ISO 4126-4:2004
Safety devices for protection against excessive pressure — Part 4: Pilot-operated safety valves
Reference number
ISO 4126-4:2004
Edition 1
ISO 4126-4:2004
Withdrawn (Edition 1, 2004)


ISO 4126-4:2003 specifies general requirements for pilot operated safety valves, other than those covered in ISO 4126-1, 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.

ISO 4126-4:2003 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.

General information

  •  : Withdrawn
     : 2004-02
    : Withdrawal of International Standard [95.99]
  •  : 1
     : 26
  • ISO/TC 185
  • RSS updates

Got a question?

Check out our Help and Support