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DIN EN ISO 4126-1:2013
Safety devices for protection against excessive pressure - Part 1: Safety valves (ISO 4126-1:2013); German version EN ISO 4126-1:2013
This part of this International Standard 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 6 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 concerned with applications for safety valves.
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Deutsches Institut für Normung [din]