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

The PTFE envelope is made of TFM™ 1600 with an inner diffusion barrier (3 mm wide) and an aramid fibre insert (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.
Article Number

Operational Data

Temperature (min) -50 °C
Temperature (max) 150 °C
Pressure (max) 40 bar
Short -term 200 °C

Dichtungskennwerte EN 13555

Dichtungskennwerte (Amtec)

Dichtungskennwerte DIN 2505 V

K0×Kd [N/mm] 12 × bd
k1 [mm] 1,1 × bd

Dichtungskennwerte nach DIN 28090

бVO [N/mm²] 90
бVU 0,1 [N/mm²] 12
m 1.1
бBO 150 °C [N/mm²] 60

Dichtungskennwerte ASME

m 2
Y [PSI] 1800

Approvals and Test Reports

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


Plain sealing strip (form IBC)
Enamelled flange
GfK flange
Plastic flange
Steel-Ptfe flange


General information: All information given in this Technical Information sheet represents our current level of knowledge and serves as information on our products and their respective scope. It is not meant to ensure any particular properties of any product or the suitability of any product for any specific application, neither does it create any liability on our part.

Last Changed 2023-02-16 10:24:35

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