QT800 is the next step up on Eltorque`s quarter-turn portfolio. The actuator is designed to operate medium-sized butterfly- and ball valves with an operating torque of 250-800 Nm. The QT800 is available with Digital, Analog, MODbus, and CANbus interfaces. The difference between QT250 and QT800 is that the latter is fitted with an extra gearbox to produce the required torque level.

QT800 now supports dual CAN and failsafe features intended to support IMO/SOLAS requirements for safe return to port (SRtP) and emergency shut down.


Min-max torque250 – 800 Nm
Min-max closing time 0-100% / 0-90 42 – 180 sec
Valve spindle adapter27x27mm
Valve flangeF10 & F12 (According to ISO5211)
Valve applicationsButterfly or ball valves with the part-turn operation.
Examples butterfly valves: DN250-DN400 PN16



Weight21 kg
Dimensions H/W/D330/190/240 mm
EncapsulationIP68 (10m 72hr) – Corrosion protected aluminum enclosure
Operating conditions-25 to +55°C
Not designed for use on open deck of ship, outdoor close to saltwater or exposure to corrosive chemicals
Temperature protectionMotor current is switched off in case of over-temperature. Stator coils are utilized as heating elements in case of low temperatures.


In addition to the standard version, Eltorque offers specialized versions of the QT800 for use either on Open deck or in EX classified zones. These actuators are technically similar to the Standard version but are upgraded with key features to secure durability in tough conditions. An overview is listed below;


Operating conditions

-25 to +70°C
Designed for use on open deck and outdoor. Should not be exposed to corrosive chemicals.

QT800 EX

Operating conditions

-25 to +70°C
Designed for use on open deck and outdoor. Should not be exposed to corrosive chemicals.

CertificationsIECEx – Certificate of conformity
EX protection

1. Temperature call T4-maximum surface temperature 135°C in given ambient temperature

2. Gas group IIC

3. Equipment protection level Gb-zone 1


A new coating standard makes the actuator able to handle extreme conditions better than ever before.
For this application, we use the Norsok M-501 System 6 standard.  The coating makes optimal protection of the installation with a minimum need for maintenance; the coating system is also maintenance and application friendly. This coating also ensures that health, safety, and environmental impacts are evaluated and documented.

We have added a new material selection for the interface box, which increases the tensile strength. The alloy (A356) makes the interface box more resistant to corrosion. This makes it handle extreme weather and conditions better than before.

Datasheet QT800