User Manual QT50 Doc ID 1321 version 2.0 Sept. 2018
Page 49 of 62
Maintenance
The QT50 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.
Maintenance overview
Inspection
Lubrication
Care and cleaning of anodizing
Inspection
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 operation shaft is lubricated. If it seems to be dry, follow the
procedure in section 6.4.
- Check for corrosion or other physical damage.
If the actuator has been submerged to sea water, remember to have it checked by
Eltorque to keep the warranty.
Tightening of valve/ actuator bolts
See Appendix 1 Torque and Screw Recommendations on page 57.
Lubrication
The 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.
Care and cleaning of anodizing
Caution! Do not use ammonia, alkaline cleaners, lye or strong acid for cleaning
For cleaning purposes use organic solvents such as mild soap or detergent, alcohol,
acetone or MEK (methyl ethyl ketone).
Caution! Do not use high pressure power washer directly on the actuators as the
product is not IP69K rated.
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