PMV28 2 Port Motorised Zone ValvePMV28 2 Port Motorised Zone Valve The electrically operated zone valve is designed to control the flow of water in a central heating system. The body is made of brass, on which an actuator with a return spring and a limit switch is mounted. It is possible to open the valve manually and lock it. The actuator is made in the NC version (closed currentless device). Characteristics Industry colour coded wiring with 1m cable Detachable head Standard