Elastikdichtung mit Diffusionssperre - Edelstahlwellring - SIGRAFLEX® Emaille-Einlage, Profil ED30, WS 7110/1.4571/3825, Dichtungsdicke 6,5 mm, Rev. 02

Type of gasket: Sheet gasket with PTFE envelop
Gasket manufacturer: IDT Industrie- und Dichtungstechnik GmbH
Gasket label: Elastikdichtung mit Diffusionssperre - Edelstahlwellring - SIGRAFLEX® Emaille-Einlage, Profil ED30, WS 7110/1.4571/3825, Dichtungsdicke 6,5 mm, Rev. 02
maximum temperature: 200 °C
maximum pressure: 40 bar

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Gasket thickness under load eG

Gasket thickness eG / mm
Gasket stress / MPa 20°C 100°C 150°C 200°C
0 6.505 6.545 6.5 6.63
1 6.438 6.474 6.467 6.466
20 4.571 4.461 4.394 4.526
30 4.162 4.124 4.044 4.185
40 3.971 3.881 3.757 3.797
50 3.785 3.571 3.435 3.536
60 3.625 3.303 3.091

Gasket deformation under load ΔeG

Gasket deformation ΔeG / mm
Gasket stress / MPa 20°C 100°C 150°C 200°C
0 0.000 0.000 0.000 0.000
1 0.067 0.071 0.033 0.164
20 1.934 2.084 2.106 2.104
30 2.343 2.421 2.456 2.445
40 2.534 2.664 2.743 2.833
50 2.720 2.974 3.065 3.094
60 2.880 3.242 3.409

Maximum allowable gasket stress QSmax

Temperature / °C QSmax / MPa
20 60
100 60
150 60
200 50

Modulus of elasticity EG

Modulus of elasticity EG / MPa
Gasket stress / MPa 20°C 100°C 150°C 200°C
20 638 595 590 576
30 987 926 864 918
40 1296 1197 1181 1060
50 1625 1584 1495 1427
60 2044 1853 1902

Creep/relaxation factor PQR

Creep/relaxation factor PQR
Gasket stress / MPa 20°C 100°C 150°C 200°C
10 0.9 0.86 0.8 0.78
20 0.78 0.72
30 0.94 0.77 0.66
40 0.58
50 0.74 0.65 0.49
60 0.95 0.76 0.6

Minimum required gasket stress in assembly Qmin(L)

Minimum required gasket stress Qmin(L) / MPa
Leakage rate / mg/m/s 40 bar
10⁰ 10
10⁻¹ 10
10⁻² 10
10⁻³ 10
10⁻⁴ 43

Minimum required gasket stress in service QSmin(L) depending on initial gasket stress QA

Minimum required gasket stress at internal pressure 40 bar

Friction coefficient µG

The friction coefficient between gasket and flange surface was determined for different types of gasket materials in an ESA research project.

The gasket Elastikdichtung mit Diffusionssperre - Edelstahlwellring - SIGRAFLEX® Emaille-Einlage, Profil ED30, WS 7110/1.4571/3825, Dichtungsdicke 6,5 mm, Rev. 02 can be assigned to the categorie 2 : "Gaskets based on filled PTFE". Therefore, the following friction coefficients can be considered:

Temperature / °C Friction coefficient
20 °C 0.23