An automotive valve stem seal is small in size, as compared to other gaskets and seals in an engine, and plays a major role in lubrication. Valve stem seals are designed to allow the seal to leak the lubricant. The seal is designed in such a way that it allows precise and controlled leakage to achieve the specific goals like desired flow. The amount of oil leakage or the size of passage needs to be precise, else it can lead to wear in the guide and stem. The stem and guide might wear out due to insufficient oil; however, excess leakage of oil can cause carbon buildup, which can damage the valve seal, lead to excessive oil consumption, decrease volumetric efficiency, and increase emission.
The severe technological changes is among the major reasons to drive the automotive valve stem seal market. Various technological changes have been made in the “lower cylindrical seal”, piston rings. The properly installed piston rings controls oil flow and compression in the cylinder at any degree. The “umbrella type” of valve stem seal or “O-ring” is used to protect the “upper cylinder seal”. Increase in production of vehicles in countries such as China, India, and Brazil is fuelling the demand for the installation of the automotive valve stem seal. Moreover, rise in disposable income is also projected to boost the automotive valve stem seal market during the forecast period. This system requires a proper climatic conditions which is important for operation but it is not mandatory. These types of seals are based on the theory that the oil goes down the valve stem into the combustion chamber is by gravity flow only. These valves function due to the gravitation flow of oil. This pays no attention to the high vacuum forces acting upon the lower end of the valve stem, or to the spray or mist effect that the continuously pushrods, reciprocating springs, and rocker arms have on the oil in the valve chamber. These types of seals are very efficient “lower cylinder seal” and there is no “upper cylinder seal” as an oil deflector.
The global automotive valve stem seal market can be segmented based on type, application, vehicle type, and region. Based on type, the automotive valve stem seal market can be bifurcated into non-integrated seal and integrated. Based on application, the automotive valve stem seal market can be bifurcated into diesel engine and gasoline engine. Based on vehicle type, the automotive valve stem seal market can have classified into passenger vehicle, electric vehicle, hybrid vehicle, sports car, diesel vehicle, and commercial vehicle. Based on region, the global automotive valve stem seal market can be split into Asia Pacific, Middle East & Africa, Europe, Latin America, and North America. The automotive valve stem seal market in Europe is expected to expand significantly, as countries such as Germany, France, and the U.K. in Western Europe, manufacture a considerably high number of valve stem seals and adopt advanced technology rapidly.
Key players operating in the global automotive valve stem seal market include Federal-Mogul, NOK-Freudenberg, SKF, ElringKlinger AG, Qingdao TKS, Dana Incorporated, ShangYu, and Keeper.
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