Safety devices for protection against excessive pressure - Part 4: Pilot operated safety valves
|Publication Date:||15 July 2013|
|ICS Code (Protection against excessive pressure):||13.240|
This part of ISO 4126 specifies general requirements for pilot operated safety valves, 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 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 it is not applicable to applications of pilot operated safety valves