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prEN 144-4

Respiratory protective devices - Gas cylinder valves - Part 4: Excess flow devices

Draft Public enquiry
Comment end date 2026-04-28
Export comments Read draft and comment

Project stage codes

1. Prioritetinių darbo temų pažymėjimas ir ekspertų skyrimas
2. Projektas
3. Viešoji apklausa
From 2026-02-27 till 2026-04-28
4. Closure of enquiry
5. Submission to Formal Vote

Organisation

CEN Europos standartizacijos komitetas

ICS

13.340.30 - Respiratory protective devices

Technical Committee

TK 35 Safety of machinery

ForeignTC'S

CEN/TC 79

Number of comments

0

Comment start date

2026-02-27

Scope

This document specifies the technical requirements and the necessary tests of Excess Flow Device (EFD) for use with respiratory protective devices (RPD), up to 300 bar operating pressure. Devices that only close the flow in the event of a valve break-off do not fall within the scope of this document. NOTE Throughout the breathing apparatus market exists a variety of cylinder valves that can have different ways of connecting to an EFD. The interchangeability of the EFD is only possible in the case of verified combinations of cylinder valve and EFD. The use of unverified combinations is not considered safe.