PTFE Coatings, Non Stick Fluoropolymer Coatings
PTFE Coating :
Is a NON-STICK coating done for the different items where 1. Products like Plugs of the Firehydrant valves, Disc of the safety valves.
These vales operation is very rare but when required it has to work.
PTFE Coating reduces chances of sticking the Valve and the valves become more reliable. Also this is usec for Sealing and heating rollers.