Valve Terminology Goes to ISO: A China-Led International Standard Passes Its New-Project Ballot
ISO/NP 26798, a terminology standard for industrial valve types and their components led by a Hefei research institute, has passed the new-project ballot of ISO's valve technical committee — four years after the work began.
Lead
ISO/NP 26798, Industrial valves — Terminology and definitions for valve types and their components, has passed the new-project ballot of ISO/TC 153, the technical committee for valves, with Hefei General Machinery Research Institute Co., Ltd. leading the work, the institute announced.
Facts
The project. The standard aims to unify the terminology and definitions of industrial valve types and their components worldwide, applying to industrial valves generally — with rupture discs and safety valves excluded from its scope. The work began in 2022 and passed the committee's ballot of full member countries after four years. (Source: Hefei General Machinery Research Institute, 2026-09.)
The context the institute cites. Valve types and component names have long lacked a unified international standard; the institute notes the same product is often named differently across domestic drawings, foreign technical agreements and third-party inspection reports. (Source: the same; China Machinery Industry Yearbook's report.)
The institute's standards record. The institute hosts the secretariat of China's national valve standardisation committee (SAC/TC 188) and is China's counterpart body to ISO/TC 153. It previously led ISO 22153 on electric actuators for industrial valves — described as China's first led international standard in the field — and holds the revision lead for ISO 6002 on bolted-bonnet steel gate valves. At the ISO/TC 153 annual meeting in Shanghai in December 2025, a Chinese delegation advanced the project with delegates from ten countries. (Source: China Machinery Industry Yearbook, citing the association.)
Where this connects on this site
- Why the naming layer matters before any selection begins — function first: Valve Selection Guide: From Function to Class to Material
- What a test-rate designation does and does not promise — the discipline a shared terminology serves: ISO 5208 Rate A: What a Valve Seat-Leakage Class Does and Does Not Promise
- The selector: industrialvalveselect.com
Sources
| # | Basis |
|---|---|
| 1 | The ISO/NP 26798 new-project ballot passed in ISO/TC 153; the standard's scope (terminology and definitions of industrial valve types and components; rupture discs and safety valves excluded); work started 2022; the institute's role and the naming-inconsistency rationale — 合肥通用机械研究院官网, 2026-09-11 — http://www.hgmri.com/xwzx_14403/xwdt/xwdt2026/202609/t20260911_654034.html |
| 2 | The institute's SAC/TC 188 secretariat and ISO/TC 153 counterpart roles; the ISO 22153 and ISO 6002 records; the December 2025 Shanghai annual meeting (ten countries, 27 delegates) — 中国机械工业年鉴（来源：中国通用机械工业协会） — http://www.cmiy.com/news/1267718 |
Note on sourcing. This item reports a research institute's announcement of a standards milestone. We record the verifiable layer — the ballot, the scope and the record cited. We do not rank or recommend any organisation.
What the source does not state
The reports do not state the draft's content, the committee draft's schedule, or which member countries voted how.
Update note
This item is a dated record of a publicly reported standards milestone. We append corrections rather than rewrite history; corrections are marked Correction with the date.