The envelope is made in TFM™ 1600 with 3 mm lathed, inner diffusion barrier, corrugated ring insert (1.4571) and 2 x graphite inserts. The gasket features excellent compression and recovery behaviour.
The gasket is recommended by enamel equipment manufacturers from DN 250; but is also available in smaller nominal diameters
1 x corrugated ring (1.4571); 2 x graphite SIGRAFLEX® EMAIL (WS 3825)
PTFE envelope gasket
Plastic, enamel or rubber-lined flanges, steel flanges
DIN 2690 / ANSI / EN 1514
Special-purpose dimensions available on request