Caleffi 656354 TwisTop Thermo-Electric Actuator 24V with Auxiliary Microswitch

The Caleffi 656354 is a TwisTop thermo-electric actuator designed for controlling two-way zone valves in hydronic heating and cooling systems. This normally closed, power-open/spring-return actuator operates on 24V AC or DC power with low energy consumption of just 3 watts.

Key Features:

• 24V AC/DC power supply with low power consumption (3W holding, 6VA inrush)
• Built-in auxiliary microswitch rated for 5A at 24V for end switch applications
• Manual opening capability via twist-top knob with automatic reset
• Visual pop-up position indicator shows when actuator is activated
• Opening time: 120-180 seconds; Closing time: 120-180 seconds
• Initial current draw of 250mA or less
• 31.5-inch (80cm) wire leads for easy installation
• Self-extinguishing polycarbonate protective shell with IP 40 protection class
• Operating temperature range: 0-50°C (32-122°F)
• Double insulation per CE standards

Compatible with Caleffi 676 Series two-way zone valve bodies, 1163 Series ThermoSetter manifolds, and 663/668S1 Series distribution manifolds. The TwisTop design allows for manual override by twisting the top to open or close the valve and microswitch. Gray color (RAL 9002). U.S. Patent 7,617,989 B2.