The PTFE envelope is made in TFM™ 1600 with 3 mm lathed, inner diffusion barrier, a corrugated ring insert (1.4571) and 2 x aramid fibre inserts.
The gasket is recommended by enamel equipment manufacturers from DN 250; but is also available in smaller nominal diameters
1 x corruagted ring (1.4571); 2 x aramid fibre (WS 3822)
PTFE envelope gasket
-120 °C to +150 °C
Plastic, enamel or rubber-lined flanges, steel flanges
DIN 2690 / ANSI / EN 1514
Special dimensions available on request