Exhaust Valve Standards Summary
Exhaust valves are an integral part of the exhaust system of a vehicle, controlling the flow of exhaust gases away from the engine. In order to ensure both efficient and safe performance, it is essential that all exhaust valves comply with appropriate standards.
This guide outlines some of the most commonly used exhaust valve standards and explains their importance for vehicle safety and performance.
European Communities
In Europe, the most widely accepted exhaust valve standards are set by the European Community (EC). The EC sets standards for the design and construction of all exhaust valves, dictating appropriate materials and methods of production.
The EC standard covers both the design and durability of the valve. It specifies the particular tolerances to be met in terms of the thickness and profile of the valve material. Additionally, the standard dictates a particular maximum operating pressure and operating temperature.
American Society for Testing and Materials
The American Society for Testing and Materials (ASTM) has also set standards for exhaust valves. The ASTM exhaust valve standards are similar to the EC standard in terms of material properties, but they also dictate particular testing and installation procedures.
The ASTM standards also specify the particular environmental conditions of the application in which the exhaust valves must meet performance requirements. This means that the valves must be designed to withstand extreme temperature, humidity, vibration and corrosion.
Japan Automotive Standards Organization
The Japan Automotive Standards Organization (JASO) also has a set of exhaust valve standards. The JASO standards are unique in that they dictate specific production materials and quality control procedures, as well as performance requirements.
The JASO standards specify particular noise levels, engine speeds, exhaust pressure levels, and valve seat and stem materials. The standard also requires a certain level of precision in manufacturing, to ensure the accuracy and durability of the valve.
Conclusion
Exhaust valves are necessary for the safe and efficient operation of a vehicle’s exhaust system. In order to ensure the safety and performance of a vehicle, it is essential that all exhaust valves meet the appropriate standards. The EC, ASTM and JASO have all established exhaust valve standards to ensure that vehicles using exhaust valves meet maximum performance criteria.
