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Motorized Valve

Water heating systems include motorized valves and pumps connected to your cylinder which can fail resulting in no hot water or central heating.

Motorized valves are a type of electrically actuated valve controlling flow of water in the central heating system, actuated by the head: this part is often known as the ‘body’.

Valves are commonly found in the following configurations:

2-port

The valve has 2 pipe connections (ports) and allows or blocks flow between the ports depending on whether it is actuated or not. Flow is allowed when the valve is actuated and blocked in its resting state.

When the valve is energised a synchronous motor drives the valve to the open position until the motor stops and stays in that position. When the valve is required to close then power is removed and a spring pulls the mechanism (and the motor) back, returning it to its original, closed, position.

3-port

The valve has 3 pipe connections, in a T formation. The centre leg of the T is the inlet and the two short arms are the outlets. When the valve is actuated all flow is diverted from one port to the other. When deactivated, a spring returns flow back to the original port – there is no mid position that can feed water to both ports at once.

Honeywell 3-port mid-position spring-return valve

The most common type and make of valve found in domestic Central Heating systems. There are two types of 3-port valve:

Diverter valve

This is a simple change-over version of a 3-port valve: when the valve is actuated all flow is diverted from one port to the other. When deactivated, a spring returns flow back to the original port – there is no mid position that can feed water to both ports at once.

Mid-position valve

In this type of valve there is a middle state in which flow from the inlet can pass to both (A and B) outlet ports simultaneously. This type of valve is commonly found in domestic central heating systems where it controls flow of hot water from a boiler to hot water and radiator circuits.

Contact us for assistance to quickly repair your motorized valve,or for an estimate for the installation of a new motorized valve.

Motorized Valve services in Newcastle upon Tyne

  • Motorized Valve Fault Diagnosis
  • Motorized Valve Repairs
  • Motorized Valve Leak
  • Motorized Valve Installation
  • Motorized Valve Fitting
  • Motorized Valve Replacement