Particle Control Fluidizing Media
Controlled Permeability and
Filtration in One Unique Sintered Laminate
In response to the needs expressed by many of
our customers, MKI has developed and now offers PCM, a unique series
of fluidizing media which offers not only controlled permeability to air
flow, but also a barrier filter layer on the downstream (product) side
of the Dynapore® sheet.
This series of diffusion-bonded multi-layer laminates combines the flow
characteristics of our popular LFM
fluidizing media with the barrier filtration characteristics of our TWM
five-layer filter plate.
The purpose of these materials
is to prevent infiltration and clogging of the porous medium by the particulate
fines of the powder being fluidized
The Next Generation in Fluidizing
media is particularly useful in applications where:
- Plenum pressure is cycled on and off
- Powder remains on the fluidizing media with no plenum pressure
- Equipment vibration is significant
Since standard Dynapore® LFM
media have mean surface pore sizes of 50 microns or greater, the potential
exists for powders finer than 50 microns to migrate into or through the
Dynapore® in the applications listed above. In certain cases, these
migrating fines can plug the fluidizing medium and sharply reduce its
By laminating a series of fine filter meshes on the downstream (product)
side of the medium, an effective barrier is created that prohibits particle
migration into and/or through the Dynapore®. Therefore the PCM
sheet need only be gasketed or well sealed around its periphery to preclude
infiltration of the pressurized plenum by product fines. This ensures
optimal trouble-free operation.
Remember also that the pressurized supply air or other gas feeding the
plenum must also be dry and properly filtered, in order to prevent dust,
moisture or oil from compromising the upstream plenum side of the Dynapore®.
In the event that PCM media need to be cleaned, the surface collection
characteristics ensure easy cleaning by pressure washing or backflushing.
Standard PCM Part Numbers
PCM media are available in the same standard
air permeabilities as our LFM
media: 5, 10 and 25 SCFM/SF @ 2" water column pressure drop. Particle
control barriers of 1, 2, 5, 10, 15, 20 and 40 microns can be combined
with any of the above flow ratings. Other permeabilities and micron ratings
are available on special order.
Our PCM media are specified as follows:
denotes a Dynapore® medium with a rated permeability to air flow of
10 SCFM/SF @ 2" WC (similar to our LFM-10 or P/N 401300), and a product-face
2 micron barrier filter layer.
Standard PCM Sheet Size
PCM media are available
in standard 24" x 48" sheets, and can be welded, punched and
formed just as standard 3-layer Dynapore® LFM
media. Larger butt-welded sizes are also available, as well as complete