The QT250 and QT800 are the most sold products in the Eltorque portfolio. They
have been used on a various of vessel types on butterfly and ball valves. The
QT800 is based on the QT250, with an additional gearbox to further increase the
output torque. They are equipped with a magnetic position sensor that gives a
correct position feedback, even after a power outage. Both can be manually
operated by the means of a fixed hand wheel located under the cover on top of
the actuator without the need for external tools. Both QT250 and QT800 can be
delivered with the Failsafe option described in 0 on page 64 and the CAN Dual
option described in Appendix A on page 59.
The QT250 actuator is suitable for valves with torque requirements between 100-
250 Nm, while the QT800 is suitable for 320-800 Nm. Both can be delivered with
CANopen, Analog and Digital communication.
Note! For actuators equipped with Failsafe and/or Dual CAN options, these are only
available with the CANopen communication interface.
The actuators are designed to be operational during a temporary submerged
situation, see details for housing in Table 5: System performance parameters for
QT250 and QT800 actuators on page 19.
Figure 2: Actuator mounted on a valve
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