The V4073A Valve has been designed to control the flow of water in domestic central heating systems, where both radiator and hot water cylinder circuits are pumped. It is typically suited for small to medium sized installations"
2 Port Motorised Zone valve, designed to operate as on-off regulators in closed water circuits in central heating, hot water and climate control installations. The 2 way valves are direct flow models, with the circulation direction from way A to way B, and normally closed in A (powered down). When power is applied to the motor, the valve opens and the microswitch closes (is there is one). In the event of a power failure, the valve automatically returns to the closed position at A, In this case, a cam enables the valve to be to be activated manually. This feature is also useful for the filling, bleeding or emptying of an installation."
The isolation valve sits underneath the heating appliance and enables the user to regulate the flow of gas and water in to the central heating system. These also allow for the supply to be stopped completely in case of an emergency or a leak.
The isolation valve is located underneath the boiler and allows the user to manipulate the flow of water and gas in to the central heating system. These also allow you to stop the flow completely in case of a leak or emergency .