Solberg Replacement Filter Elements - Manual (Page 3)

Solberg Manufacturing, Inc., 1151 Ardmore Itasca, IL 60143 USA
Page 3
Filtration Efficiency
Requirements
(99+% efficiency)
Environmental Conditions Air to Media Ratio
Industrial Duty (clean,
office/warehouse-like)
30 CFM
/
ft
2
(51m
3
/h)
/
cm
2
Severe Duty (workshop,
factory-like)
15 CFM
/
ft
2
(25.5m
3
/h)
/
cm
2
Industrial Grade 2-micron
Paper
Extreme Duty (Foundry,
Construction-like)
10 CFM
/
ft
2
(17m
3
/h)
/
cm
2
Industrial Duty (clean,
office/warehouse-like)
50 CFM
/
ft
2
(85m
3
/h)
/
cm
2
Severe Duty (workshop,
factory-like)
40 CFM
/
ft
2
(68m
3
/h)
/
cm
2
Industrial Grade 5-micron
Polyester
Extreme Duty (Foundry,
Construction-like)
25 CFM
/
ft
2
(42.5m
3
/h)
/
cm
2
Industrial Grade 1-micron
Polyester Severe Duty (Foundry,
Construction-like)
10 CFM
/
ft
2
(17m
3
/h)
/
cm
2
Industrial Duty (clean
office/warehouse-like)
10 CFM
/
ft
2
(17m
3
/h)
/
cm
2
Severe Duty (workshop,
factory-like)
7 CFM
/
ft
2
(12m
3
/h)
/
cm
2
Industrial Grade 0.3-micron
HEPA Glass @ 99.97%
efficiency
Extreme Duty (Foundry,
Construction-like)
5 CFM
/
ft
2
(8.5m
3
/h)
/
cm
2
Table 2
Rule of Thumb # 4: Pressure drop is also caused by the dirt holding capacity of
the element. As the element fills up with dirt, the pressure drop increases. It is
important to document the pressure drop across a given filter when it is new and
then clean or replace it when the pressure drop increases by 10” to 15” / 250-
380mm H
2
O from the original reading.
Rule of Thumb #5: The inlet connection greatly influences the overall pressure
drop of the filter system. To minimize the restriction contributed by an inlet filter, a
velocity of 6,000 ft/min (10200m
3
/h) or less is suggested through the outlet pipe.
The table below lists the suggested flows based on pipe size:
Ph: 630.773.1363 Fax: 630.773.0727 Email: [email protected] Web: www.solbergmfg.com
Rev: MMEL-6294
SOLBERG