Electric actuators from pi safety for industry & hazardous areas (ATEX, IECEx, UKEx,... certified)

  • Precise control and maximum safety in hazardous areas (ATEX, IECEx, UKEx,…certified)
  • Low maintenance, durable, and optimized for industrial applications
  • Time-saving and easy installation – mount, connect, and you're done!
  • Fast availability worldwide – short delivery times
QT-Ex-SAS

pi safety offers innovative actuators “Made in Germany”, specially designed for use in hazardous areas and industrial applications.
They are characterized by easy installation, high reliability, and adaptability to various requirements.
Mount, connect – done! pi safety actuators save a lot of time thanks to plug-and-play and now make handling even easier and safer!

Electric actuators for applications in hazardous areas

For use in hazardous areas (Ex zones), pi safety offers highly secure actuator solutions with international approvals
(certified according to ATEX, IECEx, UKEx and many more) – reliable, durable, and easy to operate.

QT.Ex-M, electric actuators, explosion-proof

Product specifications

  • ATEX / IECEx / UKEx / KC / INMETRO / EAC certified
  • Integrated junction box
  • Ambient temperature -40…+70 °C
  • Optional control / feedback 0…10 V; 4…20 mA
  • IP66
  • For mounting in zone 1, 2, 21, 22
  • Stainless steel / polymer compound material for maximum corrosion resistance
  • Optional safety position/spring return

Technical data

Specification II2(1)G Ex db eb ib mb [ia] IIC T4 Gb
II2(1)G Ex tb [ia] IIIC T130°C Db
II2 G Ex h IIC T4 Gb
II2 D Ex h IIIC T130 °C Db
Manufacturer pi safety components
Auxiliary Switches 5° / 80° Switching points
max. 250 V / 0,1 A min. 5 V / 5 mA
Angle of rotation 95° (5° Preload)
Hollow shaft 12 x 12 mm (Double squar)
Power consumption 5 W / 7 VA In holding position
20 W / 30 VA Motor
30 VA / 2 A  Layout
Permissible humidity 0...95% r.F without condensation
Ambient temperature -40...+70°C
Housing material High-tech polymer non-halogen, silicone-free
Protection class IP66
Dimensions Approx. 320 x 120 x 85 mm

5 advantages of the QT.Ex-M from pi safety

Certified safety for Ex zones

  • ATEX / IECEx / UKEx / KC / INMETRO / EAC certified
  • Approved for zones 1, 2, 21, and 22 (gas and dust)
  • Safe control in potentially explosive areas worldwide

Extremely resilient in any environment

  • Temperature range: -40°C to +70°C
  • Ideal for outdoor areas, offshore, chemical or energy plants

High protection class & material resistance

  • Housing in IP66 – dustproof & protected against strong water jets
  • Stainless steel or polymer compound for maximum corrosion resistance (SSPC)

Flexible control & easy integration

  • Control / feedback: 0–10 V or 4–20 mA
  • Compatible with common control systems (e.g., PLC, process control systems)
  • Integrated connection box for quick installation

Optional safety position (spring return)

  • Spring return function available – moves the system to a predefined safety position (fail-safe open, fail-safe close, or fail-to-position without return spring) in the event of a power failure, fire, or control signal
  • Ideal for critical applications where downtime must be avoided

Areas of application for pi safety actuators in potentially explosive areas (QT.Ex-M):

Chemical and petrochemical plants

Control of safety valves & ball valves as well as material lines in Ex zones

Oil and gas industry (onshore/offshore)

Control of conveyor systems, compressors, storage and pipeline systems

Pharmaceutical industry

Safe process automation in gas or dust explosive areas

Paint, varnish, and solvent processing

Protection and control of explosion-hazardous mixing and filling processes

Mining and tunnel technology

Use in climatically extreme and safety-critical environments

Marine and offshore platforms

Saltwater-resistant, explosion-proof solutions for shipbuilding and energy supply

Electric actuators for industrial applications

Electric actuators from pi safety for industrial applications offer reliable performance in demanding environments – ideal for process engineering plants, automation, and OEM projects.

QT.Nc-M, electric actuators

Product specifications

  • Integrated junction box
  • Ambient temperature -40…+70 °C
  • Optional fail safe / spring return
  • Optional control / feedback 0…10 V; 4…20 mA
  • IP66
  • Highest corrosion resistance

Technical data

Manufacturer pi safety components
Auxiliary Switches 5° / 80° Switching points
max. 250 V / 0,1 A min. 5 V / 5 mA
Angle of rotation 95° (5° Preload)
Hollow shaft 12 x 12 mm (Double square)
Power consumption 5 W / 7 VA In holding position
20 W / 30 VA Motor
30 VA / 2 A  Layout
Permissible humidity 0...95% r.F without condensation
Ambient temperature -40...+70°C
Housing material non-halogen, silicone-free
Protection class IP66
Dimensions Approx. 320 x 120 x 85 mm

