LPLT Filter Press Instruction Manual
207128
Revision G, September 2012
11
4
Pressure Sources
The pressure sources for this filter press are carbon dioxide (cartridges or cylinder),
nitrogen, compressed air, and dead-weight hydraulics (water source).
4.1
Carbon Dioxide Pressure Source
Follow this procedure to pressurize the filter press with a CO
2
cartridge. See Figure
4-1 and 10-5. Carbon dioxide cartridges are not included.
1.
Remove the barrel from the CO
2
pressure assembly and insert a fresh CO
2
cartridge.
2.
Make sure the safety bleeder valve is closed, and the regulator adjusting screw
is backed out to the closed position (maximum outward). Then turn the barrel
loosely until first contact with the puncturing pin is felt.
3.
Turn the holder again, approximately a 1/4 turn. The puncture pin, shown in
Figure 4-1, seals when the cartridge sits securely in the holder.
4.
Turn the adjusting screw into the regulator to apply 100 psi ± 5 psi (690 kPa ±
35 kPa) pressure to the filter cell, as indicated by the pressure gauge. Start
timing for 30 minutes.
An inlet pressure gauge or valve is not used with CO
2
cartridges .
Use care when replacing spent CO
2
cartridges. There could be
some pressure left in the cartridge. Keep the CO
2
cartridges away
from extreme heat.
Fann Instrument Company offers an extended CO
2
cartridge barrel kit (P/N
101758212). This kit consists of an extended barrel and a polyurethane ball. This
extended barrel can accept CO
2
cartridges that are longer than the standard
cartridge, as well as standard cartridges. The ball can be placed into the barrel so
that standard cartridges can fit.
