Permeability –
A measured liquid or gas flow for a given pressure drop.

316L SS Rolled Sheet.

The flow curves are presented as a design aid for application development using Mott porous metal sheet media. The data is not necessarily representative of Mott’s pressed parts. The air flow graph has data for all media grades determined under ambient conditions. Flow data for water and higher viscosity liquids are given in the other graphs for our standard media grades.

Notes to flow graphs.

  1. Differential pressure varies in direct proportion to sheet thickness. Standard sheet thickness varies with media grade.

  2. Flow curves are presented in a log-log format; be sure to note the correct numerical values for each log cycle.

  3. Flow characteristics given are for porous media only. To determine total pressure drop of a system, combine losses through media, fittings, housing, piping and valves as appropriate.

  4. These flow characteristics were derived using 316L SS porous media.

  5. These flow characteristics are typical and should be used for general reference only.

  6. Tests run at 70°F with water, other curves generated using calculated formulas.

    Liquid: Pressure Drop, psid =
    (KL)(Flux, gpm/ft2)(Visc, cp)(Thck, inc.)

    Gas: Pressure Drop, psid =
    (KG)(Flux, acfm/ft2)(Visc, cp)(Thck, in.)

Liquid Efficiency.

Media
Grade
Particle size, µm
Initial Collection Efficiency
90%
99%
99.9%
0.2
0.5
0.9
1.4
0.5
1
1.7
2.2
1
1.5
2.2
3.3
2
4
5.5
9
5
5
8
13
10
10
16
20
20
20
26
35

Testing performed per ASTM F795
Tested at 1 gpm/ft2
ISO A2 or A3 test dust suspended in water

 

Air Efficiency.

Media
Grade
Particle size , µm
Initial Collection Efficiency
90%
99%
99.9%
0.2
A
B
0.2
0.5
A
0.25
0.3
1
A
0.35
0.7
2
0.3
0.6
2
5
0.8
2
5
10
4.5
8
13
20
8
12
20

Testing performed per IBR E304
Tested a flux of 6 acfm/ft2
A = Initial efficiency greater than 90% for all particle sizes
B = Initial efficiency greater than 99% for all particle sizes

 

Media Grade: 0.2
Thickness: 0.039 inches

Permeability Coefficient
Liquid, KL         140
Gas, KG            1400

 Material Specifications
Bubble Point, in. of Hg: 5-6.9
Tensile, kpsi: 30.0
Yield Strength, kpsi: 26.0
Download File: PDF (15 K)

Media Grade: 0.5
Thickness: 0.047 inches

Permeability Coefficient
Liquid, KL           30
Gas, KG           260
Material Specifications
Bubble Point, in. of Hg: 3-3.9
Tensile, kpsi: 23.5
Yield Strength, kpsi: 21.0
Download File: PDF (15 K)

Media Grade: 1
Thickness: 0.047 inches

Permeability Coefficient
Liquid, KL         9
Gas, KG               90
Material Specifications
Bubble Point, in. of Hg: 2-2.5
Tensile, kpsi: 20.5
Yield Strength, kpsi: 17.0
Download File: PDF (15 K)

Media Grade: 2
Thickness: 0.062 inches

Permeability Coefficient
Liquid, KL           4
Gas, KG           25
Material Specifications
Bubble Point, in. of H2O: 17.0-24
Tensile, kpsi: 17.7
Yield Strength, kpsi: 13.2
Download File: PDF (15 K)

Media Grade: 5
Thickness: 0.062 inches

Permeability Coefficient
Liquid, KL          2
Gas, KG            20
Material Specifications
Bubble Point, in. of H2O: 13-16.9
Tensile, kpsi: 13.3
Yield Strength, kpsi: 9.2
Download File: PDF (15 K)

Media Grade: 10
Thickness: 0.062 inches

Permeability Coefficient
Liquid, KL          0.7
Gas, KG             5
Material Specifications
Bubble Point, in. of H2O: 7.5-10.9
Tensile, kpsi: 10.5
Yield Strength, kpsi: 7.5
Download File: PDF (13.9 K)
   
Air Flow for Grades 0.2-10

 

316L SS ISO Pressed Tube.

Note:
Tests run at 70°F with water, other curves generated using calculated formulas.

Media Grade: 0.5
Outside Diameter: 0.500 inches
Inside Diameter: 0.375 inches

Permeability Coefficient
Liquid, KL         20.2
Gas, KG            154
Material Specifications
Bubble Point, in. of Hg: 3.0-3.9
Download File: PDF (13 K)

Media Grade: 1.0
Outside Diameter: 0.500 inches
Inside Diameter: 0.375 inches

Permeability Coefficient
Liquid, KL         9.2
Gas, KG            60
Material Specifications
Bubble Point, in. of Hg: 2.0-2.5
Download File: PDF (13 K)
   

Media Grade: 2
Outside Diameter: 0.500 inches
Inside Diameter: 0.375 inches

Permeability Coefficient
Liquid, KL         4
Gas, KG            25
Material Specifications
Bubble Point, in. of H2O: 17.0-24.0
Download File: PDF (13 K)

Media Grade: 5
Outside Diameter: 0.500 inches
Inside Diameter: 0.375 inches

Permeability Coefficient
Liquid, KL          2
Gas, KG             20
Material Specifications
Bubble Point, in. of H2O: 13.0-16.9
Download File: PDF (13 K)

Media Grade: 10
Outside Diameter: 0.500 inches
Inside Diameter: 0.375 inches

Permeability Coefficient
Liquid, KL           0.7
Gas, KG              5
Material Specifications
Bubble Point, in. of H2O: 7.5-10.9
Download File: PDF (13 K)

Media Grade: 20.0
Outside Diameter: 0.500 inches
Inside Diameter: 0.375 inches

Permeability Coefficient
Liquid, KL           1.3
Gas, KG              6

 Material Specifications
Bubble Point, in. of H2O: 5.0-7.0
Download File: PDF (13 K)

Media Grade: 40.0
Outside Diameter: 0.500 inches
Inside Diameter: 0.375 inches

Permeability Coefficient
Liquid, KL           0.3
Gas, KG              2
Material Specifications
Bubble Point, in. of H2O: 3.0-4.0
Download File: PDF (13 K)

Media Grade: 100.0
Outside Diameter: 0.500 inches
Inside Diameter: 0.375 inches

Permeability Coefficient
Liquid, KL           0.2
Gas, KG              3
Material Specifications
Bubble Point, in. of H2O: 0.5-1.5
Download File: PDF (13 K)
   
Air Flow for Grades 0.2-10

 

 
   

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