Sekoitusventtiili

Sekoitusventtiili, known in English as a mixing valve, is a mechanical device used to regulate the temperature of fluids, most commonly water. Its primary function is to combine hot and cold water streams in precise proportions to achieve a desired output temperature. This is particularly important in domestic hot water systems where delivering water that is too hot can pose a scalding risk.

There are several types of sekoitusventtiilit. Thermostatic mixing valves (TMVs) are the most sophisticated, using a temperature-sensitive element to automatically adjust the mix as the incoming hot or cold water pressure or temperature fluctuates, ensuring a consistent output. Manual mixing valves require adjustment by hand and are less precise. Some modern systems integrate mixing functions into larger heating control units.

The operation of a typical thermostatic mixing valve involves a wax element or bimetallic strip that expands or contracts with temperature changes. This movement controls internal valves that regulate the flow of hot and cold water. If the water gets too hot, the element expands, reducing the hot water flow and increasing the cold water flow until the desired temperature is reached. Conversely, if the water cools down, the element contracts, allowing more hot water to enter the mix.

Sekoitusventtiilit are commonly found in showers, baths, sinks, and underfloor heating systems. They play a crucial role in safety by preventing scalding and in efficiency by ensuring water is delivered at the optimal temperature, thereby avoiding unnecessary energy consumption for reheating or over-cooling. Regular maintenance, such as descaling, can ensure their continued optimal performance.