Eltorque QT Series, Руководство пользователя

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User Manual QT series generation 2.5, ID 2021, rev 3.2, January 14, 2022 Page 45 of 88
Eltorque actuators can be operated in several ways:
•
As part of a system directly via IAS.
•
Via an Eltorque E-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.
•
Failsafe operation is described in Chapter 8.
The control commands and procedures depend on the type of control
system that is used. In this chapter the manual emergency operation is
described.
In case of power failure, control system error, or another fault preventing
normal operation of the actuator, it is possible to operate the actuator
without the need for additional tools manually.
Table 9: Input and output torque for handwheel
Input torque on the
handwheel [Nm] Output torque on the actuator [Nm]
QT70 QT250 QT400 QT800 QT1000
1 19 75 90 225 311
2 38 150 180 450 622
3 57 225 270 675 933
4 76 300 360 900 1244
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 in the center
of the hand-wheel, and reference is made to the scale. See
Figure 38:
Position scale.
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.
Caution!
Do not subject the hand wheel to more than the valve MAST or maximum 4Nm
on the handwheel, as you may damage the actuator or valve. Below is a table
showing approximate output torque on input torque.