ICP N9MSB - Filter Pressure Drop Data; Filter Media Pressure Drop vs. Airflow; Filter Media Pressure Drop vs. Velocity

Table 7 Filter Media Pressure Drop (Clean) Versus Airflow - in wc (Pa)
14 x 25 Filter
OFM L/s
600 (283)
800 (378)
1000 (472)
1200 (566)
Factory-Accy
Washable
(1-in./2.5 cm)
0.04 (12)
0.06 (15)
0.07 (18)
0.08 (20)
Representative After-Market Filter Media*
Fiberglass*
(1-in./2.5 cm) (2-in./5 cm)
0.07 (17) 0.10 (26)
O.10 (25) O.15 (39)
0.13 (34) 0.21 (52)
O.17 (43) 0.27 (68)
Pleated*
(1-in./2.5 cm) (2-in.
0.24 (60) O.16
0.34 (85) 0.23
0.32
/ 5 cm)
(40)
(59)
(81)
16x 25 Filter
CFM L/s
600 (283)
800 (378)
1000 (472)
1200 (566)
1400 (661)
1600 (755)
1800 (850)
Factory-Accy
Washable
(1-in./2.5 cm)
0.04 (1 O)
0.05 (13)
0.06 (16)
0.07 (18)
0.08 (21)
0.09 (23)
O.10 (25)
Representative After-Market Filter Media*
Fiberglass* Pleated*
(2-in.
0.13
0.20
0.27
(1-in. /2.5 cm) (2-in. /5 cm) (1-in. /2.5 cm) /5 cm)
0.06 (15) 0.09 (22) 0.20 (51) (34)
0.08 (21) O.13 (32) 0.29 (72) (49)
0.11 (28) 0.17 (43) (67)
O.14 (36) 0.22 (56)
O.18 (45) 0.28 (70)
0.21 (54)
0.26 (64)
20 x 25 Filter
CFM (L/s)
800 (378)
1000 (472)
1200 (566)
1400 (661)
1600 (755)
1800 (850)
2000 (944)
2200 (1038)
Factory-Accy
Washable
(1-in./2.5 cm) (1-in./2.5 cm) (2-in./5 cm) (1-in./2.5 cm) /5 cm)
0.04 (11) 0.06 (16) 0.09 (24) 0.22 (55) (37)
0.05 (13) 0.08 (21) 0.13 (32) 0.29 (72) (49)
0.06 (15) 0.11 (27) 0.16 (41) (63)
0.07 (17) 0.13 (33) 0.20 (51) (79)
0.08 (19) O.16 (40) 0.24 (61)
0.08 (21) O.18 (47) 0.29 (73)
0.09 (23) 0.21 (54)
0.09 (24) 0.25 (62)
Representative After-Market Filter Media*
Fiberglass* Pleated*
(2-in.
0.15
0.20
0.25
0.31
25 x 25 Filter
CFM L/s
800 (378)
1000 (472)
1200 (566)
1400 (661)
1600 (755)
1800 (850)
2000 (944)
2200 (1038)
Factory-Accy
Washable
(1-in./2.5 cm) (1-in./2.5 cm) (2-in./5 cm) (1-in./2.5 cm) /5 cm)
0.03 (9) 0.05 (12) 0.07 (18) O.17 (43) (28)
0.04 (11) 0.06 (16) 0.09 (24) 0.22 (55) (37)
0.05 (13) 0.08 (20) 0.12 (31) 0.27 (68) (47)
0.06 (15) 0.10 (24) 0.15 (38) (58)
0.06 (16) O.11 (29) O.18 (45) (69)
0.07 (18) O.13 (34) 0.21 (53)
0.08 (19) 0.16 (39) 0.24 (61)
0.08 (21) O.18 (45) 0.28 (70)
Representative After-Market Filter Media*
Fiberglass* Pleated*
(2-in.
0.11
0.15
0.18
0.23
0.28
* Representative estimates from filter manufacturer data sheets.
See manufacturers' specifications for pressure drop versus airflow data for specific filter media.
If the filter size that you are looking for is not contained in Table 7, refer to Table 8 for a comparison of Pressure Drop (initial/clean
resistance to airflow) versus Face Velocity for a variety of filter media types.
The following equations relate Face Velocity (FPM), Filter Area and Airflow (CFM):
Filter Face Velocity = Airflow / Filter Area
Minimum Filter Area = Rated System Airflow / Maximum Filter Face Velocity
Table 8
Face
Filter Media Pressure Drop (Clean) Versus Velocity - in wc (Pa)
Velocity Factory-Accy RepresentativeAfter-Market Filter Media*
FPM (m/s)
200 (I)
300 (1.5)
400 (2)
500 (2.5)
600 (3)
700 (3.6)
Washable
(1-in. / 2.5 cm)
0.04 (10)
0.05 (14)
0.07 (17)
0.08 (21)
0.09 (23)
0.10 (26)
Fiberglass*
(1-in. / 2.5 cm)
0.05 (13)
0.09 (22)
0.13 (32)
0.18 (44)
0.23
0.29
(2-in. / 5 cm)
0.08 (20)
0.13 (34)
0.20 (50)
0.27 (69)
Pleated*
(1-in. / 2.5 cm)
0.18 (47)
0.30 (75)
(2-in. / 5 cm)
0.12 (31)
0.21 (52)
0.31 (78)
* Representative estimates from filter manufacturer data sheets.
See manufacturers' specifications for pressure drop versus airflow data for specific filter media.
26 specificationssubjectto change without notice. 440 01 4101 03