Two Port Valves
A Two Port Motorised Valve has 2 pipe connections (Inlet and Outlet ports) that permit or block flow between the ports depending on whether it is actuated or not. Flow is permitted when the valve is started (usually when the boiler is on) and blocked when the valve is off. Two Port Valves are only designed to control the flow for hot water or central heating, at one time. Two Port valves may also be referred to as Zone Valves.
