Solberg 274P Filter Insert Paper With Pre-filter Sleeve

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” / 250280mm H2O over 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 (10200m3/h) or less is suggested through the outlet pipe.
The table below lists the suggested flows based on pipe size:
Pipe Size (inches)
Max Airflow
Pipe Size (inches)
Max Airflow
1/2"
10 CFM
17m3/h
4"
520 CFM
884m3/h
3/4"
20 CFM
34m3/h
5"
800 CFM
1360m3/h
1"
35 CFM
60m3/h
6"
1,100 CFM
1870m3/h
1 ¼"
60 CFM 102m3/h
8"
1,800 CFM
3060m3/h
1 ½"
80 CFM 136m3/h
10"
3,300 CFM
5610m3/h
2"
135 CFM 230m3/h
12"
4,700 CFM
7990m3/h
2 ½"
195 CFM 332m3/h
14"
6,000 CFM 10200m3/h
3"
300 CFM 510m3/h
Table 3 *Note: This information is for general use only. A qualified engineer must properly design each system.
3. Element Specifications Temperature Range: -15° to 220°F / -26° to 105°C
Filter Change-Out Differential: 10” to 15” / 250-380mm H2O Over Initial Delta P
Media Micron Rating Standard Paper 99+% @ 2 micron Standard Polyester 99+% @ 5 micron
“S” Series Wire Mesh Epoxy Coated Wire Mesh “Z” Series Polyester 99+% @ 1 micron
“HE” Series HEPA 99.97% @ 0.3 microns “U” Series Polyester 99+% @ 25 micron
“W” Series Polyester 99+% @ 100 micron “S2” Series Stainless Steel Wire Mesh
“AC” & “ACP” Series N/A “Y” Series Polypropylene 99+% @ 10 micron Table 4
Temperature Range: -15° to 385°F / -26° to 196°C Filter Change-Out Differential: 10” to 15”/ 250-380mm H2O Over Initial Delta P
Media Micron Rating “MX” & “MXD” Series – Nomex Cloth 99+% @ 10 micron Table 5
Page 6 Solberg Manufacturing, Inc., 1151 Ardmore Itasca, IL 60143 USA Ph: 630.773.1363 Fax: 630.773.0727 Email: [email protected] Web: www.solbergmfg.com