QT-800 Quarter-Turn Marine Electric Valve Actuator

Product Overview

Easy-Install, User-Configurable Electric Quarter-Turn Valve Actuator for Butterfly & Ball Valves

The QT-800 is part of NAG Marine's Quarter-Turn Series of electric valve actuators, engineered for reliable operation of larger butterfly and ball valves in demanding marine and industrial environments. Designed for high-torque flow control applications, the QT-800 delivers dependable performance, intelligent operation, and long-term reliability for automated valve systems operating in harsh conditions. Its rugged IP68-rated construction and maritime approvals ensure durability in corrosive and high-vibration environments, while integrated feedback and flexible communication capabilities support efficient system monitoring and control.

NAG Marine Electric Valve Actuators are designed to be maintenance-free and feature fully enclosed, permanently lubricated transmissions to provide extended reliable service in harsh maritime and industrial environments.

Request Quote

Features Technical Specs View Datasheet Get Support

Features

High-Torque Quarter-Turn Operation
Compact, Space-Efficient Design
Low Power Consumption
Flexible Communication Protocol Support
IP68-Rated Rugged Construction
Maintenance-Free Operation
Real-Time Valve Status & Feedback
Maritime Type Approved
Intelligent Position & Control Monitoring

Technical Specs

Technical Data
Torque*	184-500ft/lbs (800 Nm max)
Valve Stem Connector**	Valve Spindle Adaptor. SQ27, 45mm depth.
Valve Applications	Butterfly and Ball Valves with partial turn operation
Valve Flange**	F10 & F12 (According to ISO 5211)
Min-Max Closing Time	0-100% / 0-90° / 45-180 sec.
*Configurable using Eltorque Manager - download free at: www.eltorque.no/downloads
Mechanical
Dimensions (H,W,D)	12.9, 7.8, 9.4 in (330, 200, 239 mm)
Weight	46.2 lbs (21 kg)
Housing	IP68 (continuous 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: 200 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 (alarm) 4-20 mA AI/AO signal 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	74: 0-100% / 0-90°
Certifications
CE-Marked Type approved by DNV, GL, CCS, ABS, (Product Design Assessment - PDA), BV, & LR

View Datasheet

Get Support

QT-800 Quarter-Turn Marine Electric Valve Actuator

Product Overview

Easy-Install, User-Configurable Electric Quarter-Turn Valve Actuator for Butterfly & Ball Valves

QT-800 Electric Quarter-Turn Valve Actuator Datasheet

Contact Support