The QT250 and QT800 actuators are in principle maintenance-free. All bearings
and gears are lifetime lubricated and components are designed to last
throughout the actuator’s lifetime. It is however recommended that the actuator
is inspected regularly to reveal any damages caused by for example mechanical
impact or corrosion.
• Inspection
• Lubrication
• Care and cleaning of anodizing
• Maintenance of battery in a Failsafe system, see chapter B.8 Maintenance on
page 74.
• The actuators should be regularly inspected once a year:
- Check that the bolts connecting the actuator and valve together are
fastened according to required torque.
- Check that the top cover gasket and operation shaft are lubricated. If they
seem to be dry, follow the procedure in 6.4.
- Check for corrosion or other physical damage.
- Perform a test run for each actuator from the control unit.
• If the actuator has been submerged to sea water, Eltorque recommends that
the unit is inspected for damage by Eltorque qualified personnel.
See Appendix C Torque and Screw Recommendations on page 81.
The top cover gasket and manual operation shaft seal should be lubricated if
they appear to be dry. Use suitable silicone lubricants for O-rings such as
MOLYKOTE 55 O-RING grease or Super Lube silicone lubricating compound.
For cleaning purposes use organic solvents such as mild soap or detergent,
alcohol, acetone or MEK (methyl ethyl ketone).
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