Drayton mid-position valves allow the flow of water from the valve inlet to be directed to either of two outlets, or through both at the same time (mid-position). Power from room and cylinder thermostats enable the valve's electronic circuitry to close either one of the outlet ports or to hold the swivel seal in the mid-position with both outlets open. The Drayton MA1 3 Port Actuator 230v 27651 features new snap-on actuators and have industry-standard wiring and dimensions. Product features 230V voltage 1 m lead length Mid position actuator 100% shut off Power to open / spring return Valve position indicator Simple industry-standard wiring Manual lever Mid position for heating or hot water or both