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Grooved gasket, PTFE Soft layer, Profile KD01-KD10-KD20-KD30, WS 1.4571/7739, thickness 4,7 mm, Rev. 00

Type of gasket: Kammprofile gasket
Gasket manufacturer: IDT Industrie- und Dichtungstechnik GmbH
Gasket label: Grooved gasket, PTFE Soft layer, Profile KD01-KD10-KD20-KD30, WS 1.4571/7739, thickness 4,7 mm, Rev. 00
maximum temperature: 200 °C
maximum pressure: 80 bar

Inhaltsverzeichnis

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Gasket thickness under load eG

Gasket thickness eG / mm
Gasket stress / MPa 20°C
0 4.58
1 4.41
20 3.94
30 3.92
40 3.9
50 3.89
60 3.89
80 3.88
100 3.87
120 3.87
140 3.86
160 3.86
180 3.85
200 3.84
220 3.83
240 3.82
260 3.81
280 3.8
300 3.78
320 3.77
340 3.75
360 3.73
380 3.72
400 3.7
420 3.67
440 3.64
460 3.62
480 3.59
500 3.56

Gasket deformation under load ΔeG

Gasket deformation ΔeG / mm
Gasket stress / MPa 20°C
0 0.000
1 0.170
20 0.640
30 0.660
40 0.680
50 0.690
60 0.690
80 0.700
100 0.710
120 0.710
140 0.720
160 0.720
180 0.730
200 0.740
220 0.750
240 0.760
260 0.770
280 0.780
300 0.800
320 0.810
340 0.830
360 0.850
380 0.860
400 0.880
420 0.910
440 0.940
460 0.960
480 0.990
500 1.020

Maximum allowable gasket stress QSmax

Temperature / °C QSmax / MPa
20 500
100 500
150 500
200 500

Modulus of elasticity EG

Modulus of elasticity EG / MPa
Gasket stress / MPa 20°C 100°C 150°C 200°C
20 6738
30 10111 4317
40 13300 53107 77265
50 16426 33069 78376
60 19335 58379 64885 46578
80 26942 44489 28031
100 32653 33158 64413 31622
120 37520 53134 36006
140 39235 59258 48571 36367
160 42465 52207 47509 41403
180 44304 52682 52437 40073
200 46821 41424 52701 35013
220 51145 40665 58319 32294
240 53202 33288 59323 37242
260 54353 34042 58121 39285
280 55605 45554 60007 56489
300 57342 55429 61959 40337
320 62042 63539 65330 57630
340 63683 137110 68270 91519
360 67617 84971 69372 73503
380 71834 74977 70020 70958
400 74970 101635 73604 102969
420 77312 80065 80324 121339
440 78635 75541 79733 120489
460 80350 116165 83554
480 81385 115104 87446 113244
500 87489 89140 94244 199541

Creep/relaxation factor PQR

Creep/relaxation factor PQR
Gasket stress / MPa 20°C 100°C 150°C 200°C
30 0.9 0.74 0.73 0.7
50 0.97 0.9 0.71 0.75
100 0.99 0.83 0.75 0.79
500 0.99 0.96 0.95 0.94

Minimum required gasket stress in assembly Qmin(L)

Minimum required gasket stress Qmin(L) / MPa
Leakage rate / mg/m/s 10 bar 40 bar 80 bar
10⁰ 5 6 20
10⁻¹ 6 15 20
10⁻² 16 23 27
10⁻³ 26 31 35
10⁻⁴ 33 37 46
10⁻⁵ 39 46 58
10⁻⁶ 52 59

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 at internal pressure 40 bar

Minimum required gasket stress at internal pressure 80 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 Grooved gasket, PTFE Soft layer, Profile KD01-KD10-KD20-KD30, WS 1.4571/7739, thickness 4,7 mm, Rev. 00 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