Professional Brass Check Valve Manufacturer

D&R Metal Industry – Your Leading Manufacturer of Brass Check Valve

All our brass check valves are manufactured using the best quality and 100% solid brass materials. We make sure that your brass check valve orders are 100% tested and inspected so you can guarantee that you purchase the best quality.

Our brass check valves are integrated with threaded connections. You can choose NPT or BSP thread according to your applications. Male and female brass check valves are both available at D&R Metal Industry. More to that, it can work under -20°C up to 100°C temperature range.

Aside from that, D&R Metal Industry also manufactures brass check valves with high durability and high performance. It also features corrosion resistance for longer life service. Due to their optimized quality, our brass check valves are widely used in domestic water services, compressed air systems, air-conditioning systems, and heating systems.

D&R Metal Industry always conforms to international guidelines and standards for quality. Thus, you can guarantee that you purchase the best quality brass check valves. We also offer low MOQ to support your business or projects.

Inquire now for your next brass check valve orders!

Brass Check Valve: The Ultimate Guide

Brass is an alloy made of zinc and copper hence the numerous applications.

But not everyone knows what a brass check valve is and its functions.

That’s why it is important to read through this article, where you will get the answer to most questions you have about brass check valves.

Moreover, you will also learn about the different kinds of check valves and how they function.

Common Applications of Brass Check Valve

Horizontal brass check valve

Brass check valves have various applications both domestically and industrially.

Listed below are the standard ways the brass check valves can be helpful in your home or firm:

• It is used in the pump and compressor outlets to prevent the media’s backflow into the equipment. This is necessary for big facilities to avoid unnecessary accidents.
• It is also vital to install check valves in piping systems to help regulate the pipes’ pressure. The valve operates automatically in the direction of the flow.

If a pressure surge exceeds the system’s pressure, the valve flaps open to allow the fluid to pass.

Consequently, reducing the fluid’s (liquid or gas) pressure in the opposite direction of the flow.

• Additionally, check valves help prevent the backflow of less viscous fluids with no solid particles.

Thus, they are mainly used in industrial water and gas pipes.

With viscous fluids and solid particles as the medium, it can be hard to prevent a backflow that may cause damage.

• You can fit brass check valves in injectors that supply steam boilers with water to prevent backflow.
• Moreover, metering pumps also have brass ball check valves in both the inlet and outlets.
• Another usage of brass check valves is in water pumps supplying water to water slides.
• Chemical and power plants such as nuclear power plants have check valves fitted in their feedwater control system, dump lines, N2 systems, and monitoring systems.
• Domestically, check valves are inserted in lawn sprinklers and washing machines to prevent contaminated water’s backflow into the domestic water supply.

Benefits of Brass Check Valve

Any check valve’s principal function is to ensure no backflow of fluids in the piping, preventing any leakages and overflows.

Below are specific benefits of the brass check valves:

• Compared to steel and carbon steel, brass is corrosion resistant and hence can last for a long.
• It is also easy to machine a brass check valve.
• The affordability of brass as raw material makes brass check valves more affordable than other check valves.
• The functionality of the brass check valve does not require power to operate; hence can perform without being controlled after insertion in pipes.
• Brass check valves perform as backup and safety systems.
• They can also be used both horizontally and vertically.
• Brass check valves are always automated hence efficient.
• Protect the pumps and compressors from damages that the backflows may cause within the systems.
• Low maintenance costs characterize brass check valves.

Types of Brass Check Valves in the Market

A variety of options is key if you are looking to get value for your money.

Lucky for you, we have various brass check valves that differ in terms of performance and functionality.

Our experts in brass check valves will provide you with various recommendations depending on your needs.

Below are some of the types of brass check valves we offer:

Brass  Ball Check Valve

This type of check valve uses a ball that is either free or spring-loaded.

The ball freely moves to prevent or allow flow depending on the pressure.

If the pressure in the inlet is greater, the ball is dislodged, allowing for free flow.

In a case where the opposite applies, the ball moves back, preventing any flow back.

