Danfoss 088H-3120 24V Operator

The Danfoss 088H-3120 is a heavy-duty 24V thermal actuator engineered for precise on/off control in hydronic heating and cooling systems. Specifically designed for the TWA-V series, this normally closed (NC) operator provides seamless integration with Danfoss RAV and VMT/8 connection valve bodies. Built for the rigors of commercial and residential HVAC environments, it features a slow-acting thermal wax element that eliminates water hammer—a common failure point in fast-acting solenoid alternatives. The unit operates on a standard 24V AC/DC supply and maintains a low power consumption of 2W, making it an energy-efficient choice for multi-zone manifold systems. With a built-in visual position indicator, technicians can verify the valve status at a glance without specialized tools. This actuator includes a 0.95m cable and is rated IP41 for protection against condensation and vertical water drops, ensuring reliable performance when mounted on radiator valves or floor heating manifolds.

• Optimized Compatibility: Designed specifically for Danfoss VMT and RAV valve bodies, ensuring a perfect mechanical fit and correct closing pressure.
• Water Hammer Prevention: Utilizing a thermal wax element ensures quiet, slow-acting operation to protect pipework and valves from pressure surges.
• System Efficiency: Low 2W power consumption reduces the load on the 24V Class II transformer in large-scale hydronic floor heating installations.
• Instant Diagnostics: The integrated visual indicator provides immediate confirmation of the normally closed position, simplifying troubleshooting for service contractors.
• Simple Installation: Standard two-wire connection and compact form factor allow for easy mounting in tight manifold cabinets.

Which valve bodies are compatible with the 088H-3120?
This operator is designed for Danfoss VMT (specifically 065F0102 and 065F0104) and RAV valve connections. If you are using RA2000 valves, the TWA-A series (088H3110) is required instead.

What is the default position of this actuator during a power failure?
This is a normally closed (NC) model, meaning the valve will remain closed when no power is applied to the unit.

Can this be used with 24V DC systems?
Yes, the Danfoss 088H-3120 is rated for both 24V AC and 24V DC power supplies, providing flexibility for different control architectures.

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.