Universal Silencer P-8 Pre-Filter and P-12F Final Filter
|
| For absolute Filter Elements Used in FASH Series
Filter Silencers |
| Model |
P-8
Pre-Filter |
P-12F
Final Filter |
| Part
Number |
81-0398
[includes #81-0400 polyester pad (1.)] |
81-0429 |
| Weight |
27 lbs. |
47 lbs. |
| Size |
19-1/2" x
24-1/2" x 8" |
19-1/2" x
24-1/2" x 11-1/2" |
| Efficiency |
Individually tested
& certified 85% efficient by N.B.S. Test |
Individually tested
& certified 99.9710 efficient by D.O.P. test
for particle size 0.3 Micron & larger |
| Pressure
Drop (Clean) |
0.6" H2O
at 1250 CFM |
1.4" H2O
at 1250 CFM |
| Seal |
Sponge
Neoprene Gasket |
Silicon
Fluid Seal |
| Filter
Media |
Waterproof
Glass |
| Separators |
Aluminum |
| Frame |
16 Ga.
Galvanealed Steel |
| Construction |
Pleated
Media Over Corrugated Separators |
| Tools
Required For Removal |
P / N 80-0457 Removal
Tools (2 Required) |
|
|
| (1.) #81-0400 polyester pad is a 2" thick "roughing" filter
which fits on the face of the P-8 Pre-Filter. It may be purchased
separately in cartons of 12 and should be replaced when visually
dirty. |
| Note: P-8 and P-12Fabsolute filter elements are not
cleanable; they must be replaced with new elements per service
instructions. |
| Service Instructions: |
 |
 |
| CAUTION! |
| Filter panels are fragile - handle very carefully
by metal frame. Do not touch media. When inserting filters, push
on metal frame around edge, not on face of media. |
| REMOVAL |
- After removing weatherhoods and retainer bar
in front of filters, insert filter removal tools in space
on either side of Type P-8 Pre-Filter, turning handles 90` so
that hook is positioned behind metal flange on front of filter.
- Pull evenly on both handles, easing pre-filter out of holding
frame. 3. Repeat steps 1 and 2 for removal of final filter.
|
| REPLACEMENT |
- Be certain inside of filter holding frame is perfectly
clean and free of any loose debris.
- With fluid-seal-channel
end forward, position final filter carefully on spacer bars
inside holding frame, pushing it all the way to the back of holding
frame. This places fluid seal in contact with "T" frame
on rear flange of holding frame. 3. Push pre-filter into place,
seating gasket against metal frame of Final Filter. 4. Replace
retainer bars and tighten wing screws, replace weatherhoods.
|
| SERVICING INSTRUCTIONS |
|
P-8 Pre-Filter and P-12F Final Filter are not cleanable: they
must be replaced as prescribed below:
- P +' N 81-0400 2" thick polyester pad
is to be replaced when visually dirty.
- P-8 Pre-Filter
should be replaced when pressure drop across it increases
2" H2O
over initial clean pressure drop.
- P-12F Final Filter
should be replaced when pressure drop across it increases
2" H2O over initial clean pressure drop.
|
| Pressure drop increase is determined across P-8 Pre-Filter and
P-12F Final Filter individually as follows: |
- When unit is initially installed (filters new),
make two pressure drop measurements and record results
for future reference.
- With all filters installed
- With P-8 Pre-Filters removed,
but with P-12F Final Filters installed.
- After unit has
been in prolonged service and it is necessary to
measure pressure drop increases, repeat steps 1 and 2 from
(a.) above. Individual increases can then be
determined by subtracting the clean pressure drops
from (a.) from the corresponding pressure drops measured
after fitters are loaded.
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