Ревидиран
Establishes a series of seat leakage classes for application to specific designs of control valves and defines the test procedures.
ПОВУЧЕН
IEC 60534-4:1982 ED1
ПОВУЧЕН
IEC 60534-4:1982/AMD1:1986 ED1
99.60
Повлачење ступило на снагу
30. 4. 1999.
ПОВУЧЕН
IEC 60534-4:1999 ED2