BS ISO 5209: 2019 General purpose industrial valves – Marking. Revised standard published



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.

This document is considered in conjunction with the specified requirements of the valve product standards or valve performance standards.

The marking requirements for plastic valves are not within the scope of this document.

Why is it important?: The main changes compared to the previous edition are as follows:
- the structure has been aligned with the current ISO Directives, Part 2;
- Clause 4 has been updated to give the requirements for mandatory, supplementary and other markings;
- in Table 1, item 20 “Allowable differential pressure”, item 21 “Closing direction” and columns 3 to 5 have been added;
- a new Clause 5 has been created to give details of marking.

ISO 5209 has been aligned with EN 19 such that valves marked in accordance with EN 19 comply with the revised ISO standard.

Published in Valve User Magazine Issue 51


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