OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ofite.com
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A good indication that pressure is trapped inside the cell body occurs if
the set screws are unusually difficult to loosen (especially the 4th, 5th,
and 6th ones) and the cell cap begins to extrude out of the cell body as
the set screws are progressively loosened. To relieve any trapped pres
-
sure, an OFITE Pressure Relief Tool (#170-91) may be inserted through
the inlet cell cap hole which will relieve any trapped pressure inside the
cell. Ensure this function is performed on the inlet side of the cell as the
filter cake may seal off the outlet end of the cell.
34. Invert the cell and loosen, but do not remove, the six cap locking screws,
and separate the cap from the cell with a slight rocking motion. The
OFITE Cell Cap Removal Tool (#170-33) makes it easy to remove tight
difficult to remove cell caps.
35. There are several ways to remove the filter along with the filter cake.
a. Hold the cell and invert it over a sink and let the weight of the fluid
inside the cell push the disk out.
b. A spatula might help in prying out the ceramic disk.
c. With the outlet cell cap removed, re-attach the Inlet CO
2
pressure as-
sembly and apply enough pressure to extrude the ceramic disk.
36. Discard the fluid inside the cell unless it is required for further testing.
Save the filter cake for analysis.
37. Clean and dry the apparatus thoroughly after each use.
38. Inspect all o-rings for deformities and replace as necessary. Replace all
o-rings if the test was conducted above 350°F.
After each test, the HTHP filter press should be left so that a new test may be
performed with no clean-up and a minimum of assembly.
