I. Definition:
it is a kind of packing made of graphite PTFE wire which is made of PTFE fiber with graphite powder and certain thermostable lubricant.

II. Features:
1. low coefficient of friction: the packing has well stability and ling service life
2. The packing has well heat conductivity and tensile strength
3. The packing has excellent self-lubrication: it will not damage the axostyle。

III. Function:
usually, it is applied in the dynamic sealed part with a high linear velocity（16 M/S） and it is used in sealing alkali, solvent, water, steam pump and so on.

P-312 Graphite PTFE packing with silica gel core

1. Definition:
it is made of black PTFE, and there is silica gel in its central part as the elastomer, and it has better compressibility after being machined by weaving-machine.

2. Technique Specification: