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Page Title:
Table I. Contaminant for maximum particle test |
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|  From table I choose the
strainer element to the
With the remaining test
0.05 gm. of the chosen
and add this slurry to the test fluid in the mixing tank.
The contaminant shall be uniformly distributed by churning
the test fluid with an agitator.
Plug valve A shall be closed and the mixing chamber containing
the test fluid and contaminant shall be pressurized with air.
Valve B shall be opened and air pressure shall force the test
fluid containing the contaminant through the sample filter
assembly. The air pressure regulator shall be adjusted to
obtain the rated flow of the strainer. The filtrate shall
be collected in a clean container of ample size to accommodate
both the test and wash fluid. A solvent consisting of 1 liter
of petroleum ether (boiling point 95 to 130 F) previously
filtered through a 0.5-micron absolute membrane filter shall
then be washed through the contaminant mixing chamber and
test assembly using a wash bottle. The wash fluid shall be
collected in the same container.
All of the filtrate and wash fluid shall be passed through a
Millipore AA or equal (0.8 micron) membrane filter while under
a vacuum (minimum 25 inches Hg.). At the completion of this,
the collecting container is to be thoroughly washed with 1
liter of the specified solvent and this effluent is to be
passed through the membrane filter. After washing all
components and filtering the effluent, the membrane filter
is to be disassembled and the filter disc removed for examination.
The entire disc shall be scanned and the largest bead shall
TABLE 1.
Contaminant for maximum particle test
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