The Danfoss HP22 is a type of motorized zone valve used in heating systems, particularly in hydronic heating applications. It features a 22mm connection size and is designed to control the flow of water in a system, allowing for efficient heating by regulating the temperature in different zones of a building.

Here are some key features:

• Motorized Operation: The valve is electrically operated, meaning it can be opened or closed remotely based on thermostat signals.
• 2-Port Design: It has two ports—one for the inlet and one for the outlet—allowing water to flow through when the valve is open.
• Compatibility: Typically used with various heating systems, including radiators and underfloor heating.
• Durability: Built to withstand the pressures and temperatures commonly found in heating systems.

Overall, the Danfoss HP22 helps enhance comfort and energy efficiency by enabling precise control of heating in specific areas.