LPLT Filter Press Instruction Manual
207128
Revision G, September 2012
13
4.2
Nitrogen Cylinder Pressure Source
Follow this procedure to pressurize the filter press with a nitrogen cylinder. Refer
to the assembly in Figure 10-4 which shows a filter press with a nitrogen regulator.
1.
With the regulator adjusting screw backed out to the closed position (maximum
outward), slowly open the pressure valve on the cylinder. The inlet pressure
gauge shows the cylinder pressure. Be sure the inlet pressure is greater than 100
psi, (690 kPa).
2.
Be sure the hose between the cylinder regulator and the cell is secure and all
fittings are tight, and the safety-bleeder valve is closed.
3.
Turn the regulator 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.
Always turn the regulator adjusting screw to its maximum outward
position before opening the release valve on the pressure source.
If full pressure is released to an open regulator, the regulator is put
under a severe strain. If this causes the regulator to fail, the full
tank pressure is released to the filter press and it may be
damaged. As an added precaution, a safety bleeder valve that
releases at approximately 170 psi is placed between the regulator
and the filter press.
