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Conductive O-profiles

conductive o profiles

Series

See extrusion type sizes in the tables

Several types of O-profiles have been developed for different applications, each with its own advantages. O-profiles were originally designed for high-performance shielding, mainly for military applications. They are used when environmental sealing and EMI screening are required, and where there is little space.

Three kinds of extrusion types are available: 1: hollow, 2: solid, 3: Cell Rubber. These extrusion cores can be covered with metallized fabric foil or they can be made out of conductive rubber. For optimal shielding performance a compression of 5-10 % is recommended for solid elastomers and 10-50 % for hollow extrusions and sponge rubbers.

Benefits
  • Easy to fit into grooves
  • Deflection up to 50%
  • Low closure force
Options (on request)
  • Cut into accurate lengths or endless O-rings
  • Drop-out prevention fixtures
  • UL94V-0 flame-retardant version
  • High temperature-resistant Silicone core (up to 220 °C)
  • Fluorosilicone (silver aluminium, silver copper, nickel, nickel graphite) for applications with chemicals

conductive rubber O-profiles Can be delivered on reel or in length you desire Can be delivered on reel or in length you desire
conductive rubber O-profile in use Example of the O-profile in use
conductive rubber different shapes It can be delivered in different shapes & sizes

Compression

Solid elastomers cannot be compressed much. They are easily deformed but the volume does not change as would be the case with sponge elastomer (PVC, EPDM, Neoprene) so that allowance for material flow must be considered in the groove design.

conductive rubber how to use

The figure below shows a groove design. This is a mechanically retain circular cross-section gaskets by side friction.

conductive rubber how to use

Material options
Type Code Core Cover
7900-x-11-x 11 Neoprene Amucor foil
7900-x-12-x 12 Neoprene Conductive fabric
7900-x-21-x 21 Silicone Amucor foil
7900-x-22-x 22 Silicone Conductive fabric
7900-x-41-x 41 EPDM Amucor foil
7900-x-42-x 42 EPDM Conductive fabric
7900-x-53-x 53 Silvered particles filled silicone rubber -
7900-x-54-x 54 Nickel filled silicone rubber -
7900-x-55-x 55 Graphite filled silicone -
X needs to be replaced for extrusion type & dimensions

Extrusion types
conductive rubber o-profiles extrusion types
Special materials (on request)

These O-profiles are also available in special materials for special applications for example applications with chemicals. Below is a list of special materials. For availability and delivery please contact us.

  • Silicone Carbon
  • Fluorosilicone Nickel Graphite
  • Silicone Nickel Graphite Flame Retardant
  • Silicone Silver Aluminium
  • Fluorosilicone Silver Aluminium
  • Fluorosilicone Nickel
  • Silver Plated Nickel
  • Silver Glass

Shielding performance and technical details table (dB)

Shielding effectiveness depends on the surface, the shape of gaskets and the materials used.

Conductive Filler Conductive fabric Amucor Graphite Nickel Graphite Silver Aluminum
  Standard
Frequency Shielding Performance STD 285 /MIL-DTL 83528C (dB)
10 MHz N/A N/A 30 115 111
100 MHz 60 65 65 121 120
400 MHz 98 110 60 119 120
1 GHz 94 108 N/A 122 121
2 GHz 91 105 40 122 119
6 GHz 90 102 N/A 115 115
10 GHz 90 100 30 114 112
18 GHz N/A N/A N/A 106 105
OperatingTemp - - +160 +160 +160
Range (°C) - - -50 -55 -55
Colour Grey Silver Black Dark Grey Beige
Shore Hardness (A +/-5) ASTM D2240 - - 60 60 65
Volume Resistivity (ohms/cm) ASTM D991 - - 2.2 0.04 0.008
Specific Gravity (+/- 0.25) - - 2.0 2.0 2.0

Standard extrusions (other sizes on request)

