pi safety
QT.Ex Electric Actuators
QT.Ex actuator families provide certified damper actuation for classified ventilation and process control duties. They suit applications requiring integrated junction boxes, corrosion-resistant housings, optional feedback and safety-position behaviour.
Product Overview
Explosion-protected electric actuators with spring-return and non-spring-return options for hazardous-area damper control. DAS can assist with product selection, availability, technical documentation and project-specific requirements.
Features & Benefits
- ATEX, IECEx, UKEx, KC, INMETRO and EAC certification options referenced in the 2025 overview.
- Spring-return and non-spring-return model families for fail-safe or standard control duties.
- Optional 0-10 V or 4-20 mA control and feedback variants.
- Integrated junction box and high corrosion resistance for demanding environments.
- Model groups include QT.Ex-MF, QT.Ex-MFD, QT.Ex-MY and QT.Ex-MYQ variants.
Applications
- Hazardous-area damper actuation
- Process ventilation systems
- Oil, gas and chemical facilities
- Pharmaceutical and industrial HVAC controls
Technical Specifications
| Certification | II2(1)G Ex db eb ib mb [ia] IIC T4 Gb; II2(1)D Ex tb [ia] IIIC T130C Db; model-dependent |
|---|---|
| Zones | For mounting in zones 1, 2, 21 and 22 |
| Ambient Temperature | -40 C to +70 C subject to model |
| Protection | IP66 |
| Torque Range | Selected PDF families include 5 Nm, 12 Nm, 15 Nm, 18 Nm, 40 Nm and 50 Nm options |
| Power Supply | 24 V and 230 V options subject to selected actuator |