What is the difference between a mixing valve and a 3 way valve

A mixing valve and a 3-way valve serve different purposes in plumbing or HVAC systems:

Mixing Valve:

Function: A mixing valve combines hot and cold water streams to regulate the temperature of the outgoing water. It ensures a consistent, predetermined temperature for applications like showers or faucets.

Operation: Usually, a mixing valve has both hot and cold water inputs and a single output that delivers water at the desired temperature. It adjusts the proportions of hot and cold water to achieve the set temperature.

3-Way Valve:

Function: A 3-way valve is used to control the direction of flow or to mix two different fluids. It diverts flow between two outlets or mixes fluids from two inputs.

Operation: It has three ports (inlet, outlet A, outlet B) and can be set to direct flow between the ports according to the valve's design. For example, in heating systems, a 3-way valve might control whether heated water flows to the radiators or back to the boiler.

In summary, a mixing valve controls the temperature of water by blending hot and cold water, while a 3-way valve manages the direction or mixing of fluids between different ports or pathways. Their functions and mechanisms differ based on the specific needs of the system they are integrated into.