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Aavolyn # 59-29108-009, AVA31 TY220 Pressure Packing Ring

This style of packing ring is used in higher pressure applications where the seal ring is made from a thermoplastic material, including filled PTFE. At these pressure ranges a backup ring is required to support the sealing ring at the bore to prevent extrusion. The packing groove is not wide enough to utilize the Type 210 pair of rings with a backup. Therefore one ring replaces the normal pair and serves as a radial and tangent combined.


Cylinder/ Rod Diameter




Material Description

AVA31 comes from the family of carbon filled PTFE. By critically controlling filler particle size, AAVOLYN engineers are able to obtain a better mixture of ingredients during blending. This improvement reduces the size of voids in the molded material. The molding and heat treating process was also altered to enhance the physical properties of AVA31. Field test results indicate good wear life in such difficult services as bone dry Nitrogen and boil off gas compressors. No special filters appear necessary to control wear particles from entering the gas stream, a problem with other materials.
Recommended Usage: Nitrogen-Bone Dry Non lube Hydrogen, Ethylene, Ethane, Methane, LNG