Thermostatic Valve

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What is a Thermostatic Valve

Thermostatic valve is a mechanical valve with a temperature sensor. These valves, which are installed at the hot water inlet of the honeycombs, also known as radiators, keep the temperature of the environment in balance according to people's preference. The temperature sensor measures the temperature inside the valve and allows the valve to open or close according to this value. In this way, changes in room temperature are automatically detected and the water flow is adjusted accordingly.

Benefits of Thermostatic Radiator Valves

01.

Comfort

Individual room temperature control means no more battling over the thermostat, as you can set each room to your preferred temperature for maximum comfort.

02.

Efficiency

By heating only the rooms you need, you waste less energy, leading to potential savings on your heating bills.

03.

Reduced carbon footprint

Lower energy consumption translates to a smaller carbon footprint, making your home — and you — more eco-friendly.

04.

Improved boiler performance

TRVs can help regulate the overall heating demand on your boiler, leading to smoother operation and potentially extending its life span.

What Are Thermostatic Valve Degrees

A straight thermostatic radiator valve usually operates in temperature ranges from 0°C to 28°C. However, some models can operate from -10°C to 30°C. The degree of the valve can be adjusted according to the user's wishes and the type of system. However, a temperature setting of 15 degrees is the generally accepted lower temperature usage. Users can adjust the degree of the valve according to personal preferences or special health conditions.
The valves are very easy to adjust. Minimum flow is set using the screw at the bottom of the valve. This adjustment allows a faster response to temperature changes. Degree adjustments can be made according to levels from 1 to 5 on the valve. You can adjust the temperature by turning this adjustment dial on the sensor.

How Do Thermostatic Radiator Valves Work

A thermostatic radiator valve is composed of two primary parts. There's a valve body that mounts on the radiator. Above that sits a valve head with a dial. Typically, the dial features a scale from zero to five or six, which corresponds to how little or how much heat the radiator is producing.
An actuator inside the valve head senses the relative temperature of a room. It expands as a room heats up, which moves a pin in the valve body. The pin then forces the valve body to close, stopping the flow of steam (or sometimes hot water in hydronic systems) to the radiator. Once the room cools a bit, the sensitive capsule in the valve head contracts again, releasing the pin in the valve body, so more steam can again enter the radiator.
The scale on the TRV dial represents the distance the actuator has to move in order to cause the valve body pin to close the valve. One is the smallest distance, with the largest number being the greatest distance.

Types of Radiator Valve Fittings

There are several different radiator valve fittings, so it's essential to check you have the correct valve for your radiator.

Angled radiator valves

An angled valve is better for radiator pipes that use a 90 degree angled turn to connect to the radiator. They work particularly well in modern homes with concealed pipework under the floor. You might be able to use corner valves as well, but this will depend on the connection angle between your radiator and pipework.

Straight radiator valves

If your pipe runs straight along the wall to the valve, then you need a straight radiator valve. Water flows straight through straight valves rather than flowing at an angle. A straight valve is commonly used for heated towel rails and radiators, which need to be hung higher up than usual, as the connection point for the pipe and valve are in a straight line.

Corner radiator valves

Corner radiator valves are sometimes known as flat front valves. You need to use a corner valve when the pipework comes from the wall rather than the floor. The top of the valve faces in rather than out like angled valves, sitting parallel with the wall.

Thermostatic Valve Connection

As mentioned above, a thermostatic valve is used to control the temperature within a heating system. You can install it easily by following the steps below, or you can also seek the help of an expert to make sure that the valve is installed correctly.
1. The first step is to remove the old valve. To remove the old valve, unscrew the valve using the tap wrench. When removing the valve, make sure that the installation is switched off.
2. You also need to measure the diameter of the pipe where the valve will be placed. To make sure that the valve is the right size, the diameter of the pipe and the diameter of the valve should be compared.
3. The connection points of the valve must be the same size as the connections on the pipes. If the ports are different sizes, adapters can be used to match them.
4. Before connecting the valve, the water system must be completely shut off. It may be necessary to drain the water from the pipe to completely drain the water in the area where the valve is to be installed. Apply several turns of Teflon tape over the valve thread. This will seal the valve.
5. Then it is necessary to clean the valve seat. To do this, use a cloth or towel. Remove all debris and dirt.
6. Suitable gaskets are placed on the connection points of the valve. Make sure that the gaskets are the right size and are tightly fitted.
7. The connection points of the valve are screwed tightly to the pipes. Using the clamp wrench, tighten the thermostatic valve. Make sure that the valve connection is tight. In this step, make sure that the pipes are placed in the correct direction.
8. The adjustment knob and cover of the valve are installed. The adjustment knob is used to adjust the temperature. The cover protects the mechanisms inside the valve. How to use the adjustment switch is specified in the user manual of thermostatic valves.
9. The connection points are checked to ensure that the connections of the valve are tightly fitted. The water system is turned on again and the valve is checked for operation.
It may be better to have an expert in plumbing work make the connection. If done incorrectly, this can cause serious water leakage problems and damage.

