Compressed air is flowing through the inlet of
the system (J) into a three stage prefiltration
PE, MF, SMF (4, 5, and 6). In these stages,
the air is cleaned from particles and conden-
sate down to a residual content of 0.01 ppm.
The condensate is removed by condensate
drains (16). Via a butterfly valve (8), the air is
led for drying into the adsorption vessel (1),
in which the air is dried down to the required
pressure dewpoint. After that, the air is led
through a non-return valve (12) and into an
activated carbon tower (2), in which oil vapor
and hydrocarbons are retained. Via an after-
filter (7), in which possibly occuring abrasion
from activated carbon is retained, the clean
and oilfree air is led into the compressed air
network to the point of use. While one vessel
is in the drying phase (adsorption), the other
vessel is being dried again (regeneration). A
partial stream of dried air is expanded to at-
mospheric pressure via an orifice plate (17),
led accross the desiccant bed for regenerati-
on and discharged to atmosphere via a but-
terfly valve (11) and a silencer (15). As a sa-
fety feature against contamination (e.g. oil
breakthrough of the compressor), the diffe-
rential pressure across the MF element is
constantly monitored. In case of an immedia-
te increase in differential pressure, the diffe-
rential pressure gauge triggers the control
and a butterfly valve (K5) is closed.
Oilfreepac OFP
Type 1350 to 8750
Complete purification package with triple pre-
filtration with level controlled electronic con-
densate drains each, heatless adsorption dryer,
activated carbon adsorber and afterfilter.
* related to 14.7 psi (abs) and 68 °F at air intake of compressor and 100 psig and 100 °F inlet temperature
OFP
Volume flow
Regeneration
Volume flow
Pressure loss
Prefilter
in
air losses (average)
out (min.)
initial
(Afterfilter)
cfm*
cfm
cfm
psi
PE, MF, SMF (PE)
1350
800
119,12
645,29
4,92
30/30
1650
1000
145,59
788,82
5,64
30/30
1950
1200
172,35
931,76
4,19
30/50
2250
1400
198,53
1075,29
4,77
30/50
2750
1600
242,65
1314,12
6,07
30/50
3500
2000
308,82
1672,94
6,51
3-20/30
4000
2400
352,94
1911,76
3,62
4-30/30
5000
3000
441,18
2390,00
4,48
4-30/30
6000
3500
529,41
2867,65
5,35
4-30/30
7000
4000
617,65
3345,88
6,36
4-30/30
8750
5000
772,06
4181,76
4,05
8-30/30
inc. · · · ·
Technical alterations reserved (Date 1/99)
Purification package OFP
Please contact
Filter Products at 804-231-4646 to place an order or for more information about this product.
