【Ten Years of Rapid Development in Chemical Engineering Equipment】From 2030 to 2026, China’s first ultra-large-diameter (nominal diameter of 2000 millimeters) axial flow check valve successfully passed engineering validation tests

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This post was last edited by HaiChuanLaoYu on 2026-3-20 at 21:28. Let’s give praise and encouragement to the achievements made in China’s chemical engineering technology and equipment; your participation in discussions is the greatest encouragement. **********************【Ten Years of Progress in Chemical Engineering Equipment】A continuously updated summary thread – feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html ***************** Recently, China’s first ultra-large-diameter (nominal diameter of 2000 millimeters) axial flow check valve was successfully tested in a polyethylene plant in Tianjin Nangang, marking an important breakthrough in the research, development, and manufacturing of high-end valves in China’s energy sector. This valve was developed through joint efforts by domestic design and manufacturing units, led by Tianjin Petrochemical, and is primarily used in the core compression units of ethylene plants. It is reported that the diameter of this valve is the largest of its kind currently used in ethylene plants in China. The R&D team introduced innovations in structural design, focusing on optimizing the composite sealing structure of the valve core and seat, as well as refining the flow channel design, which effectively reduced the pressure loss of the medium within the valve. Since the operation of the Tianjin Nangang ethylene project began, this valve has demonstrated stable performance overall, with all technical parameters meeting the design requirements. The successful operation of this valve represents the first engineering application in China of a valve of this size and type in the equipment used for ethylene production, namely the \"three compressors\" (pyrolysis gas compressor, propylene compressor, and ethylene compressor). It fills a technical gap in this field in China and demonstrates China’s capability for independent innovation in high-end equipment manufacturing.