User Manual QT50 Doc ID 1321 version 2.0 Sept. 2018
Page 45 of 62
Operation
Eltorque actuators can be operated in several ways:
As part of a system directly via IAS
Via an Eltorque VCS which controls the unit
Using the E3C tool, which is described in the EC3 Manual
Emergency operation where you can operate the actuator manually
The control commands and procedures depend on the type of control system
that is used. In this chapter the manual emergency operation is described.
Manual operation
In case of power failure, control system error or another fault preventing normal
operation of the actuator, it is possible to manually operate the actuator without
the need of additional tools.
Caution! Do not subject the hand-wheel to more than the valve MAST or maximum
1.0Nm on the handwheel, as you may damage the actuator or valve. Below is
a table showing approximate output as a factor of input.
Table 11 Input and output torque
Input torque on handwheel Output torque QT50
0.5Nm 25Nm
1.0Nm 50Nm
Note! A manual operation will most likely result in an error message in the system.
1. Remove the hand-wheel cover by grabbing the tabs and pulling it straight
up,
2. Turn the hand-wheel clockwise to close or counter-clockwise to open the
valve. The valve position can be seen on the visual indicator on the side
of the actuator, see Figure 29: Manual operation.
3. When the manual operation is completed, refit the hand-wheel cover by
pressing it down until it stops against the actuator’s top cover.
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