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DIN EN ISO 4126-1/A2:2019
Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO 4126-1:2013); German version EN ISO 4126-1:2013/A2:2019
This part of ISO 4126 specifies general requirements for safety valves irrespective of the fluid for which they are designed. It is applicable to safety valves having a flow diameter of 4 mm and above which are for use at set pressures of 0,1 bar gauge and above. No limitation is placed on temperature. This is a product standard and is not applicable to applications of safety valves.
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Deutsches Institut für Normung [din]