UNE-EN 1643:2014

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Conditions for testing and measuring tolerances
5 Design requirements
6 Functional requirements
7 Protection against environmental influences
8 Protection against internal faults
9 Marking, installation and operating instructions
Annex ZA (informative) Clauses of this European Standard
                       addressing essential requirements
                       or other provisions of EU Directives

Safety, constructional and performance requirements for valve proving systems, hereafter referred to as VPS, for gas burners and gas appliances are defined in this Standard. Applicable to all types of VPS which are used for the automatic detection of leakage in a gas burner section having at least 2 valves designed to EN 161 and which give a signal if the leadage of one of the valves exceeds the detection limit. VPS with declared maximum working pressure up to and including 4 bar, for use in systems using fuel gases of the 1st, 2nd and 3rd families are applicable. Does not apply to VPS for use in explosive atmospheres. Covers type testing only.