Accessories and Optional Equipment: Description and Operation

BT86.10-P-0001-01A Valve Head For Emergency Fresh Air System Changed
MODEL 221.### ## as of 384391
- with CODE (Z07) Top protection
- with CODE (Z25) Emergency fresh air system with equipment carrier plate








Diagram left
Valve head, old status.:
Pressurized gas cylinder, manufacturing date up to 30.11.10 or with old valve head and switchable pressure medium reservoir solenoid valve for emergency fresh air system (Y128)

Diagram right
Valve head, new status:
Pressurized gas cylinder, manufacturing date as of 01.12.10 or new valve head and one-time cap (metal plate with pin pusher = pyrotechnical ignition).





Information sign with pressurized gas cylinders, manufacturing date as of 01.12.10 or with new valve head and one-time cap.

On pressurized gas cylinders with new valve head, maintenance every 2 years is not required.
Replace (old) switchable solenoid valve (Y128) with one-time cap (metal plate with pin pusher). When activated (actuated), the metal plate is punched by the pin (pyrotechnical ignition) and air flows until the bottle is empty.
The electrical connections are identical and the bottles are interchangeable.
Observe information sign on pressurized gas cylinders with new valve head and one-time cap.