Oceanus
Page 54 2nd Edition, Rev. 0 Chg. 14
5.1.6 Cartridge Operating Life
Every Bauer Purification System is designed to process a certain volume of air before the cartridges
require replacement. By using special test equipment that measures the quality of air at the outlet any
quality reduction may be detected. However as most compressor owners do not have this test equipment
the recommended method of determining cartridge operating life is to maintain a written record of the
volume of air processed by the purification system.
Each Bauer compressor block is rated to produce a standard volume of air per minute and by using this
number and the air processing capability of the purification system it is possible to calculate the maxi-
mum operating hours before the cartridges need to be replaced. See Paragraph 5.1.6.1 for the method of
determining this figure.
The ambient air temperature and its ability to cool the compressor will effect the operating life of the car-
tridge. See Paragraph 5.1.6.2 for the method of calculating this adjustment factor.
The optimum place to measure the temperature is at the inlet to the final separator as this best reflects the
temperature of the air as it enters the chambers. Experience has shown that this temperature is approxi-
mately 10° F above the ambient temperature. Therefore for the purpose of calculating cartridge operating
life use the Ambient Air Temperature plus 10° F.
A form titled Air Purification Cartridge Operating Hours is found in Paragraph 5.1.6.3 and in the Appen-
dices. It is used for recording the ambient temperature, operating time and adjustment factor. It is sug-
gested that it be copied, placed in a protective folder and kept with the unit to record the adjusted
operating hours. An example of how this form is used is shown in Figure 5-4.
5.1.6.1 Calculating the Maximum Cartridge Operating Hours
1. From the purification system dataplate (See Figure 5-2) on the purification chamber determine the
Air Processed (cu. ft.)
2. From the paragraph titled Compressor Specifications in the instruction manual for your compressor
unit determine the Charging Rate in SCFM of your compressor.
3. Divide the Air Processed by the Charging Rate to obtain the Maximum Operating Time in minutes
4. Divide the Maximum Operating Time in minutes by 60 to obtain the Maximum Operating Hours.
5. Record the answer on the Air Purification Cartridge Operating Hours form.
5.1.6.2 Calculating the Adjusted Cartridge Operating Hours
1. Using the Air Purification Cartridge Operating Hours form record the Date, Operating Hours and
Ambient Air Temperature plus 10° F.
2. Using either the graph or the chart in Figure 5-3 determine the Correction Factor.
3. Divide the Operating Hours by the Correction Factor and record it under the column labeled Today.
4. Add the hours recorded in Today to the previous Total and record it as the current Total.
5. When the Total reaches the Maximum Operating Hours replace the Cartridges.
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