The PTFE lining for Wika diaphragm seals can be used in hazardous applications. Due to its high resistance to chemicals and its good anti-adhesive properties, PTFE (polytetrafluorethylene) is often used in process instrumentation and in pressure measurement instrumentation in particular. As a rule, PTFE is used as lining material for diaphragm seals in this process.
The bonding method Wika developed for diaphragm seals (the so-called plastic bonding) has succeeded in increasing the permanent temperature to +260° and in considerably reducing the surface resistance of the PTFE diaphragm, due to the use of a sophisticated conductive compound. As a result, pressure and differential pressure transmitters with PTFE-lined Wika diaphragm seals can now be used in hazardous areas too.
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