Abstract
Compressive and sealing characteristics of PTFE under cyclic loading-unloading at room temperature are studied in order to evaluate the cyclic sealing performance of control valve comprehensively. The unloading characteristics are different from the loading ones, therefore there is hysteresis between the unloading and loading curves. Compressive hysteresis is the main factor that causes sealing hysteresis. The leakage rate of PTFE complies with the power law before it enters the relatively stable region. Lastly, the effect of working pressure on the compressive and sealing characteristics is discussed. The experimental results show that the working pressure has little effect on compressive deformation but has a great influence on leakage rate.
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Funded by the Fund of the State Key Laboratory of Technologies in Space Cryogenic Propellants (No. SKLTSCP1210)
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Zhang, N., Li, Q., Hu, K. et al. Compressive and sealing characteristics of PTFE under cyclic loading-unloading. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 30, 181–184 (2015). https://doi.org/10.1007/s11595-015-1122-9
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DOI: https://doi.org/10.1007/s11595-015-1122-9