Axial Check Valves: A DN2000 Unit Completes Engineering Verification in a Chinese Ethylene Plant
A DN2000 axial-flow check valve is reported as the largest of its type in a Chinese ethylene plant, after engineering verification at the Tianjin Nangang complex.
Lead
A DN2000 (nominal diameter 2,000 mm, about 80 inches) axial-flow check valve has completed engineering-practice verification at the Tianjin Nangang ethylene plant, according to China Petrochemical News (中国石化报).
The source states that the valve is the largest of its type in an ethylene plant in China.
Facts
What it is. An axial-flow check valve, nominal diameter 2,000 mm. The source states that it is used on the core compressor train of the ethylene unit.
Who developed it. The valve was developed by Sinopec Tianjin Company (天津石化) leading a group of domestic design and manufacturing units.
The stated design work. The source describes two points: an optimised composite sealing structure at the disc and the seat, and a refined flow-path design intended to reduce pressure loss through the body.
The verification. The source states that the valve has run stably since the Tianjin Nangang ethylene project came on stream, with all technical indicators meeting the design requirements.
The source states that this is the first engineering application in China of the largest-diameter valve of its type on an ethylene plant's three-machine set — the crack-gas compressor, the propylene compressor and the ethylene compressor. (Source: China Petrochemical News, 2026-03-18.)
Where this connects on this site
- Where the non-return function sits against isolation and throttling, and the diameter lines that follow — this duty sits above the size at which the site stops recommending automatically: Valve Selection Guide: From Function to Class to Material
- Why a check valve is treated as a separate function rather than a fourth type in the comparison: Ball vs Gate vs Globe Valves: The Three-Way Comparison
- The family this valve belongs to — subtypes, envelope and where the screening stops: Check Valves
- The selector: industrialvalveselect.com
Sources
| # | Fact | Source |
|---|---|---|
| 1 | DN2000 axial-flow check valve; engineering-practice verification at the Tianjin Nangang ethylene plant; used on the core compressor train; developed by 天津石化 with domestic design and manufacturing units; composite sealing structure at disc and seat; refined flow path; stated largest of its type in a Chinese ethylene plant; first engineering application on an ethylene three-machine set | 中国石化报 — http://spc.sinopec.com/group/000/000/070/70553.shtml |
Note on sourcing. Item 1 originates as an industry-press report of a development and its verification. We report only the verifiable layer — what the valve is, where it was verified, and who led the development. We do not repeat performance claims beyond those stated, and we do not rank or recommend suppliers.
What the source does not state
The report does not state the valve's pressure class, its body and disc materials, its sealing-surface material, the number of units installed, or the acceptance standard applied.
Update note
Append-only. Corrections marked Correction with date.