Plus and PSS Series - Lung Demand Valve
tm 1285.001 - August 2001
5:18
5.8.2 Fitting Air Transfer Block Assembly – Lever Height Setting
Tools required
Plate Spanner R26817
No. 2 Posi-Drive Screwdriver 3331245
Molykote 111 Grease 3331241
Ball End Setting Tool (1.5mm) 3310676
Height Gauge 3310675
AE and N
Assembly Tool 3310664
Connector Tool 3310679
Refer to Figure 19.
1 Type A and AE demand valves
- Press re-set lever to lift and lock
the lever in the positive pressure
‘off’ position.
2 Insert the main pivot lever (2)
through the outlet of the body
of the lung demand and locate
then push the housing of the air
transfer block assembly (1) into
the bore ensuring the flange of
the housing is fully inserted.
Types A and AE demand
valves:- while holding the
housing of the air transfer block
assembly (1) into the bore -
check the function of the
positive pressure mechanism as
follows - press the main pivot
lever to release the positive
pressure mechanism then press
re-set button (3) to switch ‘off’
positive pressure mechanism. If
satisfactory proceed as follows.
3 Locate and position the correct
injector pipe as shown in Fig. 20
then hold body of lung demand
valve with the injector pipe in the
vertical position and assemble
the connector as follows.
Fig. 19
1141
1
2
3
1139
Fig. 20
Push-in Type - A
Inspect and if necessary fit new O-ring to connector then screw
connector into demand valve body. Tighten until flange of connector
contacts the body of the demand valve. Do Not overtighten.
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