Expanded graphite is one of the best materials for manufacturing dynamic sealings. Its heat resistance ranges from - 200 °C to + 2000 °C.
PTFE (polytetrafluoroethylene), also known as Teflon, is a perfect sealant. Its good heat resistance up to 280°C,outstanding chemical resistance and low friction coefficient permit application of PTFE yarn both in stuffing boxes of pumps and fittings. Addition of incorporated graphite improves thermal conductivity and reduces tendency of PTFE to squeeze in gaps between the shaft or the spindle and stuffing box enclosure.
Bearing in mind specific properties of PTFE as a material with exceptional chemical resistance and low friction coefficient, but soft at the same time, and mechanical strength of aramide fibres, we produced the combination of both advantages using special weaves.