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ASTM Selected Technical Papers
Fluid Filtration: Gas Volume I
By
R. Raber Robert
R. Raber Robert
1
Farr Company
?
El Segundo, CA Symposium chairman and editor
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ISBN-10:
0-8031-6200-6
ISBN:
978-0-8031-6200-6
No. of Pages:
443
Publisher:
ASTM International
Publication date:
1986

Quantification of the porous nature of a flat filter medium can be accomplished in a variety of ways. However, some of the commonly used methods are either inadequate or irrelevant. For example, incremental porosimetry does not produce pore size distributions that can be related to filter performance. This paper presents a method for determining types of pore constriction frequency distributions that are more directly applicable to filtration and flow-through processes. A recommended procedure for determining air permeability is shown to be inadequate both for predicting the resistance of a fabric to air flow and for comparing different fabrics. An extended air permeability test methodology is described that can be used to give a better quantification of flow-through resistance.

1.
Good
,
R. J.
, “
The Contact Angle of Mercury on the Internal Surfaces of Porous Bodies
,” in
Surface and Colloid Science
(
Matijevic
E.
and
Good
R. J.
, Eds.),
Plenum Press
, Vol.
13
,
1984
, pp. 283-286.
2.
Winslow
,
D. N.
, “
Advances in Experimental Techniques for Mercury Intrusion Porosimetry
,” in
Surface and Colloid Science
(
Matijevic
E.
and
Good
R. J.
, Eds.),
Plenum Press
, Vol.
13
,
1984
, pp. 259-282.
3.
Miller
,
B.
, and
Tyomkin
,
I.
, “
An Extended Range Liquid Extrusion Method for Determining Pore Size Distributions
,”
Textile Research Journal
 0040-5175, Vol.
56
, No.
1
,
01
1986
, pp. 35-40.
4.
ASTM Standard
 D-737-75.
5.
ASTM Standard
 F-778-82.
6.
Rainard
,
L. W.
, “
Air Permeability of Fabrics, II
,”
Textile Research Journal
 0040-5175, Vol.
17
, No.
3
,
03
1947
, pp. 167-170.
7.
Goodings
,
A. C.
Air Flow Through Textile Fabrics
,”
Textile Research Journal
 0040-5175, Vol.
34
, No.
8
,
08
1964
, pp. 713-724.
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