Valve stem seals (VSS) are devices that provide a defined metering rate of oil to the valve stem interface of internal combustion engines to lubricate the valve guide and minimize engine missions.

Valve stem seals must be both leak-proof and permeable at the same time. The reason for this apparent contradiction is through controlled leakage.  The valve stem seal allows a carefully defined amount of engine oil from the cylinder head into the combustion chamber allowing a necessary lubrication of the rotating valve stem in the valve guide.

The benefits of valve stem seals from WSI are:

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  Development to specific customer requirements or use of standards seals

  
  


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  Consistent oil metering and long service life for optimum valve lubrication and minimum engine emissions

  
  


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  Excellent chemical and temperature resistance

  
  


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  Low wear

  
  


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  High quality through state-of-the-art manufacturing processes

  
  


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  Complete technical service to ensure optimal function

  
  

We can do well if our customers have another special requires.

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