinders, two Apeks T50D regulators, and the electronics housing (the silver enclosure near the bottom).

Here the scrubber and electronics enclosure have been removed. The screw connections on the breathing bags are clearly visible, as are the regulators and associated plumbing. The single hose from the diluent cylinder (right), goes to the diluent Air2. On the O2 cylinder (left), the lower hose goes to the O2 Air2, and the upper hose goes straight to the top of the scrubber. You can see the quick disconnect on the end which plugs onto the scrubber top to supply O2 to the solenoid. The quick disconnect by the breathing bag connectors is the O2 feed from the manual addition valve which also plugs into the scrubber top. Also note the diluent quick disconnect going into the inhalation bag underneath the breathing bag connectors.

This is the electronics housing. It is made from aluminium, and the lid is o-ring sealed. The large blue hose goes to the scrubber and carries wiring for the three O2 sensors and the solenoid. The large black hose goes to the display housing, and the small black cable goes to the Heads Up Display. All the electronics are open to ambient pressure. This is one thing I will change, making them all at atmospheric.