Servo drive, 24V (continuous 0-10V)

Product detailed description

This 24V servo drive is designed for integration with IVAR’s MIX and KZ series mixing valves in central heating applications. It enables precise control of fluid flow to maintain desired system temperatures. The device is commonly used in residential and commercial buildings with hydronic heating systems, where accurate modulation of flow is required. Installers typically encounter this component in boiler circuits, underfloor heating systems, and radiant panel installations where temperature stability is critical.

The unit is engineered for environments where electrical and hydraulic conditions demand reliable performance. Its compact design allows for straightforward mounting near the valve body, reducing the need for complex piping adjustments. The actuator supports manual override options, which is essential for troubleshooting or emergency adjustments in the field. The drive’s rotational movement is limited to 90°, ensuring compatibility with standard quarter-turn valve configurations.

Technical parameters

Weight	0.41 kg
Code	1920752
Brand	IVAR

The listed parameters define the operational limits and capabilities of the actuator. The torque output of 5 Nm ensures sufficient force to operate standard mixing valves within their expected range. The time constant of 70 seconds indicates the response time during modulation, which is important for determining how quickly the system can adjust to load changes. The IP42 protection rating means the device is suitable for indoor use and protected against splashing water from any direction. These values assist in verifying compatibility with existing valve types and control systems.

Installation and connection

Mounting the actuator requires securing it directly to the valve stem using the provided fasteners. Ensure the valve is in the fully closed position before attaching the actuator to align the drive mechanism correctly. Connect the 24V power supply via the terminal block, matching the wiring diagram provided in the manufacturer’s documentation. Verify that the control signal (0-10V) is sourced from a compatible controller or thermostat. Common errors include misalignment between the actuator and valve stem, incorrect polarity, and failure to isolate the system during installation. Always test the actuator manually after mounting to confirm smooth operation and correct positioning.

Compatibility and accessories

This actuator is specifically designed for use with IVAR’s MIX 3, MIX 4, and KZ series mixing valves. It is also suitable for boiler assemblies that support manual override. When ordering, ensure that the associated valve is equipped with the necessary interface for the actuator. Additional components such as control modules or wiring harnesses may be required depending on the system configuration. No specific accessories are included with the actuator itself.

Technical background for designers

The actuator operates via an electric motor that converts the input voltage into rotational motion. The motor is coupled to a gear train that amplifies torque while reducing speed to match the valve’s requirements. The housing is constructed from durable materials to withstand typical indoor conditions, and the internal components are sealed to prevent ingress of dust and moisture. Integration into the system requires a stable 24V power supply and a compatible control signal source. Long-term performance depends on maintaining clean valve stems and ensuring the control signal remains within the specified voltage range.

Service and operation

Periodic inspection of the actuator includes checking for signs of wear on moving parts and ensuring the electrical connections remain secure. Lubrication of the drive mechanism is not recommended unless specified by the manufacturer. If the actuator fails to respond to control signals, verify the power supply and signal integrity. In cases of erratic movement, disassemble the unit and inspect for obstructions or mechanical binding. No scheduled service intervals are defined in the technical documentation.

Frequently asked questions

Can this actuator be used with valves outside the MIX and KZ series?
No, it is specifically designed for IVAR MIX 3, MIX 4 and KZ series valves.

Is a separate control module required for operation?
A 0-10V control signal is required, but no additional module is included with the actuator.

Can the actuator be operated manually in the event of a power failure?
Yes, the design includes an option for manual override.

What type of power supply is needed for this actuator?
A stable 24V supply with 50/60 Hz frequency is required for proper function.