Brass ball check valve

 A ball check valve in action

Brass ball check valves are useful in controlling both liquid and gaseous flow making them the most common.

Brass Swing Check Valves

These check valves function by using a hinged disc that swings to either open or shut the inlet.

For this reason, swing check valves are commonly referred to as ‘tilting disc check valves.

When the pressure outside the inlet is high, the disc opens.

As the outside pressure reduces, the disc shuts, thus preventing any backflow.

 Brass swing check valve

Brass Foot Check Valves

It is a valve with a filter on the inlet side that prevents debris that may lead to clogging in the piping.

Additionally, they are fitted with a ball check valve to prevent any backflow.

Majorly, they are useful in places where the pump is above the suction line such as water wells or fuel tank suction pipes.

They prevent debris from getting into the piping system while preventing any backward siphoning of liquids.

Brass foot check valve

Brass Diaphragm Check Valves

These types of check valves have an elastic diaphragm that acts as the regulatory mechanism.

As the inlet pressure increases, the diaphragm flexes open, allowing fluid flow.

As the inlet pressure reduces, the diaphragm regains its original posture consequently, closing the orifice.

 Brass Diaphragm Check Valves

Spring Loaded Brass Check Valve

These comprise a disc fitted with a spring.

When the inlet pressure overcomes the spring force, the disc is forced open, allowing for flow.

As the inlet pressure drops, the backward fluid pressure and the spring force push back the disc closing the orifice.

Spring Loaded Brass Check Valve

Main Components of Brass Check Valve

The variation of check valves makes it essential to know their various components to understand how the different check valves function.

Check valves are two-port valves with two openings on the valve body.

The first opening is the inlet port which lets in the fluid (liquid or gas) into the valve.

The other opening is the exit port which, as the name suggests, is an exit point of the fluid from the valve.

The valve has got other parts that play a significant role in the prevention of backflows in these piping systems.

The primary and central parts of a check valve are the:

• Body
• Seat
• Disc
• Cover

However, depending on the purpose and the design, some add-ons such as springs, balls, stems, and other basic components can be added to the brass check valve.

How Brass Check Valve Works

Working on the check valve

After you have understood the construction and the various parts of a brass check valve, it is easier to discuss how it operates in the piping systems.

Also, different types of check valves function differently depending on their purpose and their design.

For instance, swing, spring, and diaphragm check valves work differently but use the same mechanism.

Basically, the inlets and the outlets of the check valves work to ensure that there is no backflow of fluid.

Since they only allow the fluid to flow in one direction, they are referred to as one-way valves or non-return valves.

A brass check valve relies on a pressure differential for it to work.

The input pressure should be higher than the output pressure, which facilitates the opening of the valve.

If the pressure on the output opening is higher than the pressure on the input side, or the input side’s pressure is not high enough, the valve will remain closed.

The closure mechanism, though, depends on the valve type.

But still, unlike other valves, the brass check valves do not need a handle or human assistance for them to function efficiently.

Difference between Brass Ball Valve, Brass Gate Valve, and Brass Check Valve

Different valves work differently because of the designs they come in and the purposes they serve.

So is with the brass ball, brass gate, and brass check valves. Although, there is not so much of a difference.

Brass Ball Valve

 Brass ball valve

The brass ball valve is mostly used domestically.

However, it can also be used for low-corrosive industrial fluids.

To function, you have to turn the handle to align with the pipe.

This rotates the rotary ball, in turn allowing the fluid to pass.

Brass Gate Valves

Brass gate valve

On the other hand, unlike other valves, the brass gate valve is not good at regulating the flow of fluids in a piping system since it has to be operated manually for it to function effectively.

It overshadows ball valves in larger industrial applications because of the mechanical advantage a threaded stem offers.

Brass Check Valves

The brass check valve is a different kind of safety device that solely ensures the fluids in a system flow in only one direction.

It uses the pressure differential principle to operate efficiently.

Unlike the other two valves, they do not need a handle, actuator, lever, or human assistance to function.

The brass check valves are used majorly to control backflow issues apart from passing fluids among the three valves.

The other two, brass ball and brass gate valves, regulate the number of fluids being passed.

