Danfoss 193B-1603 ARA664 Actuator

The Danfoss 193B-1603 (ARA664) is a high-torque 3-point floating actuator engineered for precise modulation of DN15-50 mixing valves. Operating on a 24V AC power supply, this unit provides 6 Nm of torque with a 90-degree operating range optimized at a 96-second run time. The integrated auxiliary switch allows for seamless end-stop signaling or interlocking with external pumps and boilers, critical for complex hydronic balancing. Its compact design features a manual override knob for emergency positioning and troubleshooting without system downtime. This actuator is specifically designed for use with ESBE VRG and VRB series rotary valves, ensuring a secure mechanical interface and reliable flow control in commercial HVAC and heavy-duty residential heating applications.

• Precise 3-Point Control: Enables accurate incremental positioning for stable temperature regulation in mixing applications.
• Integrated Auxiliary Switch: Prefitted microswitch provides dry contact feedback for system automation and status monitoring.
• Standard 96s Run Time: Optimized stroke speed prevents water hammer and minimizes valve hunting in variable load systems.
• Direct Mount Compatibility: Engineered for seamless integration with Danfoss and ESBE rotary valve bodies using standard linkage kits.
• Compact Enclosure: Low-profile footprint allows for installation in tight mechanical closets and manifold cabinets.

What is the control signal for the ARA664?
This model utilizes a 3-point floating (open/stop/close) control signal, making it compatible with most standard hydronic controllers requiring 24V inputs.

Can this actuator be manually operated?
Yes, the front-mounted knob allows for manual positioning. Ensure the power is disconnected or the controller is in manual mode to prevent gear stripping.

Is the auxiliary switch adjustable?
The internal switch is factory-set to provide feedback at specific points in the rotation, typically used to confirm the valve has reached its end position.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.