extend the service life of the fluid and also reduce system
maintenance. These benefits increase as system operating
Block valves should be positive shutoff
(ball valves or equal) to allow for filter cleaning
without shutting system down.
A 10 micron filter is recommended.
Filter elements can be either sintered metal strainer
or high temperature bag filter (Nomex or equal).
Filter housing, piping and valves should
be insulated according to guidelines for Thermal Fluids.
Side Stream configuration is recommended
for systems with centrifugal pumps.
Optimal flowrate through the filter
is 10% of full system flow. Minimum recommended flowrate
In line filters should be used only
with positive displacement pumps (gear). Never install
an inline filter on a system that uses centrifugal
A second filter in parallel (duplex)
can be installed in place of the manual bypass for
critical applications such as high
temperature electric systems.
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