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25. Release the pressure from the Inlet pressuring unit to the cell by opening
the needle valve (turn counterclockwise).
26. Release the pressure from the back (bottom) pressuring unit to the re
-
ceiver body by pulling outward on the knob which will open the bleeder
valve.
27. Remove the top and bottom retaining pins and remove the two pressure
assemblies.
Take care to avoid touching the hot heating jacket, especially when
re-
moving the back pressure receiver.
28. Open the outlet needle valve and drain any residual filtrate collected in
the receiver into the graduated cylinder.
29. Record the total amount of filtrate collected in the graduate cylinder by
reading from the bottom of the meniscus curve. Multiply this amount in
milliliters by 2.
30. Remove the cell from the heating jacket after once again checking that
the valve stems are tightly closed. An optional Cell Carrying Tool (#170-
40) makes this a simple and safe operation.
DO NOT remove the heated cell using pliers or an open ended wrench at
-
tached to the valve stem. This is very dangerous and could cause serious
damage.
The test cell will still be under approximately 600 psi (4.140 kPa) pres
-
sure. To avoid possible serious injury, position the cell with the outlet end
down and cool it to room temperature before disassembling. The cell
must be below 100°F (38°C). Cool for at least one hour at room tempera
-
ture before loosening the cap locking screws.
31. Place the cooled cell upright with the outlet side down. The optional stand
for the HTHP cell assembly (#171-190-028) makes a great cell holder.
This will help preserve the filter cake. Open (loosen) the Inlet valve stem
to bleed off pressure from the cell body. There should be a noticeable
release of pressure from the cell.
Stand for HTHP Cell Assembly
(#171-190-028)
