Blending Valve Manufacturer

Your Professional Blending Valve Manufacturer

D&R is the leading manufacturer of blending valves in China. D&R Metal Industry is committed to becoming a trusted blending valve partner for your expanding valve and fitting business. We are ready to respond to your blending valve requests and questions.

  • Over 15 years blending valves manufacturer
  • Customize blending valves according to your specification
  • Blending valves product testing to ensure quality 
  • Cost-effective blending valves

Why is D&R the Leading Manufacturer of Blending Valves?

D&R Metals is known for manufacturing and supplying high-quality blending valves. We have this improved product technology for the fast blending valves method. With the help of our experienced engineer and supplier, we’ll keep doing our best to provide you with the best blending valve for your business needs and demands. Even for planning to build a hardware business. Send us a message!

D&R Metal IndustryYour Expert in Blending Valve Manufacturing

Underfloor Heating Blending Valve

Underfloor heating blending valve from D&R Metal Industry provides excellent temperature control for underfloor heating systems. It can also be used in systems with up to 250 m² of floor space.

15mm Water Blending Valve

D&R Metal Industry offers a 15mm Water Blending Valve that is made of Chrome-plated brass and suitable for water. We made high-quality products at a reasonable cost.

Thermostatic Blending Valve

D&R thermostatic blending valve is non-failsafe and has an adjustable outlet temperature. It also has a female connection that is perfect for underfloor heating.

Mixing Water Blending Valve

D&R Mixing Water Blending Valve includes a temperature-adjustable tool in the cap, as well as flat-faced union connections for easy maintenance. You can customize the blending valve to meet your local requirements.

15mm Mixing Blending Valve

D&R Metal Industry has been producing 15mm Mixing Blending Valve for over 15 years. We provide services that help you promote your business.

Hot Cold Blending Valve

It is suitable for use in the bathroom, washroom, kitchen, laundry, and other areas. In order to prevent scalding of public users, a hot/cold blending valve should be installed in public places.

D&R Blending Valves

D&R can create the best sort of blending valves for you. We have a big selection of blending valves so you can find the one that’s right for you. D&R blending valve allows you to keep your water at a temperature high enough to kill bacteria while still allowing everyone in the house to use it safely. Because the materials utilized are of the greatest quality, we are confident that you will not be disappointed.

Whether you have a plan in place to purchase blending valves for your business, please do not hesitate to contact us if you have any questions about our bending valves. We are so delighted to open up to you in detail.

Brass Valve & Fitting Manufacturer

How We Manufacture Your Blending Valves

cut material
We will choose the right brass material based on your order
test material
Material Testing
We will make strict testing on your Blending Valves material, after the material is ok, then we will arrange the material cutting
brass forging
Forging process can ensure the right shape based on your order requirement
sand blasting
Sand Blasting
Sand Blasting will make your Blending Valves surface clean and smoothly.
CNC Machining
CNC machining is the most important process to ensure all details are based on your order requirement.
Blending Valves Assembly
We will assemble your Blending Valves from different parts, you will see the final valves after this process.
water pressure testing
Water Pressure Testing
We make 100% air pressure testing on each of your Blending Valves before packaging and shipping.
brass plating
Brass Plating
We can make different plating according to your requirement, including the thickness, the color, the plating material, the test standard

Rocket Your Business with D&R Blending Valves

brass valve and fittings design

D&R Metal Industry – Your Worthy Blending Valve Manufacturer in China

D&R is the most reputable industry in China when it comes to hardware supplies. We are also known as the best supplier of blending valves across the country. We receive excellent feedback from our clients for their satisfaction with our services.

We commit our enviable situation to offer eternal and unrivaled service to our clients. We spent a lot of time and effort developing the most well-known blending valves devices perfect for your evolving business operations. The D & R Metal Industry will always be able to supply you with the blending valves you desire.

Blending Valve

D&R blending valves are nothing more than a piece of equipment attached to the water heater cylinder that blends a small amount of cold water with the hot water from the heat exchanger in your tank on its way out into the pipes in your home. It blends cold water and hot water, thus the name. One of the most important blending valves is for safety. Scalding water can inflict serious burns, but a blending valve lowers the water’s temperature to a safe level. This is especially crucial in households with little children, who are more sensitive to high temperatures. Also, Bacteria love to breed and thrive in the cylinder of your water heater. To avoid this, the water must be held at a high temperature, one that is too hot for your home’s safety. A mixing valve allows you to keep your water at a temperature that is high enough to kill bacteria while still allowing everyone in the house to use it safely.

D&R Metal Industry is equipped with professional engineers for constructing the blending valves. D&R can provide you with outstanding service. We are a certified manufacturer of blending valves. 

