Status : Revised, Superseded, Withdrawn Published : April 2004 Replaced By : BS EN ISO 4126-4:2013
BS EN ISO 4126-4:2004 Safety devices for protection against excessive pressure. Pilot operated safety valves
BS EN ISO 4126-4 specifies general requirements for pilot operated safety valves, other than those covered in Part 1, irrespective of the fluid for which they are designed. In all cases, the operation is carried out by the fluid in the system to be protected.
It is applicable to pilot operated safety valves having a valve 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 it is not concerned with applications for pilot operated safety valves.
Contents of BS EN ISO 4126-4:
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