Automat Industries offers PTFE Lined Reducing Flanges & PTFE Teflon Butterfly Valve Seat. Automat Industries is a manufacturer and exporter of Carbon Filled Teflon Guide Bush, PTFE Teflon Butterfly Valve Seat etc. These flanges and valve seat are used to replace Glass Lined Reducing Flanges. These PTFE Lined Reducing Flanges & PTFE Teflon Butterfly Valve Seats ensure durability and reduce problems of mechanical damage. These are available in standard sizes from 40NB to 250NB. These can also be customized in other sizes.