Blending Valve

D&R Metal Industry has been in business for over 15 years and is dedicated to fulfilling your needs. We have a team of experts with years of experience dealing with your specific blending valve needs. Even for enormous transactions, we never compromised on quality. We can provide you with a free sample to check the quality.

Request a quote for your next blending valve project!

Blending Valve: The Ultimate FAQ Guide

A compatible type of blending valve for your specific applications can achieve your desired results. 

Do you want to know more about the blending valves?

This Frequently Asked Questions(FAQ) Guide surely helps you choose the most compatible blending valve for any of your applications. 

Learn the functions, advantages, comparisons, installation, and many other points about blending valve.

What is Blending Valve?

Blending Valve

The blending valve handles the water temperature to where hot water is used, including bathtubs, sinks, or showers. 

The said valve can be controlled separately by a rotating dial unit.

Controlling the valve unit can regulate the temperature up and down according to your usage.

How Does Blending Valve Work?

Blending Valve Works

The blending valve’s work is to blend hot water and cold water.

Blending valves help in releasing the correct temperature of the water, thus preventing scorching.

Moreover, the blending valve prevents thermal shock situations.

The blending valve illuminates some bacterias.

How to Determine if Blending Valves are Bad?

Do the following steps to know the blending valves are failing:

  1. When the handle is hard to turns
  2. If the shower release only a hot or cold water
  3. Leaky faucet
  4. Low pressure of water

Is a Blending Valve Important?

Blending valves are often used in different plumbing industries.

The blending valve is very useful in producing a safe water temperature.

What Are Typical Applications of Blending Valves?

A blending valve is designed to meet various applications such as:

  • Showers
  • Tubs
  • Sinks
  • Hospitals
  • Nursing homes
  • Restaurants
  • Hotels

Are Blending Valves Easy to Install?

You can install a blending valve yourself, but you can ask a professional plumber for help if you are unsure.

Installing a blending valve is very simple. It will take a few minutes.

How To Install Blending Valves?

Follow the following steps to install the blending valve properly:

  • All power must be switched off
  • Close the cold and hot valves
  • Choose the suitable blending valve’s size
  • Prepare important tools used to install blending valve
  • Ensure all connections are right
  • Check for any leaks

How Long Does the Blending Valve Last?

The blending valve has a long lifespan.

 If the blending valves are installed and maintained properly, they can sustain for many years.

Blending valves can serve up to 5 years and more.

Can Blending Valves Adjust Water Temperature?

Blending valves are capable of adjusting a water temperature. 

This device can adjust from 35 to 60 degrees celsius of water temperature.

Are Blending Valves Expensive?

The blending valves are not so expensive compared with other mixing valves.

The blending valve’s price will depend on the sizes and their designs.

Since blending valves are easy to install, the total cost of blending valve installation is affordable.

How Do You Adjust a Blending Valve?

  • Remove the plastic cap on the valve
  • Adjust with a close-fitting spanner
  • Turn counterclockwise to heighten the temperature
  • Move to a clockwise direction to decrease the temperature
  • Set the valve to maximum blend water temperature
  • To prevent tampering, replace the cap

What are the Benefits of Blending Valves?

Prevents Scalding

Using blending valves allows the user to choose their preferred water temperature. 

You can set the valve in various levels of temperature to prevent scalding.

Prevents Thermal Shock

The blending valve prevents sudden blasts or changes in water temperature.

A sudden change in water temperature causes thermal shock.

Avoids Legionella

Installing blending valves protects users from bacteria that cause legionella disease.

Unlike cold water from a heater, blending valves are not vulnerable to growing bacteria.

Prevents Uncertain Water Temperature

Using a blending valve prevents the uncertain water temperature from coming out with the faucet. 

The blending valve helps achieve your preferred water temperature.

Efficient Safety Features

The blending valve can cut off the water supply when the water temperature gets hotter than you set.

This valve assures safe usage, especially for the elderly or children.

No Major Changes Needed

The easy way of installing a blending valve cannot cause property damages. Even in plumbing, there’s no need to dig the tiles and walls.

Upgrade Home Resale Cost

Effective home blending valve installation, especially in the bathroom, makes your selling house at a reasonable price. 

Installing blending valves is the perfect thing you can upgrade your selling house.

It enhances comfort and security.

Are Blending Valves Required?

Installing blending valves is not mandatory in plumbing codes.

But having blending valves is excellent practice for a consistent hot/cold water supply temperature. 

How Do You Test a Blending Valve?

Various types of blending valves have different testing procedures. Below are some basic steps on testing a blending valve:

  • Evaluate the mixed water temperature
  • Separate the cold water supply to the blending valve
  • Stand by in five seconds
  • Let the water temperature reaches below 46ᵒC
  • The valve will ideally operate if there are no temperature changes
  • But if it exceeds about 2ᵒC, the valve isn’t working
  • Conduct full in-service test if needed

Which Way Do You Turn a Blending Valve for Hotter Water?

