A new strategy to improve the stem sealing[R]

Author: Apuzzo Francesco

Company: Apuzzo Francesco

How to counter the usual valve packing relaxation

The current experimental and operative evidences show that the stem graphite sealing incurs a gradual relaxation that comes in the first weeks of work and after the first thermal cycle. A better knowledge of the product and some simple precaution can mitigate this effect with improved performance.