QT50 is the most compact quarter-turn actuator.. With an operating torque of 50 Nm, the QT50 is ideal for use with butterfly and ball valves from DN25 to DN80. IP68 protection rating and maritime type approval ensures robustness and durability. The QT50 is designed in line with Eltorque`s Lifelong Intelligent Control philosophy, meaning a maintenance free product with improved functionality and real-time feedback
NAG electric valve actuators are designed to be maintenance free, and feature completely enclosed, permanently lubricated transmissions to ensure extended reliable service in the harshest operating conditions.
Valve Stem Connector
Valve Spindle Adaptor SQ11
Butterfly and Ball Valves with partial turn operation
F04, F05, F07. According to ISO5211
Min-Max Closing Time
0-100% / 0-90° / Min: 5 sec. / Min Recommended: 8 sec. / Max: 15 sec
Up to four (4) M20 cable glands allow for serial connection of power supply and fieldbus wiring
Actuator housing includes threaded mounting holes
Use IP68 glands for all wires to maintain IP rating
Optimized for fieldbus installation (refer to installation manual for specific requirements)
Circular MIL connectors for power/control/configuration
Digital: 2x digital input (Open & Close)
3x digital output (Open, Closed & Alarm)
Analog: analog input (set position) analog output (feedback position) digital output (open, closed & alarm)
CANopen Fieldbus: Max. 127 nodes/network, allows positioning and other extended controls.
*Number of Nodes will be limited by control system
Network Valve-Position Sensor
Absolute position sensor; provides correct feedback even after power failure.
0.39% / 0.35° & 360° range
USB connection to PC with Eltorque Manager v.3
Open & Closed Postions
Speed, torque, valve postion, valve seat region postion.
Inverted I/O or fieldbus parameters depending on control interface.
Emergency & Safety
Standard fixed hand wheel, mechanical valve-position indicator
NAG Marine's mission is to provide best-in-class products and technical representative services to our highly valued customers. We focus on technological solutions to difficult problems in the Fluid Automation and Shipboard Computer markets.
2511 Walmer Ave
Norfolk, Virginia, 23513
United States of America