Study of the sealing performance of tubing adapters in gas-tight deep-sea water sampler

Haocai Huang 1 , Zhouli Yuan 2 , Wuchen Kang 2 , Zhao Xue 3 , Xihao Chen 2 , Canjun Yang 4 , Yanying Ye 2  and Jianxing Leng 1
  • 1 Ocean College, Zhejiang University, Hangzhou, China / State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, China
  • 2 Ocean College, Zhejiang University, Hangzhou, China
  • 3 Administration and Service Center of Qingdao National Oceanography Laboratory, Qingdao, China
  • 4 State Key Lab of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, China


Tubing adapter is a key connection device in Gas-Tight Deep-Sea Water Sampler (GTWS). The sealing performance of the tubing adapter directly affects the GTWS’s overall gas tightness. Tubing adapters with good sealing performance can ensure the transmission of seawater samples without gas leakage and can be repeatedly used. However, the sealing performance of tubing adapters made of different materials was not studied sufficiently. With the research discussed in this paper, the materials match schemes of the tubing adapters were proposed. With non-linear finite element contact analysis and sea trials in the South China Sea, it is expected that the recommended materials match schemes not only meet the requirements of tubing adapters' sealing performance but also provide the feasible options for the following research on tubing adapters in GTWS

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