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How Thermostatic Radiator Valves Work to Control Temperature Across Rooms?

How Thermostatic Radiator Valves Work to Control Temperature Across Rooms?

How do you keep your room warm and heated? Most of the people will say – by using a radiator. And how do you control the temperature of a particular room? By using the thermostatic radiator valve.

A thermostatic radiator valve (TRV) is undoubtedly the most important component of a radiator. 

How Does a Thermostatic Radiator Valve Work?

It is a self-regulating valve that changes the flow of the hot water to the radiator to keep the temperature at the desired range. This guide will help you get to know more about the thermostatic radiator valves TRVs, to get the best out of them and to be able to fix minor issues yourself.

The basic functionality of the radiator valve is that it adjusts water flow, from the boiler into the radiator.

A TRV consists of two parts:-


  • Thermostatic Head – It has a capsule or an actuator that expands and contracts with the rise and fall in the temperature.
  • Valve Body – It consists of a sprung plunger or a pin that closes the water supply when the thermostatic head capsule expands, and opens the water supply when the head capsule contracts.

The radiator works as a combination of both these components, which allows for automatic control of the temperature depending on how you have set the valve.

One of the best things about a TRV is that it provides you with automatic control of each room’s air temperature. You get your home, room or property heated efficiently without shooting up energy bills.

Types of TRV Designs

TRVs come in two primary designs:

  • Liquid TRV – This design means it contains a liquid capsule. It is much more efficient as water is better at responding to room temperature changes. It enables the room to get heated up quickly.
  • Wax TRV – It is cheaper to liquid TRV design; however it is also slower to contract or expand.

There are also TRV designs wherein the actuator comes with gas filled inside the thermostat.

How You Should Control Room Temperature Using Thermostat?

You just have to turn the handle on the thermostat which will adjust the distance up to which the actuator can expand to close the valve. This is represented on a scale of 1 to 5 on most TRVs. Higher scale you adjust to, the warmer your room will become before the valve gets closed.

For efficient heating up of every room individually, thermostatic radiator valves are a great and worthy addition. These are energy efficient and great in monetary saving as well.



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