Revised
Establishes a series of seat leakage classes for application to specific designs of control valves and defines the test procedures.
WITHDRAWN
IEC 60534-4:1982 ED1
WITHDRAWN
IEC 60534-4:1982/AMD1:1986 ED1
99.60
Withdrawal effective
Apr 30, 1999
WITHDRAWN
IEC 60534-4:1999 ED2