Revidiran
Establishes a series of seat leakage classes for application to specific designs of control valves and defines the test procedures.
POVUČEN
IEC 60534-4:1982 ED1
POVUČEN
IEC 60534-4:1982/AMD1:1986 ED1
99.60
Povlačenje stupilo na snagu
30. 4. 1999.
POVUČEN
IEC 60534-4:1999 ED2