Bauer Junior II-B-F01 - General Information; Compressor Purpose, Design, and Air Flow

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Instruction Manual  Junior II
1
1. GENERAL
PURPOSE
The JUNIOR II breathing air compressor is designed to com
press air for breathing as required in diving applications. The
max. allowable operating pressure (adjusted pressure on final
pressure safety valve) is 225 bar or 330 bar.
DESIGN
The compressor unit comprises the following major assem
blies:
- compressor block
- drive motor
- filter system P21
- filling assembly
- base plate and frame
The design of the compressor system is shown in Fig. 1 to
Fig. 4.
AIR FLOW DIAGRAM
See Fig. 5 . The air is drawn in through telescopic tube
(necessary for units with petrol engine) -1, intake filter -2;
compressed to final pressure in cylinders -3, -4, -5; recooled
by intercoolers -6, -7, and aftercooler -9. The pressures of the
single stages are protected by safety valves -10, -11, -12. The
compressed air is pre-cleaned in intermediate separator -8
and purified in filter system P21 -13. Intermediate separator
and filter system P21 are drained by means of condensate
drain valves -15. Pressure maintaining valve -16 provides a
constant pressure within the filter assembly. The com
pressed, purified air is passed through filling hose -17 and fill
ing valve -18 to the bottles to be filled. Filling pressure is indi
cated at pressure gauge -19. With the change over device
model it is possible to fill bottles with 200 bar nominal pres
sure, just by opening valve -21 at filling valve -18. Safety valve
-20 is adjusted to a blow off pressure of 225 bar.
Fig. 1 Compressor unit with petrol engine
1 Filling hose
2 Exhaust
3 Air filter
4 Tank
5 Throttle lever
6 Choke lever
7 Fuel cock
8 Starter rope
9 Engine stop switch (ignition)
10 Filling valve with final pressure gauge
11 Safety valve, final pressure
12 Filter system P21
13 B-Timer
14 Condensate drain taps