UNIFLUOR® PTFE with glass microspheres filler, FD01, WS 7550, thickness 3 mm, Rev. 02

7550FD01
UNIFLUOR® WS 7550 is a high quality biaxially orientated sealing material on PTFE basis, filled with hollow micro glass balls.
Article Number
7550FD01
Material
7550
Profile
FD01
FD01
Type of gasket: Type IBC - flat gasket
Gasket manufacturer: IDT Industrie- und Dichtungstechnik GmbH
Gasket label: UNIFLUOR® PTFE with glass microspheres filler, FD01, WS 7550, thickness 3 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 2.935 2.964 2.95 2.995
1 2.921 2.95 2.943 2.993
5 2.905 2.922 2.905 2.92
10 2.882 2.858 2.585 2.172
15 2.849 2.348 1.852 1.631
20 2.721 1.837 1.564 1.362
30 1.892 1.414 1.228 1.061
40 1.606 1.193 1.051
50 1.409

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 0.014 0.014 0.007 0.002
5 0.030 0.042 0.045 0.075
10 0.053 0.106 0.365 0.823
15 0.086 0.616 1.098 1.364
20 0.214 1.127 1.386 1.633
30 1.043 1.550 1.722 1.934
40 1.329 1.771 1.899
50 1.526

Maximum allowable gasket stress QSmax

Temperature / °C QSmax / MPa
20 50
100 40
150 40
200 30

Modulus of elasticity EG

Modulus of elasticity EG / MPa
Gasket stress / MPa 20°C 100°C 150°C 200°C
5 1866 733 431 265
10 1667 745 255 189
15 1392 331 284 293
20 1114 413 401 409
30 798 759 631 648
40 1211 1135 921
50 1560

Creep/relaxation factor PQR

Creep/relaxation factor PQR
Gasket stress / MPa 20°C 100°C 150°C 200°C
10 0.5
20 0.86 0.51 0.38 0.33
30 0.85 0.57 0.43 0.36
40 0.88 0.58 0.49
50 0.87

Minimum required gasket stress in assembly Qmin(L)

Minimum required gasket stress Qmin(L) / MPa
Leakage rate / mg/m/s 10 bar 16 bar 40 bar
10⁰ 5 5 6
10⁻¹ 5 7 10
10⁻² 8 10 14
10⁻³ 11 15 18
10⁻⁴ 18 19

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

Minimum required gasket stress at internal pressure 10 bar

Minimum required gasket stress QSmin(L) / MPa
Tightness class 20 MPa 30 MPa 40 MPa 50 MPa
10⁰ 5 5 5 5
10⁻¹ 5 5 5 5
10⁻² 5 5 5 5
10⁻³ 5 5 6 7
10⁻⁴ 7 10 16 20

Minimum required gasket stress at internal pressure 16 bar

Minimum required gasket stress QSmin(L) / MPa
Tightness class 20 MPa 30 MPa 40 MPa 50 MPa
10⁰ 5 5 5 5
10⁻¹ 5 5 5 5
10⁻² 5 5 5 5
10⁻³ 5 6 8 9
10⁻⁴ 10 28 35 37

Minimum required gasket stress at internal pressure 40 bar

Minimum required gasket stress QSmin(L) / MPa
Tightness class 20 MPa 30 MPa 40 MPa 50 MPa
10⁰ 5 5 5 5
10⁻¹ 5 5 5 5
10⁻² 6 7 8 8
10⁻³ 10 14 16 18

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 UNIFLUOR® PTFE with glass microspheres filler, FD01, WS 7550, thickness 3 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