Valve Seat Inserts


Inserts that meet or exceed OEM standards


  S - Series - Valve Seats    V - Series - Valve Seats    T - Series - Valve Seats 

SVT S Series Valve Seat
Valve seat inserts are a crucial component of the valve train in the internal combustion engine, as they are the interface between the valve and the cylinder head. Valve and valve seat inserts together function to seal off the combustion chamber by controlling the intake and exhaust gases.

The selection of material in the valve seat is very important. The seat has to withstand extreme temperatures, stress, corrosive gases and compounds. We offer a range of material grades for various engine applications to handle just such conditions. We offer three different types of material content with proven performance and durability: “S-Series”, “V-Series”, and “T-Series”. All valve seat inserts can be manufactured to your exact specification and material choice. Please call or contact us through the contact form on this website for your estimate.

It is critical that the engine’s top operating temperature, duration, and maintenance intervals be taken into consideration when selecting your specific valve seat insert. When ordering, please provide accurate technical valve and valve seat drawings and metallurgical specifications.

Please make sure your valve specs are accurate, as we cannot accept liability for and inaccuracies or the suitability for the valve seats intended purpose. If you have any doubt, please contact us directly and speak with someone in our engineering staff to do a walk-through of your valve or valve seats requirements.


More information on our Valve Seat Selection:


Selecting the correct valve seat material is critical, and finding just the right one can simultaneously produce optimal machinability, thermal conductivity, and longevity. A duel material seat option is also available which uses a lower cost backing when cost is an issue. A full high-density material is always the best performance option since it offers the absolute best in heat transfer. The inner diameter, as well as the outer diameter seat, are perhaps the two most important insert measurements to insure a tight seal in the compression chamber. This is critical to wear as well as insuring high horsepower and low emission standards.
The material selected for your valve seat affects the overall machinability of the finished insert. Although, the combination of steel alloy, carbon, and tungsten carbide found in the valve material is specifically chosen for its wear characteristics, the effect on machining and precision of the insert is also a fairly significant decision. The combination of long wear resistance and insert machinability is also vital in containing short term and long term costs associated not only with the production of the valve seat insert, but the installation. This is even more critical in high performance engines.
The internal combustion engines experiences its most severe wear in the valve train specifically in part due to high heat. Poor tolerance to extreme heat is a valve seat’s Achilles heel. The improvement in heat tolerance has been a long-standing issue in the automotive industry. We have researched valve seat failure within several OEMs and used this to develop new manufacturing processes as well as metal combinations. The valve seats surfaces are hard faced by our own internal processes and contain nickel and chrome alloys that allow very high operational temperatures.
Summit carries valve train for the following: ALLIS CHALMERS, CATERPILLAR, CHEVROLET, COOPER BESSEMER, CUMMINS, DETROIT DIESEL, FORD, GM, GMC DIESEL, HERCULES, INGERSOLL, INTERNATIONAL, JOHN DEERE, MACK, MERCEDES DIESEL, NISSAN, PERKINS, TOYOTA, WAUKESHA, WORTHINGTON, and on vintage industrial and automotive engines.