Sprial Wound Gasket - Outer Ring Type:

High Temperature & Pressure Equipment, Extreme Low Temperature Pipes, General Pipe Flange, R. F Flanges Flat Flange.

Outer ring role:
Installation gaskets, has focused on the correct position will gaskets of function.
Strengthening, protection of block gasket.
Prevent greatly too forcibly locked up for gaskets( to precent damage to the spin twist close).