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Valve proving systems for gas burners and gas-burning appliances in accordance to DIN EN 1643 check the effective closure of an automatic shut-off valve by detective leakage. A valve proving system can consist of a programming unit, a measuring device, valves or other functional assemblies.
This document replaces DIN EN 1643:2001-02 .
This document has been replaced by: DIN EN 1643:2024-02 .