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ULTRASEAL

Eurosealing

PTFE Seals

Groove dimensions PTFE seals type 414 und 143

Radial and Axial Dimension

The seals type 414 and 143 respectively are designed with flange for the axial fixation and/or securing of rotation with rotary seals. Other dimensions are possible as well.

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Groove dimensions seals with flange

Profil T D -0.25 C +0.15 E max F +0.1 G +0.25 H -0.1
3/32" 2.25 3.4 5.2 0.1 0.25 3.6 0.65
1/8" 3.1 5.0 6.9 0.1 0.35 4.7 0.75
3/16" 4.75 7.1 10.1 0.15 0.40 7.1 1.00
1/4" 6.1 9.9 13.2 0.2 0.50 9.5 1.25
3/8" 9.5+/-0.05 15.0 20.0 0.3 0.80 15.0 2.50
1/2" 12.5+/-0.1 20.0 26.0 0.4 1.00 18.0 3.00

Dimension B will be specified by the customer

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Quality of finish for rotary seals

The sealing surface should possess a material portion Mr (in former times bearing portion tp) of approx. 50 to 70% measured in a cutting depth c = 0.25 x Rz

Application Media to be sealed
Gas- and
cryogentechnology		 Liquids
Dynamic 0.1 ... 0.8 µm Ra 0.2 ... 0.4 µm Ra
Static 0.3 ... 0.8 µm Ra 0.4 ... 1.6 µm
Surfaces and flanks without sealing function
approx. 0.4 ... 6.3 µm Ra (depending on dimension)

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Hardness of finish for rotary seals

With rotary sealing cases we recommend a hardness of finish of at least 55 HRC.
The depth of hardness should amount at least to 0.4 - 0.4 mm.

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