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PTFE TFM™ envelope gasket, with inner diffusion barrier and graphite insert

The PTFE envelope is made of TFM™ 1600 with an inner diffusion barrier (3 mm wide) and a graphite insert in Sigraflex Email (3 mm thick). Leading enamel flange manufacturers recommend this seal up to DN 250 nominal width upward. Where widths are greater the use of sealing system IDT Profile ED30 6.5 mm is recommended for its greater resilience.

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Article Number

7173ED10

Material

7173
 

Profile

ED10

TFM™ is a modified PTFE [mPTFE]. This material is still part of our portfolio. Alternatively, we process mPTFE such as INOFLON® M295 or DAIKIN® MG3 MOD-FF/HD.

 

Description

Operating Data

Temperature (min)
-269 °C
Temperature (max)
260 °C
Pressure (max)
40 bar

Gasket characteristics EN 13555

Gasket Characteristics (IDT)

Gasket characteristics DIN 2505 V

K0×Kd [N/mm2]
8 × bd
k1 [mm]
1,1 × bd

Gasket characteristics DIN 28090

6vo [N/mm2]
90
6vu 0,1 [N/mm2]
8
m (DIN 28090)
1.1
6BO 150 °C [N/mm2]
60

Gasket characteristics ASME

m (ASME)
2
Y [PSI]
1200

Approvals & Test Reports

TA Luft 2002 (VDI 24A0/2200)
DIN EN13555 (TA Luft 2021)
Blow-out resistance
BAM oxygen
BAM oxygen (liquid)
Drinking Water (KTW; WRAS)
WRAS
W270
FDA (Food)
EG 1935/2004

Flange Shapes

Self-centering, Raised Face (form IBC)
Glass-lined, Enamelled flange
GRP flange
Plastic flange
PTFE-lined steel flange