The KB112B chevron packing set has been specifically modified to improve the frictional footprint of the intermediate sealing V’s. A simple lubrication reservoir has been added into the side wall of the sealing element to aid lubrication in long stroke or high-frequency applications.
The design of this set provides automatic pre-load which means the engineer doesn’t have to make manual adjustments to the seal gland or crush the seal which is common when using older rubber & fabric packing sets.
The intermediate V-rings can be stacked on top of each other to provide redundant sealing capability which is useful when the primary seal fails. We recommend a maximum of 2 sealing rings, but up to 4 can be used with this profile, but we suggest that the seal be manufactured in one of our high performance internally lubricated Polyurethanes to help prevent stick-slip caused.
The female header ring is normally manufactured from a common engineering plastic or hard grade Polyurethane to provide extrusion resistance and to provide stability in the gland. The force of the system pressure into the primary male pressure ring increases sealing force by ensuring that the V-rings are energised and further activated under pressure.
Common materials are PU and POM, but several different materials can be provided to suit most applications – Please talk to our technical department if you need assistance with your application.