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Conductive O-profiles

1/1

Series

7900

Extrusion type*

Core material + cover*

Size number*

See extrusion type sizes in the tables

Length (mm)*

Quantity*

Unit*

Download

Datasheet
O-profiles-7900-TDS.pdf

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.

Four kinds of extrusion types are available: 1: hollow, 2: solid, 3: Cell Rubber and 4: rectangular. 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

Can be delivered on reel or in length you desire

Example of the O-profile in use

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.

The figure below shows two different groove designs. On the left there is a typical rectangular groove, while the design on the right can mechanically retain circular cross-section gaskets by side friction.

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

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

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

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

Type 4: Rectangular

Rectangular
Size	Width A (mm)	Height B (mm)
0.25 X 1.0	0.25	1.0
0.25 X 1.5	0.25	1.5
0.25 X 2.0	0.25	2.0
0.25 X 2.5	0.25	2.5
0.25 X 3.0	0.25	3.0
0.5 X 1.0	0.5	1.0
0.5 X 1.5	0.5	1.5
0.5 X 2.0	0.5	2.0
0.5 X 2.5	0.5	2.5
0.5 X 3.0	0.5	3.0
0.8 X 1.0	0.8	1.0
0.8 X 1.5	0.8	1.5
0.8 X 2.0	0.8	2.0
0.8 X 2.5	0.8	2.5
0.8 X 3.0	0.8	3.0
1.0 X 1.0	1.0	1.0
1.0 X 1.5	1.0	1.5
1.0 X 2.0	1.0	2.0
1.0 X 2.5	1.0	2.5
1.0 X 3.0	1.0	3.0
1.5 X 1.0	1.5	1.0
1.5 X 2.0	1.5	2.0
1.5 X 3.0	1.5	3.0
1.6 X 1.0	1.6	1.0
1.6 X 1.6	1.6	1.6
1.8 X 1.0	1.8	1.0
1.8 X 1.6	1.8	1.6
2.0 X 1.0	2.0	1.0
2.0 X 1.6	2.0	1.6
2.0 X 2.0	2.0	2.0
2.0 X 3.0	2.0	3.0
2.4 X 2.0	2.4	2.0
3.0 X 2.0	3.0	2.0
3.2 X 1.6	3.2	1.6
12.7 X 1.6	12.7	1.6
12.7 X 2.0	12.7	2.0
12.7 X 3.0	12.7	3.0
12.7 X 4.8	12.7	4.8
15.9 X 1.6	15.9	1.6
15.9 X 2.0	15.9	2.0
19.0 X 2.0	19.0	2.0
22.35 X 1.6	22.35	1.6
22.35 X 2.0	22.35	2.0
25.4 X 6.4	25.4	6.4

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.

Worldwide leading manufacturer of EMC (electromagnetic compatibility), EMI (electromagnetic interference) and RFI(radio frequency interference) shielding solutions. Our EMC/EMI specialists will work together with you from the design phase through final production

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Contact

Jacobus Lipsweg 124
3316 BP Dordrecht
Netherlands
VAT: NL008884912B01
Tel: +31(0)78 - 204 90 00
Email: [email protected]

Opening times: Monday until Friday - 8:30am-5:00pm CEST