Things to Consider With Thermostatic Radiator Valves

While TRVs offer significant benefits, a few things require your attention

Placement

Ensure furniture or curtains don't block the TRV and impact its ability to sense the room temperature accurately.

Maintenance

Like any mechanical device, occasional maintenance is crucial, so check for leaks and ensure the valves operate smoothly.

Compatibility

Not all TRVs work with all heating systems, so it's prudent to consult a professional or the manufacturer's instructions to ensure compatibility before installation.

Do You Need Thermostatic Radiator Valves

The need for TRVs depends on your specific heating system and preferences. However, here are some scenarios where installing TRVs is highly recommended

Multi-Room Homes

If you have a house with multiple rooms, TRVs are an excellent addition, as they allow precise temperature control in the heating zones of each room.

Conservation

If you're conscious of your consumption and want to reduce your heating bills, TRVs are a cost-effective solution to save energy.

Zoned Heating Systems

If you have a zoned heating system, TRVs become indispensable, as they enable you to control ambient temperature in each zone independently.

What Do the Numbers on a Thermostatic Radiator Valve Mean

Thermostatic Radiator Valves (TRVs) are a very simple way to give you full and individual temperature control over all radiators that you have TRVs installed on.
The main benefit of them are that they will save you money on your heating bills, if used correctly.
There are numbers on the thermostatic valve and many people make the mistake of thinking that they refer to the temperature of the radiator.
The very point of a thermostatic radiator valve is that it can detect the temperature in the room and will let more or less hot water into the radiator accordingly.
The numbers on the valve roughly correlate to the room temperatures below. When the room drops below these temperatures, the TRV will allow hot water to flow into the radiator. It's worth familiarising yourself with the numbers and the temperatures they relate to so that you have maximium control over the temperature in each room in your home.
0 = Off
* = 7°C
1 = 10°C
2 = 15°C
3 = 20°C
4 = 25°C
5 = 30°C
A fully functional TRV will detect the temperature of the room and automatically adjust the amount of hot water in the radiator accordingly.
During the winter, you should really set your TRV to 2 or 3 and leave it. If you go into a room that's cold and the radiator is burning hot, leave it alone and don't turn it up to 5. Let it do it's job and allow the TRV to heat the room accordingly.

What Is a Thermostatic Head

The thermostatic head is a device installed on a radiator that allows you to automatically regulate the flow of hot water into that radiator. The head will increase or decrease the flow of hot water to the radiator depending on the ambient room temperature. This allows you to set the valve to stay open until the temperature you want to reach is achieved. If the temperature then drops the valve will reopen.
The main element of the thermostatic head is the control "motor" containing a specific thermostatic liquid. The liquid will expand or contract depending on the room temperature. If the temperature in the room is higher than the pre-set one (e.g. 20°C) on the valve, the thermostatic liquid will increase in volume causing the actuator (cylindrical body similar to a plug) to move, closing the valve which in turn reduces the flow of hot water into the radiator. If the ambient temperature is lower than the set temperature, the reverse process occurs, and the valve opens and the radiator will heat up.

Correct Use of Thermostatic Heads

Keep the thermostatic head as free as possible, (the room temperature sensor must be able to detect the temperature inside the room). Remove anything that prevents normal air circulation near the radiator (curtains, furniture, radiator covers, shelves).
Remove any heat sources (such as ovens or stoves).
Close the valve when you have doors or windows open, keeping windows open and your heating system on at the same time wastes a lot of heat and money!
Leave the head fully open at position 5 during the summer period, so as to avoid the formation of limescale and the consequent blockage of the head.
Leave the valve on 1/2 in rooms that are not in use or if you leave the house empty for a few days.

Our Factory

Zhejiang AODEHUA Technology Co., Ltd. is located in the beautiful and rich East China Sea - Yuhuan City.
It is a famous coastal city in China for the production of water heating valves. Production has a long history, strong technical force.
38 kilometers away from Wenzhou airport, land and sea and transportation is very convenient.
Founded in 2002, Aodehua Group specialized in the production of brass water plumbing valves for more than 20 years.
Set development, forging, manufacturing, testing, sales as one, superb technology, stable and reliable quality make "AOHUA" products win the favor of consumers.

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FAQ

Q: What does a thermostatic radiator valve do?

