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Development of Ultra-High-Pressure, High- and Low-Temperature Seals for Cage Throttle Valves

  • Tools and Techniques
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Abstract

Y-shaped sealing rings of a 140-MPa cage throttle valve were studied at temperatures of − 46 °C, 25 °C, and 180 °C. First, we determined the constitutive model parameters of the ring materials (polytetrafluoroethylene (PTFE), PTFE with 5% carbon fiber, PTFE with 5% carbon fiber and 5% glass fiber, PTFE with 10% carbon fiber (10C-PTFE), and PTFE with 10% carbon fiber and 10% glass fiber) at three temperatures through uniaxial tensile testing. Next, we investigated the influence of interference, lip front angle, and lip back angle on sealing performance and determined the maximum von Mises stresses and maximum contact stresses of the inner and outer lips. Based on those results, 10C-PTFE was established as the best material for Y-shaped sealing rings. A sealing ring with an interference of 0.25 mm, a lip front angle of 75°, and a lip back angle of 16° can simultaneously meet the sealing requirements at all three temperatures and has the best sealing performance. Finally, the obtained optimal sealing ring parameters were used to produce sealing parts, and a testing device was designed to complete the PR1 (Performance Requirements 1) testing. The testing results show that the Y-shaped sealing ring developed here can achieve 140-MPa sealing capability at − 46 °C, 25 °C, and 180 °C with qualified sealing performance.

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Authors and Affiliations

  1. CNPC Tarim Oilfield Company Kara Oil and Gas Development Department, Korla, Xinjiang, China

    Jiang Run

  2. Southwest Petroleum University, Chengdu, Sichuan, China

    Jie Huang

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  1. Jiang Run
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Correspondence to Jiang Run.

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Run, J., Huang, J. Development of Ultra-High-Pressure, High- and Low-Temperature Seals for Cage Throttle Valves. J Fail. Anal. and Preven. 23, 2351–2361 (2023). https://doi.org/10.1007/s11668-023-01795-5

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  • DOI: https://doi.org/10.1007/s11668-023-01795-5

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