QT-250 Quarter-Turn Marine Electric Valve Actuator
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
Description
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 |
|
| 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) Analog: analog input (set position) analog output (feedback position) digital output (open, closed & alarm) |
| Network Valve-Position Sensor |
Absolute position sensor; provides correct feedback even after power failure. |
| Resolution |
0.39% / 0.35° & 360° range |
|
Configuration / |
USB connection to PC with Eltorque Manager v.3 |
| Configurable Parameters |
|
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 |
