Seeking advice on using RPTFE as the sealing surface for flat gate valves
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A 10” 150CL flat gate valve, whose seat is supported by a backing, with RPTFE inserted into the grooves of this backing; the sealing is achieved through the combination of RPTFE and the flat surface. After the RPTFE is inserted into the groove of the support ring, it must be taken to the machining workshop for precision turning of the RPTFE sealing surface. What I want to ask is: Isn’t RPTFE an enhanced version of PTFE? It should be rubber too, right? Why grind it again?
RPTFE is hard PTFE. After being embedded in the valve seat. Generally, there is no need for finish turning. But sometimes I’m worried it won’t be embedded properly. That wouldn’t be fair. So it needs to be turned more precisely
PTFE is polytetrafluoroethylene, a type of plastic. RPTFE is reinforced PTFE, with reinforcement such as glass fibers or graphite. It is usually subjected to further machining after being embedded in the valve seat, primarily to ensure precision and other quality aspects. .