Dräger PSS Series User Manual

Plus and PSS Series - Lung Demand Valve
tm 1285.001 - August 2001
5:17
7 Remove Air Transfer Block and
Balanced Piston Assembly (1)
Fig. 17 as follows:
Types A and AE - Press re-set
button to switch ‘off’ positive
pressure.
Types A, AE and N - Using two
fingers either side of the air
transfer block push the Air
Transfer Block Assembly from the
outlet of the lung demand
valve.
8 Refer to Fig. 18. To remove the
balanced piston unit from the air
transfer block grip the air transfer
block and as shown insert ball
end setting tool through slot in
the main lever and against the
end face of the balanced piston
housing. Press in direction of
arrow to push and extract the
balanced piston unit.
As necessary scrap either the air
transfer block or balanced
piston unit.
9 Check that the pivot lever (1) is
in the correct position (see
Fig. 18) then re-assemble new air
transfer block or new balanced
piston unit as required. Inspect
O rings (2) and (3) and replace
with new if necessary.
1222
1
2
Fig. 18
3
1141
Fig. 17
1
2
3
Important Note: Checking and possible re-adjustment of the main lever setting
height will be required following the fitting of a replacement balanced
piston unit to an existing Air Transfer Block, or the fitting of a replacement
Air Transfer Block to an existing balanced piston unit.

Dräger PSS Series Specifications

General

Type	Self-Contained Breathing Apparatus (SCBA)
Material	Stainless steel
Breathing Gas	Compressed air
Duration	Varies by cylinder capacity and breathing rate
Cylinder Material	Aluminum or composite
Communication	Integrated communication system (optional)
Operating pressure	Up to 300 bar (4350 psi)