Valve Seat Inserts

Valve Seat Inserts 

We keep in stock over 30,000 valve seat inserts which are available for next day delivery. Our valve seat insert range covers from 20mm to 70mm in diameter.

We supply cast and sintered material valve seat inserts, both in two different specifications for unleaded and heavy duty/LPG applications.

Valve seat bar is also available for companies who wish to manufacture their own valve seat inserts. The valve seat bar is only suitable for unleaded fuel.

Dura-Bond - Powder Metal Technology

Modern engines put much higher levels of thermal and mechanical stress on valve seat inserts. To handle the more severe conditions within this new generation of engines, the OEM is equipping them with high tech sintered valve seats. The normal cast chrome and other alloy iron seats will not adequately withstand the demands of this new engine environment.

Dura-Bond’s patented materials and processing of these powder metal valve seats offer excellent machinability, along with low wear and high heat resistance. These inserts have finely dispersed tungsten carbide residing in a matrix of tempered tool steel and special alloy iron particles to provide all the properties an application requires. Special compositions and processing have been developed to perform in the most extreme duty applications. Complete in-house capabilities, from development and tooling to testing, reduces lead time and cost.

The 30000 Series is the most machinable of Dura-Bond’s valve seat materials.It is a sintered valve seat insert which offers a blend of finely dispersed tungsten carbide residing in a matrix of tempered tool steel and special alloy iron particles. The superior machinability is the result of adding proprietary ingredients and solid dry lubricants to this blend, and by using  special processing techniques during manufacture.

The 70000 Series is a sintered, high speed (tungsten carbide) tool steel, valve seat insert. This material has special additives blended into the matrix which impart high temperature lubrication properties to the valve seat. These lubrication properties are "built-in" throughout, and are not affected by extreme heat or machining. These solid lubricants enable this material to be used in "dry" fuel applications such as propane (LPG) and natural gas. They prevent the "micro-welding" of the valve seat material to the valve face, therefore eliminating the primary cause of valve seat erosion. They also improve the machinability: Your tools last longer and you can cut faster.