ISO/DIS 5209 General purpose industrial valves - Marking - Draft for Public Comment
What is it?: This document specifies the requirements for the mandatory and optional markings of general purpose industrial valves. It defines the method of applying the
markings, on the body, on a flange, on an identification plate or any other location.
When specified as a normative reference in a valve product or performance standard,
this document is considered in conjunction with the specified requirements of that valve
product or performance standard.
The marking requirements for plastic valves are not within the scope of this document.
Why is it important?: The main changes are the following:
— inclusion of Clause 2 for normative references and Clause 3 for terms and definitions;
— updating of Clause 4 giving the requirements for mandatory, supplementary and other
— in Table 1 listing valve markings, addition of item 20 “Allowable differential pressure”,
21 “Closing direction” and columns 3 to 5;
— inclusion of a new Clause 5 giving details of marking.
It has been aligned as closely as possible with EN 19.
Supersedes: Will potentially update the 1977 standard
Published in Valve User Magazine Issue 48
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