It is a braided packing made of pure PTFE thin yarns fiber, and is treadted
with a special inert lubricant. It is a very plastic packing. Under a
minimum pressure of the stuffing. box, it keeps unchanged in the long
run. The low friction coefficient prevents the surface of the shaft from
forming heat even in the presence of high peripheral speeds. It is suitable
for high-concentrated chemical products, strongly aggressive and
oxidative.