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QT-250 Quarter-Turn Marine Electric Valve Actuator

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Featured Specifications:

Preceise quarter-turn control
250 Nm max torque
Designed for butterfly and ball valves
IP68 aluminum housing (stainless steel available)
Easy installation/retrofit
User-configurable torque, closing time
Permanently lubricated
Low power consumption
Manual emergency override

QT250 is suitable for a wide range of small to medium sized butterfly- and ball valves with an operating torque of 50-250 Nm, The quarter turn series offers a high level of precision on the control of valves.

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.

Technical Specifications:

Technical Data

Torque*	36-185ft/lbs (250 Nm max)
Valve Stem Connector**	Valve Spindle Adaptor. SQ17, 38mm depth.
Valve Applications	Butterfly and Ball Valves with partial turn operation
Valve Flange	F04, F05, F07. According to ISO5211.
Min-Max Closing Time	0-100% / 0-90° 13-60 sec

*Configurable using Eltorque Manager - download free at: www.eltorque.no/downloads

Mechanical

Dimensions (H,W,D)	9.01, 6.14, 8.22 in (229, 156, 209 mm)
Weight	26.5 lbs (12 kg)
Housing	IP68 (continous submersion, 32ft/10m - 72hr) Corrosion resistant aluminum housing
Operating Temperature	-13° to 131°F (-25° to 55°C)
Over Temp. Protection	Current controlled
Under Temp. Protection	Stator coils used as heating element
Finish	Black

Electrical

Supply Voltage	110-240 V AC/DC (50/60 Hz)
Power Consumption	Max: 240 VA

Cables & Cable Glands

Up to five (5) 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

Control

Interface Options	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) Modbus Fieldbus: Max 31 nodes per/network CANopen Fieldbus: Max. 127 nodes/network, allows positioning and other extended controls.
Network Valve-Position Sensor	Absolute position sensor; provides correct feedback even after power failure.
Resolution	0.39% / 0.35° & 360° range
Configuration / Set-Up	USB connection to PC with Eltorque Manager v.3
Configurable Parameters	Open & Closed Postions Speed, torque, valve postion, valve seat region postion. Inverted I/O or fieldbus parameters depending on control interface.

Emergency & Safety

Manual Operation	Standard fixed hand wheel, mechanical valve-position indicator
Apprx. Number of Turns Closed - Open	21: 0-100% / 0-90°

Certifications

CE-Marked

Type approved by DNV, GL, CCS, ABS, (Product Design Assessment - PDA), BV, & LR

Attachment	Size
NAG QT-250 (2022 Update) .pdf	258.38 KB

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QT-250 Quarter-Turn Marine Electric Valve Actuator

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