NBN EN 1643:2000

This European Standard specifies the safety, constructional and performance requirements for valve proving systems, hereafter referred to as VPS, for gas burners and gas appliances. It applies 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 leakage of one of the valves exceeds the dectection limit. It applies to VPS with declared maximum working pressure up to and including 4 bar, for use in systems using fuel gases of the 1st, 2nd or 3rd families.