Over deze norm
NEN-ISO 23551-4 specifies safety, constructional and performance requirements of valve-proving systems (VPS), intended for use with gas burners and gas-burning appliances. It also describes the test procedures for checking compliance with these requirements and provides information necessary for the purchaser and user. This document is applicable to all types of VPS which are used for the automatic detection of leakage in a gas burner section having at least two valves designed in accordance with ISO 23551-1 and which give a signal if the leakage of one of the valves exceeds the detection limit. This document is applicable to VPS with a maximum working pressure up to and including 500 kPa for use in systems using fuel gases. This document is not applicable to VPSs for use in explosive atmospheres.
|Nederlandse titel||Veiligheids- en regelsystemen voor gas gestookte branders en gasverbruikstoestellen - Speciale eisen - Deel 4: Dichtheidscontrolesystemen voor automatische beveiligingsafsluiters|
|Engelse titel||Safety and control devices for gas burners and gas-burning appliances - Particular requirements - Part 4: Valve-proving systems for automatic shut-off valves|