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BELIMO

Belimo is a Swiss manufacturer of actuators and valves for heating, ventilation, and air conditioning (HVAC) systems. Founded in 1975 and headquartered in Hinwil, Switzerland, the company specializes in damper actuators, control valves, and sensors used in commercial and industrial building automation. Belimo's product line includes fail-safe (spring return) and non-fail-safe (non-spring return) actuators for dampers, as well as zone valves with 2-way and 3-way configurations. Actuators are available in torque ratings from 22 in-lb to 360 in-lb, with input voltages of 24V AC/DC, and support control signals such as floating point, on/off, and proportional (2 to 10V DC). Many models carry NEMA 2 / IP54 ingress protection ratings, suitable for indoor environments. Belimo also offers Multi-Functional Technology (MFT) actuators, which allow field-configurable control parameters. The zone valves feature flow rates (Cv) ranging from 4.6 to 9.8, with 3/4 in female NPT connections and non-spring return electric actuation. 3G Electric supplies Belimo actuators and valves globally, supporting plant engineers and maintenance managers with a range of models for damper control, zone temperature regulation, and HVAC system balancing. The product selection covers both standard and plenum-rated units, with hardwired connections for reliable integration into building management systems.

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About BELIMO

Belimo is a Swiss manufacturer of actuators and valves for heating, ventilation, and air conditioning (HVAC) systems. Founded in 1975 and headquartered in Hinwil, Switzerland, the company specializes in damper actuators, control valves, and sensors used in commercial and industrial building automation. Belimo's product line includes fail-safe (spring return) and non-fail-safe (non-spring return) actuators for dampers, as well as zone valves with 2-way and 3-way configurations. Actuators are available in torque ratings from 22 in-lb to 360 in-lb, with input voltages of 24V AC/DC, and support control signals such as floating point, on/off, and proportional (2 to 10V DC). Many models carry NEMA 2 / IP54 ingress protection ratings, suitable for indoor environments. Belimo also offers Multi-Functional Technology (MFT) actuators, which allow field-configurable control parameters. The zone valves feature flow rates (Cv) ranging from 4.6 to 9.8, with 3/4 in female NPT connections and non-spring return electric actuation. 3G Electric supplies Belimo actuators and valves globally, supporting plant engineers and maintenance managers with a range of models for damper control, zone temperature regulation, and HVAC system balancing. The product selection covers both standard and plenum-rated units, with hardwired connections for reliable integration into building management systems.

Common Applications

  • Commercial HVAC damper control — Belimo GMB24-SR proportional actuator for modulating air volume in VAV systems
  • Hydronic zone temperature regulation — Belimo Z3075Q-J+CQB24-3 3-way zone valve for radiant floor heating loops
  • Smoke management systems — Belimo TFB24-SR spring return actuator for fire damper closure on power loss
  • Industrial ventilation balancing — Belimo NMB24-SR non-spring return actuator for large duct dampers in factories
  • Chilled water valve actuation — Belimo Z2075Q-K+CQB24-3 2-way zone valve for fan coil unit control
  • Multi-purpose damper control — Belimo LF24-MFT MFT actuator with configurable signal for retrofit projects

Frequently asked questions

Common questions about BELIMO from 3G Electric.

What is the difference between Belimo fail-safe and non-fail-safe actuators?

Belimo fail-safe actuators incorporate a spring return mechanism that automatically returns the damper or valve to a predefined position (typically closed or open) upon power loss. Non-fail-safe actuators do not have a spring return and require continuous power to maintain position. Fail-safe models are used in applications where safety or system protection is critical, such as smoke control or freeze protection. Non-fail-safe models are suitable for general HVAC control where power interruption is not a concern.

What control signals are supported by Belimo actuators?

Belimo actuators support several control signal types: floating point (3-point), on/off (2-point), and proportional (analog) signals such as 2 to 10V DC or 4 to 20 mA. The specific signal type depends on the model. For example, the GMB24-SR actuator uses a proportional signal, while the AMB24-3 uses floating point/on/off. Multi-Functional Technology (MFT) models allow field configuration of the control signal via a DIP switch or software.

What is the typical torque range for Belimo damper actuators?

Belimo damper actuators are available in torque ratings from 22 in-lb to 360 in-lb. Smaller torque actuators (e.g., 22 in-lb, 45 in-lb) are used for light-duty dampers in VAV boxes or small zone dampers. Higher torque actuators (e.g., 180 in-lb, 360 in-lb) are designed for larger dampers in air handling units or industrial ventilation systems. The torque requirement depends on damper size, blade type, and system pressure.

Are Belimo zone valves compatible with 24V AC/DC systems?

Yes, Belimo zone valves, such as the Z3075Q-J+CQB24-3 and Z2075Q-K+CQB24-3, are designed for 24V AC/DC power. They use non-spring return electric actuators with floating signal control. The valves have 3/4 in female NPT connections and flow rates (Cv) of 4.6 or 9.8, making them suitable for hydronic zoning in commercial HVAC systems. Always verify the actuator voltage and signal type match your control system.

What is the IP rating of Belimo actuators?

Many Belimo actuators, such as the GMB24-SR and TFB24-SR, carry a NEMA 2 / IP54 rating. IP54 indicates protection against dust ingress (limited) and water splashes from any direction. This makes them suitable for indoor installation in mechanical rooms, plenums, or equipment cabinets. For outdoor or wet environments, Belimo offers actuators with higher IP ratings, such as IP66, but those are not listed in the current product range.

Can Belimo actuators be used in plenum spaces?

Yes, certain Belimo actuators are plenum rated, meaning they meet fire and smoke safety standards for installation in air-handling spaces. For example, the TFB24-SR actuator is specified as plenum rated. Plenum-rated actuators are constructed with materials that do not emit hazardous fumes in a fire, complying with building codes. Always check the product specifications for plenum rating before installation in such spaces.