How Brass Ball Valve Compare to a Brass Ball Check Valve

A similarity between the two is that they use a ball to carry out the purpose. However, the balls’ structures and how they function differently.

For the brass ball valve, the rotary ball has a bore at the center for passing fluids.

The ball is opened by turning the handle to a position that is aligned with the pipe.

Conversely, a brass ball check valve has an entirely wholesome ball (having no bore).

The ball is either pushed forward or backward depending on the fluid pressure.

Also, the ball can be fitted with a spring to boost functionality.

How Brass Spring Check Valve and Brass Swing Check Valve compare

The brass swing check valve is a simple full port design with an unguided disc that moves in a fully open position.

When pressure from the fluid is applied and closes when the cracking pressure reduces.

On the other hand, a brass spring check valve is easy to understand and install.

Due to their durability and reliability, they have become the commonly used check valves.

When the inlet pressure is higher than the cracking pressure, the disk is pushed to open, and overcoming the spring strength; the fluid flows through.

When the pressure drops, and there is backflow, the spring closes the disc.

Composition of Brass Check Valve Material

As you have guessed from the name, a brass ball check valve has brass as its major material.

Brass is an alloy made of a mixture of zinc and copper, which gives it its unique qualities.

However, it would help to note that the body’s material does not have to be similar to that used on the valve seat or disc but entirely depends on the service.

How Stainless Check Valve compare to a Brass Check Valve

Even though these check valves fulfill a similar purpose, to ensure the flow of fluid in one direction, their designs and specific purposes make them slightly different.

For instance, the stainless check valve is known to have superior corrosion resistance, heat resistance, and excellent mechanical properties.

Which is why it is preferred in chemical applications.

On the other hand, the brass check valve is used for low and medium-pressure applications, which majorly pass air, water, oil, or fuels.

However, it is not resistant to seawater or chlorinated water, unlike the stainless check valve.

Moreover, brass check valves are less resistant to heat and corrosion as compared to stainless steel.

Difference between Brass Check Valve and Back Flow Preventer

A brass check valve is a safety device that is designed to allow fluids that are either liquid or gaseous to flow in one direction in the piping system.

This prevents any flow backs and leakages, which can lead to damage.

In contrast, a backflow preventer is a device that is designed to protect potable water supplies from contamination and pollution due to backflow.

 Backflow preventer

 Y-type brass check valve

Connection Options for Brass Check Valve

A brass check valve has openings that are to be attached to the piping system.

The openings have threads that allow for a tight connection between the pipe and the check valve.

The treads may differ, as shown in the pictures below.

From the two pictures, you can deduce two connections type.

For brass check valve 1, the pipe’s opening ought to have a larger diameter than the valve for it to fit.

This is known as the male-female connection.

For brass check valve 2, the pipe’s opening should have a smaller diameter than the valve for them to connect.

This connection type is referred to as the female-male connection.

How to identify Brass Check Valve Symbol

In piping diagrams, various valves are displayed on the drawing plan using multiple symbols.

This helps you to easily determine the position of the valves in the entire piping system.

All check valves are displayed using a similar symbol, be it brass, bronze, iron, or steel check valve.

However, the symbols may differ depending on the check valve’s design, such as the butterfly or diaphragm check valve.

Below are the common check valve symbols you are likely to encounter:

Valve symbols

How to Verify the Quality of Brass Check Valve

A quality check valve should;

• Be tested and inspected in all aspects such as pressure and temperature.
• Have 100% zero leakages.
• Be tested by a certified firm or company.

Quality Compliance Standards of Brass Check Valve

When it comes to testing standards, one standard does not fit all.

Each type of valve has its standards.

Some of the main standards in the industry are guided by:

• ANSI Valve Standards
• API Valve Standards
• ASME Valve Standards
• BS – British Standard Valves
• Chinese and International Valve Standards
• Chinese Valve Standards

These standards will vary depending on where you intend to use the brass check valves.

Here is a simple guide to valve standards.

Cost of Brass Check Valve

Brass check valves are commonly used for instance when doing plumbing in your home, most likely you will use this check valve.

