The Danfoss HS3 is a 3-port motorized mid-position valve used in heating systems, particularly for central heating applications.

Here are its key features:

• 3-Port Design: The valve has three connections: one for the hot water supply, and two for the heating zones (typically one for heating and one for the domestic hot water cylinder). This allows it to direct flow to either or both circuits.
• Mid-Position Functionality: It can be set to a mid-position, meaning it can balance the flow between the heating system and the hot water cylinder supply, making it ideal for systems that require both functions.
• 22mm Connection Size: This valve is designed to fit standard 22mm pipework, which is common in many heating installations.
• Motorized Operation: The valve is electronically controlled, typically via a thermostat or a control system, allowing for automatic regulation of heating based on demand.
• Efficiency and Comfort: By controlling the distribution of hot water, the HS3 helps maintain desired temperatures in different zones of a building, enhancing comfort and energy efficiency.

Overall, the Danfoss HS3 is a crucial component for optimizing heating system performance and managing temperature control effectively.