Your Contact for round wire gaskets

Your Contact for round wire gaskets

Suitable for gas and vacuum technology

 

Round wire gaskets

Round wire gaskets are used in gas and vacuum engineering. Standard materials used include soft-annealed aluminium, copper, silver and nickel. Lathed rings and rings bended and welded from calibrated wire can be supplied. Round wire gaskets are usually inserted in grooves. Some possible options are shown here.

If the gaskets are generally elastically deformed, the sealing surface width arising should first be calculated using the following formula:

It should be noted that a small wire and/or sealing diameter will place higher demands on the groove and on the gasket with regard to size, tolerances and surface quality. Lathed rings should be used in this case. With welded models, strong plastic deformation is required. If the material displays full plasticity, such as aluminium, soft copper, silver or gold, the seal width bD is equal to the groove width b. Full plastic deformation requires much higher bolt loads than the more predominant elastic deformation.

The cross-section surfaces for full plastic deformation should be dimensioned in such a way that the round ring can fill the groove cross-section in its deformed state. Generally a gap of a few tenths of a millimetre should be left.

Materials:

 1.0333, 3.0255, 2.0090, 2.4066, fine-grainsilver

 

Gasketlimitingvalues

MaterialsIron 1.0333Aluminium 3.0255Cooper 2.0090Nickel 2.4066Fine-grainsilver
Recommended max. roughnessof the flange surfacesµmvon
bis
3,2
6,3
3,2
6,3
3,2
6,3
3,2
6,3
3,2
6,3
Surface pressurelimits for 20 °CN/mm2σv
σϑ
265
600
70
140
135
300
190
510
100
190
E modulus at 20 °CkN/mm2 2107012820679
Surface pressurelimits for 300 °CN/mmσv
σϑ
265
390
-
-
135
150
100
480
100
145
E modulus at 300 °CkN/mm2 185-11411870