High pressures and temperatures are not recommended for PTFE packing
It protects against packing extrusion
High pressures and temperatures are not recommended for PTFE packing because the material tends to be very low-elastic. This characteristic causes the packing material to extrude out of the sealing area, resulting in fluid leakage and increased wear and tear on the operating member. The removal of packing material may require replacement of the operating member. In addition, PTFE packaging is less flexible than metal and may not be as ductile as plastic.
In addition, PTFE has other PTFE packing properties that make it less suitable for use as a wiper ring, including its relatively low coefficient of friction. Because of its cold flow characteristics, it is generally not suited for packing in extreme pressure or temperature conditions. Hence, U.S. Pat. No. 4,886,241 discloses a technique for protecting against packing extrusion using a fiber material with a nitrile elastomeric binder.
It provides great sealing properties
PTFE PACKING is a popular material for use in pressure vessels, valves, and other applications where great sealing properties are required. There are two types of PTFE gland packing: Style 1400L and Style 1400D. Style 1400L is made of braided PTFE, which is soft and pliable. Style 1400D is firm and does not contain lubricant.
PTFE PACKING is often used in rotary pumps. This high-density material is ideal for any chemical medium and is easy to install. It has excellent resistance to gas permeation and has low friction properties. PTFE is also available in flat tape form. For more versatility, UNIVERDIT 6313 is also available in custom sizes. Its low-friction properties make it ideal for applications that require low friction.
Graphite PTFE Packing is another option for sealing applications. It is produced using a specially engineered process. It combines high-purity micronized graphite with a PTFE matrix structure. The result is a high-temperature resistant packing comparable to GFO(r).









