Belimo ZONE220S-50 Actuator

The Belimo ZONE220S-50 is a high-performance 2-way zone valve actuator designed for precise hydronic control in commercial and residential HVAC systems. Featuring a 3/4" sweat connection and a 5.0 Cv rating, this motorized valve assembly provides reliable shut-off and modulating services for fan coil units, baseboards, and radiant manifolds. The spring return mechanism ensures the valve returns to its fail-safe position during power loss, preventing overheating or flooding in critical loops. Engineered for high-differential pressure applications, the Belimo ZoneTight technology minimizes leakage and reduces energy consumption by maintaining tight shut-off against high pump heads.

Technical Specifications & Benefits:

• Flow Capacity: 5.0 Cv rating optimized for 3/4 inch residential and light commercial hydronic loops.
• Connection Type: Field-ready 3/4" sweat (solder) connections for a leak-proof, permanent installation.
• Actuator Type: Synchronous motor with localized manual override for easy commissioning and troubleshooting.
• Media Compatibility: Rated for chilled or hot water and glycol solutions up to 50% concentration.
• Pressure Rating: Designed to handle high close-off pressures without seat leakage or mechanical chatter.

Common Installation & Application Questions:

What is the maximum fluid temperature for the ZONE220S-50?
This unit is typically rated for media temperatures ranging from 32°F to 212°F, making it suitable for both cooling and heating applications.

Can this actuator be mounted in any orientation?
For optimal longevity, the actuator should be mounted vertically or horizontally; mounting upside down is not recommended as it may allow condensation to enter the motor housing.

Is the power head replaceable without draining the system?
Yes, the twist-lock design allows for the removal of the Belimo actuator from the valve body without breaking the hydronic seal, saving significant labor time during service calls.

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.