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CRF is basically a filter system with multiple filter housing subassemblies that
are installed around rotating inlet and outlet headers which in turn are fitted
to fixed inlet distributor and outlet collector, forming a rotatable filter
assembly that at the same time allows a uniform product flow to continuously
pass through all of the installed filter housings during the normal filtration
cycle
(1), and the majority of the
installed filter housings during the rotation cycle
(2),
(3).
The product enters the main
inlet and gets distributed by the inlet distributor flow channel, over any
desired number of inlet ports (In this case 6 ports are shown. This can be
changed to any optimal number). The flow then enters the inlet housing, which
may have any desired type of opening, and then the center housings containing
one or more filter candles. The flow passes through the filter element(s) and
the outlet housing, which may have any desired type of opening, then enters the
outlet port. The flow passing through the individual outlet ports is merged in
the outlet collector flow channel. The flow then exits the system through the
main outlet.
The CRF filter is stationary during the
Normal Operating Position
(1). When
required, the filter assembly is rotated so that one housing subassembly is
isolated from the product feed and in turn gets depressurized for servicing and
replacement of the filter element(s)
(2).
After the service completion, the filter assembly is rotated
further to the one and only bleeding and venting position so that the newly
serviced housing subassembly can be filled with product by bleeding through the
unique inlet bleeding port and vented through the outlet vent before further
rotation in order to return it to the filtration service
(4). The rotation cycle would then be
repeated for the remaining housing subassemblies. Provisions to decrease the
installed filtration areas are made by removing one or more housing
subassemblies and replacing them with plugs. Provisions to increase the
installed filtration areas are made by
removing one or more housing
subassemblies and replacing them with larger ones.
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