What is a Thermostatic Valve?

In this blog post, you’ll read:The thermostatic valve is a piece of radiator technology. It’s getting more popular day by day for its accessible functions and benefits. Here in this article, you’re going to know different types of hot selling thermostatic valves
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The thermostatic valve is a piece of radiator technology. It’s getting more popular day by day for its accessible functions and benefits. Here in this article, you’re going to know different types of hot selling thermostatic valves—also, their functions, problems, benefits, and other related things. So, let’s dig in…

Means of Thermostatic valve

A thermostatic valve is a valve that combines hot water and cold water to ensure the appropriate temperature in resulted water. In other words, a thermostatic valve takes both cold and hot water to mix them inside… and sends hot water to your shower or tub at a comfortable temperature. Also, it prevents scaling to protect you and your family.

From Webstone, a brand of NIBCO

Main Parts of a Thermostatic Valve 

The thermostatic valves are made with several components. Some of them are given below:

· Piston

This is a vital element in a thermostatic valve. It’s a rod-type thing that lies inside of the valve. The Piston takes signals from the thermostatic element and moves up and down accordingly. 

· Adjuster

From the name, you can assume what it does. It lies under the lockshield of the valve and controls the temperature inside. Generally, the Adjuster controls the Piston’s movement inside of the valve. Therefore, the valve maintains the proper quantity of cold and hot water to produce an acceptable temperature.

Img 0305

· Valve Seats

There are two empty chambers inside the valve. One side is for the hot water and the other side is for the cold water. These are known as valve seats. The hot valve seat lies on the downside, and the cold seat is on the upside. 

· Thermostatic Element

The thermostatic element is a temperature sensor. When there’s a need for a change in water temperature, it sends a signal to the system. Also, it shuts the system off in case of water fails.

· Return Spring

It’s a spring that is installed on the inner side of the valve. This brings the Piston back to its normal position. 

How Do Thermostatic Valve Works

Thermostatic valves are generally taken in hot water and cold water. Then mix them and make the appropriate temperature in output. That’s all a thermostatic valve does, but there’s a critical mechanism working behind it.

It takes hot water from your hot water source and cold water from your regular water supply. Then the thermostatic element measures the temperature. If the temperature is too high for use, then the Adjuster pushes the Piston down and blocks the hot valve seat. As a result, the hot water inlet stops. Similarly, for down temperature, the Piston closes the cold water inlet as needed. When the work is done, the spring pulls back the Piston to its normal position.

The system controls the movement of the Piston as much as necessary. In the event of a sudden cold water failure, there is a greater chance of scalding. In this case, the thermostatic valve shuts off the hot water supply through the output line so that your house and plumbing system is safe from danger.

From Caleffi Hydronic Solutions

Hot Selling Thermostatic Valves

There are many types of thermostatic valves available in the market, but not all sell well. So, we’ve got some valves here that people like to buy for use in 2021. And REMEMBER, you can get all these from Plumberstar.

3 Way Thermostatic Valve

3-way thermostatic valve has two inlets and one outlet. One inlet receives hot water from the boiler or water heater… and the other one takes cold water. Therefore, it mixes inside and sends warm water through the outlet.

This valve can take 5-29oc cold water and 50-100oc hot water. Moreover, it can mix up to 35-45oc with an adjustment accuracy of ±2oc. The material is pure brass with ≥ 8μm Nickel plating. Also, it has ABS handle and stainless steel spring. 

In addition, its unique ability is dual-purpose mixing or diverting. And when the cold water supply is interrupted, flow reduction occurs in seconds.

Mixed Water Thermostatic Valve

Mixed water thermostatic valve is the most popular valve. It is best for the HVAC system and status control of the water system. 

This valve has a 2-way body with a 90-degree rotary handle to control temperature and on-off. Also, it has a robust construction with raw brass for high temperatures and long life. Moreover, the actuator is equipped with a manual handle. So, it’s able to turn-open or turn-close the valve in case of a power cut or other emergency.

thermostatic valve works
thermostatic valve works

Thermostatic Radiator TRV

The thermostatic radiator TRV valve has two parts. The head part is consisting of an actuator and other thermostatic components. And the best part is the valve body. The material of the body part is copper and plastic for the head part.

This valve has a connection-mode of inner wire/outer wire. The applicable pressure is <1.6MPa and temperature – 20 ~150℃. Some good features of this valve are smooth inner wall, durable, strong, and safer use.

Rotary Actuator Mixing Diverting Valve

The structure and looks of the rotary actuator mixing diverting valve are similar to the radiator TRV. Also, it’s suitable for HVAC systems and water system status control. The actuator of this valve is using an asynchronous machine that drives the gears steady.

It has a rotation angle of 90-degrees and a rotation time of 60-120 seconds. Also, the operating temperature is -5oc, +50oc.

Feature and Benefits

Some features and benefits of the thermostatic valve are given below:

· Comes in different shapes and designs.

· Insensitive to dirt and water pressure.

· Operates automatically.

· Best fit at any position.

· Easy to install and use.

· Affordable price.

Common Problems

The first common problem of the thermostatic valve is the valve sticks or catches. This means it’s either stuck open or close. It happens when the setting is not moved for a long time. 

The second problem is, the thermostat doesn’t work properlyThe solution has to replace it properly if no hope to fix it


In conclusion, thermostatic valves are working for human comfort, and they do it perfectly. That’s why people love to add them to their plumbing list. We represented here some of the best-selling thermostatic valves and their functions. 

As you have read before, you can get all these valves from Plumberstar. And not only this, but Plumberstar also has other types of thermostatic valves and other brass valves. So, check the products and buy your happiness now.

works of thermostatic mix valves
works of thermostatic mix valves

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