Advantages of the QT.Nc-M – from pi safety

Reliable actuator technology for industrial processes

  • Developed for continuous operation in demanding industrial environments
  • Ideal for applications in water/wastewater technology, mechanical engineering, building technology, and process automation

Wide temperature range

  • Ready for use at temperatures from -40°C to +70°C
  • Optimal for indoor and outdoor use, even under extreme conditions robust and protected – even in outdoor use
  • Protection class IP66: dustproof and protected against strong water jets
  • Housing made of corrosion-resistant material (SSPC) – can also be used in humid or aggressive environments, e.g., seawater

Easy installation & quick commissioning

  • Integrated connection box for time-saving installation “mount – connect – done!”
  • Compact design – perfect for confined installation conditions or OEM projects

Flexible control & feedback

  • Supports 0–10 V and 4–20 mA signals
  • Compatible with PLCs, control systems, and modern automation platforms
  • Optional: Safety position (spring return / safe open or fail safe close ) for systems with increased safety requirements

Cost-effectiveness & durability

  • Low maintenance and durable thanks to high-quality components
  • Low operating costs over the entire service life

Quality made in Germany

  • Developed and manufactured in Germany – in accordance to the highest industrial standards
  • Many years of experience in safety-related applications

Areas of application for pi safety actuators for industry (QT.Nc-M):

Water and wastewater technology

Control of valves, dampers, and pump systems

Energy supply & power plants

Control of steam lines, cooling systems, or gas control systems

Machine and plant engineering

Integration into automated systems for process control

Building automation & HVAC

Control of air dampers, heating/cooling systems, fire dampers

Food & beverage industry

Clean, low-maintenance actuators for valves in sensitive areas

FAQ about Electric Actuators from pi safety

Can pi safety actuators be integrated into existing automation systems?

Yes, our actuators are compatible with common automation and control systems. They support various control types – from classic 2-point control to analog signals.

Are pi safety actuators suitable for outdoor use?

All models are IP66-rated and, thanks to a proprietary material called SSPC (stainless steel plastic compound), have excellent resistance to salt water and chemicals.

Does pi safety also offer application-specific special solutions or OEM variants?

Absolutely. In addition to our standard range, we also develop customer-specific special solutions or OEM versions – adapted to the design, interface, environment, or function. Just get in touch with us!

Which certifications do PI Safety actuators for hazardous areas comply with?

PI Safety actuators, in particular the QT.Ex-M series, are certified according to:

  • ATEX (Europe)
  • IECEx (international)
  • UKEx (United Kingdom)
  • INMETRO (Brazil)
  • EAC (Eurasian Economic Union)
  • KC (Korea)

These certifications confirm the suitability of the products for use in potentially explosive atmospheres in accordance with the respective regional and international standards.

 

In which zones can the explosion-proof actuators (ATEX) be used?

The explosion-proof actuators from PI Safety are suitable for use in the following zones:

  • Zone 1: Areas in which an explosive atmosphere occurs occasionally
  • Zone 2: Areas in which an explosive atmosphere occurs rarely and only for a short time
  • Zone 21: Areas with occasional occurrence of explosive dust atmospheres
  • Zone 22: Areas with rare and short-term occurrence of explosive dust atmospheres

These classifications ensure the safe use of the devices in the corresponding environments.

What does the two-component design of PI Safety actuators mean?

The two-component design allows the functional part to be separated from the connection box. This facilitates maintenance work, as the functional part can be removed without affecting the electrical connections. It also increases safety, as there are no additional explosion hazards during maintenance.

What temperature ranges do the actuators cover?

The actuators are designed for a wide temperature range from -40°C to +70°C. This allows them to be used in a wide variety of climatic conditions, from cold outdoor areas to warm industrial plants. Special accessories can extend the temperature range.

What are the advantages of the housing material used?

PI Safety uses a special polymer composite material with the following advantages:

  • High corrosion resistance
  • Low weight
  • Easy handling and installation
  • Resistance to aggressive media

This makes the actuators particularly durable and low-maintenance.

What is a spring return actuator and when is it used?

A spring return actuator has a mechanical spring that automatically returns the actuator to a predefined safety position in the event of a power failure or malfunction. This is particularly important in safety-critical applications, e.g., to automatically close or open valves or ventilation and fire dampers, thereby protecting equipment and lives.

How does service and support work at pi safety?

pi safety offers you direct technical support from experienced developers and application engineers – without having to go through external call centers or distributors.
Unlike many competitors, where support is often handled through tiered distribution channels, ticket portals, or central service platforms, pi safety offers you:

  • Personal contacts who are directly available
  • Short response times, even for special cases and OEM inquiries
  • Technical advice from the planning phase onwards, not just when problems arise
  • Service “Made in Germany” – development, production, and support at the same location

This means fast, competent and solution-oriented support, especially for B2B customers with technical requirements – whether standard devices or individual customization.

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