Head of a closed-circuit diving breathing apparatus (rebreather)

A head (2) of a closed-circuit diving breathing apparatus (rebreather) comprising a body (5), tightly seated through

• a flange (5a) by means of
• a retaining ring (3) in
• a canister of
• an absorbent bed (4) equipped with
• a filling port aperture (4e) plugged with
• a plug with a spring (4d), and
• an upper air channel (4b) and
• a lower air channel (4c), provided with at least
• one bayonet connector (6), at least
• one oxygen connector (7), at least
• one diluent gas connector (9) or at least one dive computer connector (10) and in the body
• (5) of the head (2) there is
• an opening connected to the inside of the body constituting
• a mounting seat (29) of
• a button (20) and
• an opening connected to the inside of the body constituting
• a chamber (13) of
• an over pressure relief valve (12), characterized in that that the over
• pressure relief valve (12) contains, in sequence,
• a valve piston (14),
• a spring (15),
• a seat of the one-way valve (16) and
• a one-way valve (17), the spring (15) supported on the seat of the one-way valve (16) pushes the valve piston (14) to the body (5) of the head (2), the one-way valve (17) is attached in the seat of the one-way valve (16) and all components are attached to the body (5) of the head (2) by means of
• a plug with
• openings (18), the connection of which to the body (5) is sealed with
• an o-ring (19).