Basically, the PTFE laminated diaphragm mostly combines the advantages of PTFE with the flexibility of an elastomer, with higher mechanical durability and better flex life and memory than standard two piece PTFE diaphragm rubber backed.It also offers less thrust resistance for actuation and it is interchangeable with standard rubber diaphragm thanks to its threaded pin connection. Available up to size DN150 due do design constraints.
2 piece PTFE / elastomer backed diaphragm is advisable when fewer operation cycles expected, in case of abrasive media or when gases could permeate or very chemically aggressive media, thanks to the thicker layer of PTFE.