By implication, it is considered cheaper as compared to other check valves.

However, the costs are different and vary from one type of brass check valve to another so it’s best to choose the one you can afford.

Besides, it should be effective in its functionality.

When to Repair vs Replace Brass Check Valve

Not all machinery or equipment can last forever, and at some point, they have to be checked for repair or replacement.

It is thus important that you inspect the brass check valve always to know when replacements or repairs are needed.

The check valve can sometimes result in malfunctions in the system which can result in serious damage if not managed on time.

In most cases, it is advisable that you do a routine check-up on the valve so that you can resolve any issues promptly

If any part of the brass check valve is entirely dysfunctional, then you will have to replace it.

However, most leakages are resolved through repair or tightening of the joints.

If you are not familiar with replacing and repairing the brass check valves, you can hire the services of a plumber, or a suited professional.

Importance of Digital Valve Positioner for Brass Check Valve

New and better ways of controlling and operating the valves are cropping up in a world characterized by never-ending technological advancements.

One such advancement is the digital valve positioner.

This device enhances pressure and flows control in piping systems.

It aids the check valve to accomplish its function by intercepting signals and transmitting them to the check valve.

The three major types of positioners are:

• Pneumatic positioner – Functions by receiving air (pneumatic) signals.
• Analog (electro-pneumatic) positioner – Functions by receiving electrical signals.
• Digital (Smart) positioner – Also receives electrical signals, but it is automated

The digital valve positioner has gained popularity with the automation of most industrial activities.

Some benefits of Digital Valve Positioner are as follows;

• Enhances better control valve reliability and performance.
• It has more calibration, which helps you get more accurate readings hence more control. An accurately calibrated digital valve positioner provides a high level of process control.
• Digital valve diagnostic is an advanced diagnostic for predictive maintenance. This is the biggest advantage of real digital valve positioners as opposed to analog ones.

They provide real-time data and diagnostics such as valve thrust and travel, temperatures, air consumption, and friction.

This helps you to identify and fix the performance problems before they can boom into emergencies.

• It is easy to set up digital valve positioners.

Available Sizes of Brass Check Valves

When you want to start a project or when installing pipes in your home, you must use the right size of valves.

Using the wrong size can result in leakages and overflows, which can cause severe damage to your piping system.

These damages are usually costly to deal with since you will have to replace the part/whole system or otherwise repair the valves.

Therefore, as a part of proper management, ensure you test the check valves and choose one(s) that will be a perfect fit with the pipes used.

Below are some of the standard and available sizes of the brass check valve;

 1/4″

 3/8″

 1/2″

 3/4″

 1″,

 1 1/4″

 1 1/2″

 2″

Maximum Operating Temperature for Brass Check Valves

The valves usually operate at minimum and maximum temperatures, which are affected by several factors.

In most cases, the internal material may differ from the one outside the check valve.

It would also help to know that different check valves have got different maximum operating temperatures.

For brass check valves, below are the temperature requirements:

• For water and air services, it ranges from 200⁰f to 300⁰F
• For steam, the maximum operating temperature ranges between 500⁰F to 550⁰

Maximum Initial Pressure that Brass Check Valves can regulate

The maximum initial pressure that the valve can regulate depends on the service. Below is a table to illustrate this:

Minimum and Maximum Outlet or Delivery Pressure Brass Check Valves can deliver

The minimum and maximum outlet pressure for check valves depend on the service body material.

Some may think that the design has a play in it, but that’s not so.

In brass check valves, the delivery pressures are as follows:

How to adjust the Pressure that Brass Check Valve delivers

If you want to increase the pressure delivered by the brass check valve, turn the adjusting crew clockwise.

With improved technology, you can use valve management software that involves pressing a button or adjusting using a technological device.

If you want to reduce the pressure to balance the flow, you can turn the adjusting screw anticlockwise or rather, use the valve management software.

Information you need to Specify when Purchasing a Brass Check Valve

When buying a brass check valve, there are certain things to look at, and the check valve must match these specifications.

