Installa on, Opera on and Maintenance Manual KA30‐en Rev.04/2018
Page 7
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ENGLISH
4.0 MAINTENANCE
All operations described below must be performed and supervised by skilled, trained and competent personnel.
The OMC valves are univocally identified by a serial number fixed on the plate located on the actuator’s yoke. To
order any spare parts or for any other need, always refer to the above-mentioned number.
During the operation the valve is pressurized. Before performing any maintenance operation or
action on the flanges and closing caps, make sure that the line is depressurized (0 bar) and
at ambient temperature.
4.01 VALVE/ACTUATOR SEPARATION
By referring to Pic. 5 (1/2”÷2”) or Pic. 6 (for valves 3”÷4”) perform the following operations:
Set the valve to the 50% stroke
Fully unscrew the screws (1) and remove the terminals (2)
For valves (1/2” ÷ 2”) fully unscrew the ring nut (3).
For valves (3” ÷ 4”) fully unscrew the screws (4)
.
Remove the actuator.
To re-assemble everything the operations must be performed in the reverse order by paying attention to the
alignment of stems and to the value (A)
1
1
2
3
1
2
4
Pic. 5 Valves 1/2” ÷ 2”
Pic. 6 Valves 3” ÷ 4”