A: A TRV comprises a head and a body and it controls the flow of water to your radiators. When the room reaches the set temperature, it stops radiators from getting any hotter.

Q: Are thermostatic radiator valves worth it?

A: Because your boiler isn't using as much energy to heat up the full heating system, it means that your energy bills will be lower too! In fact, studies have shown that households could save over 40% on their energy bill by using TRVs - well worth the investment!

Q: When should you use a thermostatic radiator valve?

A: If the ambient temperature is lower than the set temperature, the reverse process occurs, and the valve opens and the radiator will heat up. Thermostatic heads help to reduce waste and improve comfort by stabilizing the temperature in each room as required.

Q: What is the difference between thermostatic and non thermostatic radiator valves?

A: Manual valves usually have no numbers or buttons. There may be plus and minus (or on and off) signs on a manual valve, indicating the direction you need to turn it to. Unlike thermostatic valves, manual valves have no pin that can be pushed in and out.

Q: What is the difference between radiator valve and thermostatic valves?

A: With manual valves, you'll need to manually turn these on or off to control the heating or use a timer-controlled central heating system. However, a thermostatic radiator valve contains a sensor that automatically turns on or off depending on the room temperature.

Q: Do all radiators need thermostatic valves?

A: However, while TRVs can, technically, be installed on all radiators, it's usually a good idea to leave one radiator without a TRV and permanently switched on. Ideally, this should either be a bathroom, which would usually benefit from permanent heat, or the room with the thermostat in it.

Q: How long do thermostatic radiator valves last?

A: Approximately 10-15 years. Generally, standard TRVs have an average lifespan of approximately 10-15 years.

Q: Where do you put the thermostatic valve on a radiator?

A: Most modern thermostatic radiator valves are bi-directional – so can be fitted on either the flow or return pipe of your radiator. However, it's always best practice to fit the TRV on the flow pipe that enters your radiator.

Q: Which side do you put a thermostatic radiator valve?

A: Thermostatic Radiator Valves (TRVs) can be fitted on either the flow or the return side of the radiator. However, it's generally recommended to fit them on the flow side, as this is where the hot water enters the radiator, and the TRV can better regulate the temperature of the radiator from this position.

Q: What is the best setting for a thermostatic radiator valve?

A: During the winter, you should really set your TRV to 2 or 3 and leave it. If you go into a room that's cold and the radiator is burning hot, leave it alone and don't turn it up to 5. Let it do it's job and allow the TRV to heat the room accordingly.

Q: Do new radiators come with thermostatic valves?

A: It's worth noting that if you buy a new radiator they will not normally come with valves. This is because you need to pick the radiator valve to suit your own individual pipework. Often, people forget that both a lockshield valve, and a manual or TRV valve is required, for each new radiator.

Q: Do thermostatic radiator valves save energy?

A: This will enable the valves to heat your home in an energy efficient manner, and not waste heat on empty rooms. In fact, the use of TRVs has been linked to energy savings as significant as 40%.

Q: Should both radiator valves be open?

A: Both valves should be turned fully open (anti-clockwise) so that the water can flow freely through the radiator. The lockshield valve normally has a plastic cover over it and controls the flow of the water into the radiator.

Q: Do you have to drain system to change thermostatic radiator valve?

A: Before you can start removing your radiator valves you'll first need to remove all water from your central heating system. Although some people claim you don't need to do this, it's always a good idea as it can prevent any water leakage should something go wrong.

Q: How do you control a radiator without a thermostatic valve?

A: Turning off a radiator without a thermostatic valve is exactly the same method as with a TRV. Find the valve on the opposite side of the lockshield valve. This is known as a manual valve. Twist the manual valve clockwise until it doesn't turn any further.

Q: Should the pin on a thermostatic radiator valve be up or down?

A: The pin can move up and down within the valve, which in turn allows water into your radiator. In addition, the pin will have a rubber or a copper taper on it. If the pin is pushed down, there will be no water going into the radiator, but if it's lifted up slightly, water will be flowing into the rad.

Q: Do thermostatic radiator valves go on flow or return?

Q: How do you use a thermostatic radiator valve?

A: All you need to do is turn the dial on the TRV in each room so it is only as warm as you want it. This greater control over your heating can help reduce the amount of energy you use, which can in turn save money.

Q: How accurate are thermostatic radiator valves?

A: The TRV will then take a temperature reading from the thermostat, and not the radiator. As such, it is more accurate than a conventional TRV, and is not affected by its surroundings; such as curtains near the radiator or direct sunlight.

Q: What is the difference between radiator valve and thermostatic valves?

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Thermostatic Valve, Straight Thermostatic Radiator Valve, Thermostatic Head