ISO 21922:2021
ID 14441 | 01.09.2021 / Preview in attachment
Refrigerating systems and heat pumps - Valves - Requirements, testing and marking
Introduction
This document is intended to describe the safety requirements, safety factors, test methods, test pressures used, and marking of valves and other components with similar bodies for use in refrigerating systems.
1 Scope
This document specifies safety requirements, certain functional requirements, and marking of valves and oth [...]