Why  NAPTK Valve Seals?

 NAPTK Valve stem seals are made from a variety of materials:

lNylon   

lPTFE rubber

lNitrile rubber

lPolyacrylate rubber

lViton rubber

Viton is the best material currently available for use in many of today’s hotter-running engines,particularly the smaller domestic and imported models.It is often combined with a “metal jacket” or covering that totally surrounds the Viton positive seal.Viton offers excellent resistance to both heat(up to 450 F) and abrasion ,and it the material of choice for most Fel-Pro valve stem seals.

 NAPTK can offer a range of standard valve stem seals, which provide the correct oil metering rate for many applications. This is true for diesel and gasoline applications as well as for intake and exhaust valves. There are however, applications where the oil metering rate must be adjusted. The oil metering rate can be tuned to the exact requirements of a specific engine by changing defined design parameters of the sealing lip. A sophisticated adjustment of seal lip design and contact load allows not only for modification of the average oil metering rate of a valve stem seal, but also for targeted tuning to support lubrication in defined engine application or load conditions.

For more information about  NAPTK Valve Seals ，and please download seal catalogues.

NAPTK Vavle Seal.pdf