The Danfoss HS3 3-Port Valve with Actuator (087N661300) is a robust motorised control valve used in central heating and hot water systems to automatically manage the distribution of heated water between two circuits. It combines a durable valve body with a reliable actuator for precise control of water flow.

Function & Purpose

This 3-port valve can direct water flow to heating, hot water, or both simultaneously, based on the demands of the system controls (such as a room thermostat, cylinder thermostat, or programmer). When there is a call for heat to radiators, the valve shifts to route flow to the heating circuit. When domestic hot water is required, it shifts to route flow to the cylinder. In mid-position, it can allow flow to both circuits if the control signal requires. This automatic switching improves comfort and system efficiency by ensuring water is delivered where it’s needed without manual intervention.

Compatibility

The valve is designed for standard central heating pipework (typically 22 mm or 28 mm depending on the specific variant) and works with common heating control systems that provide standard motorised valve control signals. The 087N661300 actuator is matched to the HS3 valve body to provide smooth and reliable movement.

Design & Build Quality

The valve body is constructed from quality materials for durability, and the actuator provides dependable motorised control with quiet operation. The valve and actuator assembly is engineered to withstand the operational pressures and temperatures common in domestic and light commercial heating systems.

Ideal Applications

This 3-port valve is ideal for zoned heating systems where separate control of heating and hot water circuits is required. It is commonly used with conventional boilers and systems that have separate cylinder and radiator controls, and is suitable for new installations, retrofits, and replacements where automatic flow management between circuits is needed.