Turning the blending valve counterclockwise, carry out hotter water. 

The hot water temperature enters the blending valve’s right side.

What are the Main Components of a Blending Valve?

Blending Valve Parts

  • Thermostatic Element

This component expands and contracts the water temperatures. A thermoplastic element moves the piston up or down whenever there are temperature changes.

  • Piston

The blending valve piston moves based on a thermoplastic element sensor. 

It shuts off quickly the water flow in case of water failure regulation.

  • Return Spring

The return spring pushes the piston back to its original position after thermoplastic element operation. 

  • Temperature Adjuster

The temperature adjuster is the component that adjusts the piston’s position.

This component is located under the blending valve shield lock.

What Happens When a Blending Valve Fails?

There will be a hot or cold water cross-over.

If the cross-over happens, the water will not be hot enough as you desire.

Can a Blending Valve be Installed Upside Down?

The blending valve can be installed in any position, such as upside-down or sideways.

Do I Need a Blending Valve On My Water Heater?

A blending valve is vital to your water heater.

It helps control the water temperature and avoid scalding.

With a blending valve, the water temperature increases to kill off bacteria.

This valve also blends both hot and cold water.

Does a Blending Valve Save Money?

Installing blending valves is one of many ways you can save money.

The saving would be increased if the users were more conservative.

Can You Pump Into a Blending Valve?

No, not into it. Pumping away is the best practice instead. 

Pumping into a blending valve stops the cold water from entering the cold inlet port. 

It causes entering hot water through the blending valve to the cold inlet piping. 

Where is the Blending Valve Located?

The blending valve is located behind the wall and indelibly attached to the plumbing. 

What is a Blending Valve for Shower?

A blending valve mixed the cold and hot water.

This valve functions to deliver safe showering temperatures.

How to Repair a Leaking Blending Valve?

To repair a leaking blending valve, you must use proper tools and materials, including replacement cartridges, pliers, and standard screwdrivers.

To Repair:

  • Turn off the water supply

Turn off the main water supply at the stop tap. 

  • Open the mixer tap and run out excess water.

Wait to trickle out the excess water and start repairing.

  • Remove the cover under the handle.

Pop off the cover using a flathead screwdriver.

  • Unscrew the small internal screw

For unscrewing, you can also use a small flathead screwdriver.

  • Remove the handle of the tap.

Gradually ease it off.

  • Take off a cover plate or chrome dress ring.

Some blending valve has no cover plate, but if there is, better take it off.

  • Using a plier, unscrew the retaining nut.

The retaining nut holds the cartridge. When you remove it, the water naturally comes out.

  • Withdraw the cartridge from the wall and get the replacement

Gently remove the cartridge and make sure your replacement matches.

  • Place the new cartridge.

Line up the cartridge pin to the parts in the wall.

  • Reassemble the valve

Reassemble the valve parts in the reverse order you disassemble them. 

  • Restore water supply

Turn back the supply of hot or cold water and enjoy the shower.

What Causes the Blending Valve to Fail?

The leading cause of the blending valve failure is the temperature changes. 

It happens when the valve is blocked or moved out of location.

There may be a problem with the O-ring or in the thermostatic element.

There is also the possibility of having water pressure or flow issues.

 What is the Main Function of a Blending Valve?

A blending valve keeps enough high temperatures to eliminate the bacteria and ensure your hot water is safe.

What Temperature Should a Blending Valve be Set?

The factory-set water temperature and the suggested is about 120 F. 

If you set it 120 F, it takes almost 5 mins for 2nd and 3rd-degree burn. 

What are the Types of Hot Water Mixing Valves?

There are various types of mixing valves that are installed in any application. The classes include hydraulically, 3-way, and 4-way motorized mixing valves and thermostatic or blending valves.

  • Hydraulically Operated

This blending valve requires manual operation. 

It cannot be controlled automatically. 

Hydraulically operated valve is usually made up of brass for corrosion resistance.

  • Thermostatic Mixing Valves

A TMV is a mixing valve that regulates temperature by blending hot and cold water.

  • 3-Way Motorized Mixing Valves

This valve is designed with three ports for hot, cold, and mixed water.

It also functions as the self-adjusting valve.

  • 4-Way Motorized Mixing Valves

This valve is formed with four ports. This motorized valve has a portion where the cold water enters with a mixed part of hot water.  


The blending valve is a piece of equipment that connects to the water heater cylinder.

This type of valve blends a small measure of cold water into the hot water to the pipes.

Choose the most suitable type of blending valve for your particular applications. 

We hope this article helps you decide and gives more ideas about how the blend valve works. 

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