BREATHING APPARATUS

composed of:

1. back plate with harness;
The harness assembly is complete with shoulder pads and waist belt, fitted with special sliding buckles to ease adjustment. 1. cylinder mounting kit
shoulder strap
hose retainer
back plate
waist strap
buckle adjustable part
clamp assembly
2. cylinder
periodic testing ,
refilling

　
cylinder rubber boot
cylinder valve
handwheel
dust plug
sealing tape
handle section
3. pressure reducer
deliver a constant pressure of 5.5 bar irrespective of cylinder pressure.
As cylinder pressure drops to 55+/-5 bar, a unique device actuates the audible warning
3. pressure regulator unit

4. pressure gauge with high pressure hose

　
regulator hose
high pressure hose
breathing hose
quick coupling connection
5. face mask (with speech diaphragm)
consists of:
breathing valve
visor frame assembly
visor
mask body
locking strap
neck strap with buckle
head harness
(speech diaphragm assembly)

black lever on breathing valve

**** calculate the quantity of free air:
eg. one 3-litre cylinder charged to 30MPa (300 barf) contains 3*300=900 litres of free air.
average comsuption is 40 litre per minute.

**** don apparatus: