MNL-0295
August 27, 2009 Page 51
CHAPTER 5: PURIFICATION SYSTEM
5.1 General
The purpose of all Bauer breathing air purification systems is to remove Carbon Monoxide, oil, water,
taste and odor from the compressed air stream before final delivery. For this reason Bauer purification
systems are installed immediately before the compressed air delivery point
5.1.1 General Purification System Procedures
1. Keep an accurate record of operating hours to ensure exact attention to maintenance intervals
2. Change all cartridges before reactivating a compressor unit that has been out of service more than
three months. Leave cartridges in the unit as long as it is out of service.
3. While out of service keep all condensate drain valves closed. Maintain a pressure of 700 to
1,100 psi (50 to 80 bar) within the system to prevent moisture from entering the compressor and
purification system.
5.1.2 Chamber Safety Bore
The chambers in all Bauer purification systems are designed to prevent pressurization if the cartridge is
missing, not seated properly or damaged (See Figure 5-1). Without a cartridge properly in place the
safety bore is not sealed, the air escapes into the atmosphere, no pressure can be built up and thus it is
ensured that unfiltered air is not supplied to the consuming device. If air is escaping from the safety bore
remove and check cartridge. If necessary replace the cartridge or O-rings.
5.1.3 Manual Condensate Drainage
The condensate must be drained from the oil and water separator before changing any cartridge. This is
done by slowly opening the condensate drain valves. They are opened approximately 13 of a turn to the
left and held open until the condensate is completely drained. The condensate drain valves close by
spring pressure but if necessary may be tightened by hand to ensure they are completely air tight.
Figure 5-1 Cartridge Safety Venting
Safety
Vent
Cartridge Installed
Safety
Vent
No Cartridge Installed
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