Some of them include;

• Material compatibility with the medium. It can be either gas or liquid.
• Accessibility needs for inspection and repair.
• Connection size and type.
• You should check the operating temperatures.
• System pressure range.
• Inlet and outlet pressures.

This information is necessary for you to choose a suitable brass check valve for your intended applications.

Difference between Brass Check Valves vs. Iron and Bronze Check Valves

Bronze and brass check valves have the same abilities, such as corrosion resistance and the same machinability, except that brass check valves are less expensive than bronze.

On the other hand, iron check valves are primarily used for steam, water, oil, and gas applications and can endure a wide range of temperatures and pressure.

This excellent performance of iron makes it quite costly to purchase.

Common Causes of Brass Check Valve Failure and How to Correct them

There are and have been many check valve failures occurring in industrial systems.

These failures can always cause damages which can be costly for your to repair or restore.

Some of the causes of brass check valve failures are;

• If the valve is not fully closed because of dirt deposits and debris, its normal functioning will be altered.
• Damage to any part of the valve can result in failure. If the seat or seal of the valve is damaged, the valve will fail to perform its intended function.
• If the valve is not designed to close fully, then there is a likelihood of leakage. Some valves do not have a 100 percent closure, and therefore during throttling, they may not have excellent on-and-off capabilities.
• Using the wrong size of the check valve in the piping system. If you don’t use the right size when fixing your valves or a mismatch in the size of valve openings and that of the pipes, it is likely it will fail.
• Mishandling of the valves during installation can result in valve failure. When installing the check valve, you should ensure that you handle them with care, or else with time, the normal flow of the fluids will be interfered with.

However, these problems can always be corrected, and you can restore your check valve to perform its role effectively. Some of the ways of fixing these problems include:

• Perform regular testing on the valves to check for any damages that can cause check valve failure.
• Pick the correct size of brass check valve for your project.
• Ensure you hire professionals to handle your installations.
• Based on your project and service’s purpose, make sure you use valves that close 100%, which can regulate the pressure and prevent backflow.

Meaning of API 6D Testing for Brass Check Valves

A well-managed plant always tests the valves they want to use on its project.

Testing your check valves means you care about the environment’s safety, and you are interested in preventing damages and accidents.

This is the sole reason why the process is essential.

Therefore, if you have valves that you want to install ensure they have passed the API 6D test.

This is the standard that provides specifications for the brass ball and gate valves used on pipelines.

The API 6D testing is a mandatory requirement, and also, in case of accidents, the test records will be needed to assist in the inspection.

Recommended Safety Ratings for Brass Check Valves

In the rating of brass check valves, you need to consider;

• Fluid compatibility
• Flow characteristics
• Non-slam characteristics
• Cost of purchase

How to Select and Size Brass Check Valves

If you are doing a project that requires the brass check valve, you must choose the correct size, or else you will just be creating room for damage.

Damages can be costly and stressful to handle since they can result in accidents and the piping system’s failure.

Therefore, in choosing and sizing check valves, you should;

• Consider the types of brass check valves. There are various brass check valves you can choose from, such as swing brass check valves, spring brass check valves, and many others suitable for use in your project.
• Consider the opinions of experts. An expert will advise you on the best available check valves that can be effective in your firm, so their opinion is essential when sizing a check valve.
• Test the valves. Carry a sample of valves you’ve used before and the adjacent pipe you are to use to ensure you get the perfect fit. This can be done at the point of purchase of the brass check valve.

Mounting Orientation Options you can use to Install Brass Check Valves

When carrying out your project and installing brass check valves, you should consider the mounting orientation to use.

There are, however, practical options that you can use depending on your project and the medium/service.

The check valve can be mounted in two ways, either horizontally or vertically, depending on your project’s service and size.

For clarity, installing a brass check valve on a horizontal pipeline means the valve will be vertical, and installing a vertical pipeline means the brass check valve is horizontal.

I hope with this information, you can comfortably choose a suitable brass check valve for all your applications.

At D&R Metal, we specialize in giving you high-performance brass check valves in the industry.

In case you have any questions or inquiries about brass check valves – contact our engineers now.