Type 1: Hollow
conductive rubber o-profiles hollow
Hollow
Size Outside A (mm) Inside B (mm)
0.9 X 0.3 0.9 0.3
1.2 X 0.5 1.2 0.5
1.6 X 0.5 1.6 0.5
1.8 X 0.5 1.8 0.5
1.9 X 0.7 1.9 0.7
2.0 X 0.5 2.0 0.5
2.0 X 0.8 2.0 0.8
2.4 X 0.8 2.4 0.8
2.4 X 1.0 2.4 1.0
2.6 X 1.5 2.6 1.5
3.0 X 0.5 3.0 0.5
3.0 X 0.8 3.0 0.8
3.0 X 1.0 3.0 1.0
3.0 X 1.6 3.0 1.6
3.2 X 0.8 3.2 0.8
3.2 X 1.1 3.2 1.1
3.2 X 1.5 3.2 1.5
3.5 X 0.8 3.5 0.8
3.5 X 1.6 3.5 1.6
3.6 X 1.5 3.6 1.5
4.0 X 1.1 4.0 1.1
4.0 X 1.3 4.0 1.3
4.0 X 1.6 4.0 1.6
4.0 X 2.0 4.0 2.0
4.1 X 2.0 4.1 2.0
4.5 X 1.6 4.5 1.6
4.8 X 2.4 4.8 2.4
5.0 X 1.6 5.0 1.6
5.0 X 3.0 5.0 3.0
5.5 X 1.6 5.5 1.6
5.5 X 3.2 5.5 3.2
6.0 X 1.6 6.0 1.6
6.0 X 3.2 6.0 3.2
6.0 X 4.0 6.0 4.0
6.4 X 1.6 6.4 1.6
6.4 X 3.2 6.4 3.2
8.0 X 5.0 8.0 5.0
8.0 X 6.0 8.0 6.0
9.0 X 6.4 9.0 6.4
9.5 X 6.4 9.5 6.4
10.0 X 7.0 10.0 7.0
10.0 X 8.0 10.0 8.0
12.0 X 8.0 12.0 8.0
15.0 X 12.0 15.0 12.0
16.0 X 12.0 16.0 12.0
20.0 X 16.0 20.0 16.0
Type 2: Solid
conductive rubber o-profiles solid
Solid Suggested groove dimensions
Size Diameter (mm) Depth
+/-
0.005
Width 97% max groove fill
1.0 1.0 0.74 1.60
1.2 1.2 0.94 1.70
1.4 1.4 1.04 1.83
1.6 1.6 1.24 2.01
1.8 1.8 1.42 2.18
2.0 2.0 1.63 2.39
2.4 2.4 1.93 2.72
2.6 2.6 2.13 2.97
2.8 2.8 2.34 3.17
3.0 3.0 2.59 3.33
3.2 3.2 2.71 3.53
3.5 3.5 2.90 3.86
4.0 4.0 3.28 4.34
4.5 4.5 3.54 4.63
4.8 4.8 3.91 5.08
5.0 5.0 4.06 5.26
5.4 5.4 4.50 5.94
5.5 5.5 4.55 6.04
6.0 6.0 4.90 6.45
6.4 6.4 5.15 6.75
7.0 7.0 5.74 7.39
7.5 7.5 6.04 7.85
8.0 8.0    
8.5 8.5    
9.0 9.0    
9.5 9.5    
10.0 10.0    
11.0 11.0    
12.0 12.0    
15.0 15.0    
18.0 18.0    
20.0 20.0    
Type 3: Cell rubber
conductive rubber o-profiles cell-rubber
Cell Rubber
Size Diameter (mm)
2.1 2.1
3.0 3.0
3.5 3.5
4.0 4.0
4.5 4.5
5.0 5.0
5.5 5.5
6.0 6.0
6.5 6.5
7.0 7.0
7.5 7.5
8.0 8.0
8.5 8.5
9.0 9.0
9.5 9.5
10.0 10.0
11.0 11.0
12.0 12.0
15.0 15.0
18.0 18.0
20.0 20.0
22.0 22.0
25.0 25.0

7910 Conductive jointed O-rings

We also supply Conductive jointed O-rings. The 7910 series are practically the same as the 7900 series O-Profiles, however, this is a turnkey closed O-ring. They are used where environmental and EMI screening is required but were little space is available.

For more information about check out our Conductive rubber O-rings page.

conductive rubber o-profiles o-ring

 

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