The Drayton 22 mm 2-Port Valve and Actuator (27100) is a motorised control valve assembly used in central heating systems to automatically control the flow of heated water in a single circuit. It integrates a valve body with an actuator motor that responds to thermostat or controller signals to open or close the flow path.

Function & Purpose

This 2-port valve allows water to either flow through or be shut off from a particular heating circuit based on demand. When a room thermostat or controller calls for heat, the actuator drives the valve open so hot water can circulate through radiators or underfloor heating. When the demand ends, the valve closes, stopping flow. This automatic control improves comfort, energy efficiency, and system responsiveness without requiring manual valve operation.

Compatibility

The valve and actuator are designed for 22 mm pipework, a common size in domestic and light commercial central heating systems. It connects to standard heating controls, room thermostats, programmers, and boiler interfaces that provide the typical open/close signals used for 2-port valve control.

Ideal Applications

This 2-port valve and actuator unit is ideal for:

Homes and properties where single-circuit control of heating flow is needed
Systems with a single heating zone or where a section of the system needs simple on/off control
Integration with room thermostats and basic heating programmers
Combining with existing boiler installations during servicing or upgrades

It provides a straightforward, efficient way to automate water flow in central heating systems, helping to maintain comfort and reduce energy waste.