Design Standards – ISO 17292 , BS 5351 Face to Face Standard – ASME B 16.10 Flange Standard – ASME B 16.5 Screwed/Socket Standard – BSP/NPT – ASME B 1.20.1 / ASME B 16.11 Testing Standard – API 598 / B 16.34
Ⓣ – VIRGIN PTFE :
Inert to most chemicals, low coefficient of friction,
recommended for water, food stuff and corrosive
chemicals. FDA grade.
Ⓟ – CARBON FILLED PTFE – CFT :
Specially for steam and thermal oil, low
Coefficient of friction, inert to most media.
Colour: Pale Black
Ⓙ – 25% GLASS FILLED PTFE :
Similar to 15% glass filled PTFE seats but even better resistance to wear and deformation under load. Colour: Gray-White
Ⓡ – 15% GLASS FILLED PTFE :
Similar to Virgin PTFE seats but better resistance to wear and deformation under load.
Ⓐ – TFM (Modified PTFE) :
TFM is a chemically modified PTFE that offers
enhanced properties while retaining all the proven
advantages of conventional PTFE. FDA grade.