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A !@#$ INTERNATIONAL LTD. COMPANY
F02 Quarter-turn Electric Actuators
instruction and operating manual
Section 624/2 chapt. E
7.2.5 THE MOTOR RUNS BUT THE ACTUATOR DOES NOT MOVE THE
VALVE
- Verify that the drive insert correctly fits in the actuator base.
- Verify that the drive insert has enough engagement with the valve stem.
- Verify that the key correctly fits in bore/keyways applications.
- Check that the valve works in manual operation. If not, it is necessary to check the manual
control area as follows:
• Loosen the handwheel security dowel.
• Remove the handwheel.
• Check the integrity of the internal parts.
• Proceeding with the assembly, follow the reverse order of the disassembly.
• Make sure there are no foreign bodies. Pay attention not to damage the O-ring seals.
7.2.6 THE VALVE DOES NOT SEAT CORRECTLY
- If the valve is stopped by torque in closing, increase the actuator output torque limit.
- If the valve is stopped by position in closing, check that the valve reaches its seat position,
then readjust the setting of the position limit.
- The internal trim of the valve may be damaged.
7.2.7 EXCESSIVE TORQUE FOR VALVE OPERATION
- Clean, lubricate and check the valve stem.
- Valve packing too tight: loosen the gland bolt nuts.
- Check that the internal valve trim or the reducer gears are well lubricated and not
damaged.
7.2.8 THE ACTUATOR DOES NOT STOP IN FULLY OPEN OR FULLY
CLOSED POSITION
- Check that the actual open and close positions of the valve respectively correspond to
100% and 0%.
- Make sure that the torque and travel limits are correctly set (see Chapter 6).
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