Manual

Solberg Manufacturing, Inc., 1151 Ardmore Itasca, IL 60143 USA
Ph: 630.773.1363 Fax: [phone] Email: [e-mail] Web: www.solbergmfg.com
Page 5
Rule of Thumb #1: Always begin with the filter cartridge requirements when
sizing a filter. Once the appropriate element has been selected then move on to
the housing requirements.
Rule of Thumb #2: Always ask or specify a filter based on a micron rating with
filtration efficiencies. As an example, stating a requirement for a 1-micron filter
is misleading because no efficiency rating has been specified. A 1-micron filter at
95% efficiency may be less efficient than a 5-micron filter at 99% efficiency. For
proper air system performance in light and industrial duty environments, a filter
with a minimum of 99% filtration efficiency at 5 microns is required.
Rule of Thumb #3: Size your filter correctly by understanding the impact air
velocity through a media has on efficiency and pressure drop. Maintain the
suggested Air-to-Media ratios listed below based on the external environment
listings and Filtration efficiency needs.
Filtration Efficiency
Requirements
(99%+ efficiency)
Environmental
Conditions
Air to Media Ratio
Industrial Grade 2-micron
Paper
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
Extreme Duty (Foundry,
Construction-like)
10 CFM/ft
2
(17m
3
/h)/cm
2
Industrial Grade 5-micron
Polyester
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
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 Grade 0.3-micron
HEPA Glass @ 99.97%
Efficiency
Industrial Duty (Pre-filtered
Applications)
10 CFM/ft
2
(17m
3
/h)/cm
2
Severe Duty (workshop,
factory-like)
7 CFM/ft
2
(12m
3
/h)/cm
2
Extreme Duty (Foundry,
Construction-like)
5 CFM/ft
2
(8.5m
3
/h)/cm
2
Table 2