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Round wire gaskets0 pages
Round wire gaskets
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.
Materials
Double-sided contact
1.0333, 3.0255, 2.0090,
2.4066, fine-grain silver
Further technical data can
be found in our brochure
under “Materials commonly used”.
Gasket profiles
If the gaskets are
generally elastically
deformed, the sealing surface width
arising should first
be calculated using
the following formula
Profile
Cross-section
Ordering example for a
round wire gasket, Profile
A10 with internal diameter
of 110 m and wire diameter
of 5 mm made of ...1):
A10
bG = 100 •
σ
• r • n • sin α
EG
Round wire gasket, Profile
A10, 110 x 5 / 2.0090
2)
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 bG is equal to the groove
width b. Full plastic deformation requires much higher bolt
loads than the more predominant elastic deformation.
2) Formula taken from
“Optimization of static
gaskets” by H.J.
Tückmantel, published by
Kempchen.
t
1,25
1,9
2,5
3,1
3,8
5,0
6,3
a
0,16
0,24
0,32
0,40
0,48
0,64
0,80
Single-sided contact
Dimensions in mm
s
b
2
2,1
3
3,3
4
4,4
5
5,5
6
6,6
8
8,8
10
11,0
06
t
1,4
2,1
2,8
3,5
4,2
5,6
7,0
a
0,6
0,9
1,2
1,5
1,8
2,4
3,0
Single-sided contact
Dimensions in mm
s
b
2
2,8
3
4,2
4
5,6
5
7,0
6
8,4
8
11,2
10
14,0
a
0,6
0,9
1,2
1,5
1,8
2,4
3,0
Profile
A10
Materials
Aluminium
3.0255
Copper
2.0090
Nickel
2.4066
Fine-grain
silver
Gasket limiting values
Iron 1.0333
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.
1) Specify material when
placing order
Dimensions in mm
s
b
2
2,5
3
3,8
4
5,0
5
6,3
6
7,5
8
10,0
10
12,5
d is the result
from the fit
H8/e8
Round wire gaskets are used in gas and vacuum engineering. Standard materials used include soft-annealed aluminium, copper, silver and nickel.
Recommended max. roughness
from
µm
of the flange surfaces
to
3,2
6,3
3,2
6,3
3,2
6,3
3,2
6,3
3,2
6,3
σv
σϑ
265
600
70
140
135
300
190
510
100
190
210
70
128
206
79
σv
σϑ
265
390
-
135
150
100
480
100
145
185
-
114
118
70
Surface pressure
limits for 20 °C
N/mm2
E modulus at 20 °C
kN/mm2
Surface pressure
limits for 300 °C
E modulus at 300 °C
N/mm2
kN/mm2
Kempchen Dichtungstechnik GmbH · Tel. +49 (0)208 8482 0 · Fax. +49 (0)208 8482 285 · info@kempchen.de · www.kempchen.de
Round wire gaskets
75
"
