RA außendichtendRA external sealing actionRA außendichtendRA außendichtend
S.F. Components GmbH
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Rotary seal of PTFE - RA external sealing


    Diameter DH9

ø D H9
Groove root
ø d h9
Groove width
Cord thickness ø D1
number of
8 - 39,9ø D - 4,92,2ø 1,780
40 - 79,9

ø D - 7,5

3,2ø 2,620
80 - 132,9ø D - 11,04,2ø 3,531
133 - 329,9ø D - 15,56,3ø 5,332
330 - 669,9ø D - 21,08,1ø 7,002
670 - 999,9ø D - 28,09,5ø 8,502

Gap dimension "s" / radius "R"

Groove width
Gap "s"
10 MPa
Gap "s"
20 MPa
2,20,150,100,3 - 0,5
3,20,200,200,5 - 0,7
4,20,250,200,8 - 1,0
6,30,300,251,2 - 1,5
8,10,300,251,5 - 2,0
9,50,400,302,0 - 2,8

All rotary seals are supplied as standard with an O-ring of NBR, 70 Shore. O-rings of special materials such as Viton must be separately specified!

Rotary seals / Ordering example:


RA - 80 x 69,0 x 4,2 - K
Rotary seal external for outside diameter of ø 80 / PTFE-Carbon / Standard design

RA - 80 x 64,5 x 6,3 - BR

Rotary seal external for outside diameter of ø 80 / PTFE-Bronze / Special dimension and material

PTFE - Carbon
PTFE - Bronze
PTFE - Glass fibre
PTFE - Special material




In standard design the rotary seals will be supplied in material PTFE-Carbon, special groove dimension (up to 10 MPa are recommended) see in the above-mentioned table.


All information and values stated concerning our product portfolio are based on the knowledge optained through a long experience of manufacturing and application.
These figures are for indicative purposes only and may vary (exceed or deceed) according to the particular circumstances. Unknown factors in the applications and practice can considerably change the conditions and reduce and change statements, which may cause the above information to be invalid.
No liability can be accepted for any mistakes or omissions, error and subject to change without prior notice.


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7 November 2018                          S.F. Components successfully completed the Certification of the

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April 2017        The world's foremost technology event, HANNOVER MESSE 2017, ended again with a very good outcome. For S.F. Components it has been a very successful week



Rotary sealing

Technical information



external sealing action


internal sealing action


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