Lewco Style SWOG (Spiral
Winding with Outer Guide Ring) gaskets are manufactured to ASME B16.20
dimensions for B16.5 flanges with a preformed metal strip (304ss or
316SS) and soft filler material (Flexible graphite). The outer guide
ring (Carbon Steel) helps center the gasket within the flange.
Lewco Style SWOIG
(Spiral Winding with Inner & Outer Guide) gaskets are manufactured
to ASME B16.20 dimensions for B16.5 flanges with a preformed metal
strip (304SS or 316SS) and soft filler material (Flexible graphite).
The outer guide ring (Carbon Steel) helps center the gasket within the
flange. An inner guide ring (304SS or 316SS) has been pressed into the
ID of the winding. Please contact Lewco to discuss how we can help you.
LEWCO Product Groups 
