Your Trusted Brass Relief Valve Manufacturer

D&R Metal Industry is your no.1 source of high-quality brass relief valves. We offer affordable price, international shipments, and flexible MOQ. Contact us!

  • The certified lead-free brass relief valve
  • Good performance and high workmanship
  • Exceptional quality ODM/OEM services
  • 15+ years of experience in manufacturing brass relief valve

Why D&R Metal Industry is a Reliable Brass Relief Valve Manufacturer

For over 15 years, we have manufactured only the best quality brass relief valves. In fact, lots of popular business firms and enterprises around the world have trusted D&R Metal Industry as their manufacturer of brass relief valves. We are also looking forward to working with you. D&R Metal Industry always pursues innovation and technology-based manufacturing techniques to give you excellent quality products. Contact us!

D&R Metal IndustryYour Professional Brass Relief Valve Manufacturer

Pilot Valve Relief

In producing Pilot Valve Relief, we always make sure to follow strict quality control procedures so you can guarantee the highest quality products.

API Relief Valve

API Relief Valves are specifically designed for protecting devices as well as equipment and personnel against overpressure.

Water Shut Off Main Relief Valve

All our Water Shut Off Main Relief Valves are certified by various international quality standards to ensure high quality.

Brass Full Open Safety Relief Valve

We used advanced technology to manufacture Brass Full Open Safety Relief Valve. We focus on quality so we can satisfy your demands.

Brass Air Pressure Relief Valve

D&R Metal Industry is a leading manufacturer and designer of Brass Air Pressure Relief Valve. These are custom-engineered to suit your applications.

Brass Water Heater Safety Relief Valve

These are integrated with NPT or BSP thread for selecting. All our Brass Water Heater Safety Relief Valve are manufactured with high-quality at a competitive price.

Features of Brass Relief Valve

Standard Thread
In order to comply with the different thread standards of different countries, D&R can produce threads for brass relief valves according to customer requirements in GB, ANSI, BS, DIN, ISO, etc.
Factory Strength
Our brass relief valve factory is reliable and located in Jiangbei District, Ningbo, covering an area of 5,000 square meters, with an annual production capacity of 2,000 tons, customers are welcome to visit our factory.
Hot Forging
Our brass relief valves will be process adapted to the size. For valve bodies up to DN50, they are generally produced using hot forged blanks, and for hot forged blanks above DN50, they are sand cast.
Quality Warranty
All your orders for brass relief valves will be covered by a one year warranty. If you require a longer warranty period, you can negotiate with us. We will be responsible for any quality problems with the product during the warranty period.

D&R Brass Relief Valve

D&R Metal Industry is a leading manufacturer that specializes in designing and producing a wide range of brass relief valves. All our brass relief valves are custom-engineered to fit a wide range of applications. Here in D&R Metal Industry, we always seek to produce innovative products.

D&R Metal Industry is also equipped with state-of-the-art facilities and modern technology that allow us to manufacture low-cost brass relief valve without sacrificing its quality. By providing responsiveness, innovations, and quality, we have gained a high level of customer satisfaction.

Brass Valve & Fitting Manufacturer

How We Manufacture Your Brass Relief Valve

cut material
We will choose the right brass material based on your order
test material
Material Testing
We will make strict testing on your Brass Relief Valve 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 Brass Relief Valve surface clean and smoothly.
CNC Machining
CNC machining is the most important process to ensure all detais are based on your order requirement.
brass plating
Brass Plating
we can make different plating according to your requirement, including the thickness,t he color, the plating material, the test standard
Brass Valves Assembly
We will assemble your Brass Relief Valve 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 Brass Relief Valve before packaging and shipping.

Rocket Your Business with D&R Brass Relief Valve

brass valve and fittings design

D&R Metal Industry – Reliable Brass Relief Valve Manufacturer in China

D&R Metal Industry is a top Chinese manufacturer of brass relief valves. All our brass relief valves are specifically designed to protect machines, equipment, piping, and personnel from the overpressure discharge of gases, plant components, etc.

D&R brass relief valves are integrated with explosion-proof properties. These are precisely manufactured to operate within a wide range of pressure. It is also ideal for an application that has a temperature ranging from -60° C up to +270°C.

Brass Relief Valves Inspection

Aside from that, our brass relief valves are also manufactured with orientation-dependent and compact structures for a vast connection option. D&R brass relief valves are normally manufactured using high-quality brass. However, we also manufacture according to your material selection.

D&R Metal Industry brass relief valve comes in different sizes, designs, and configurations. If you wish to personalize your orders of brass relief valves for your brand, you can send us your detailed specifications so we can work on it.

Due to its versatility, D&R brass relief valves are widely used in different applications like air compressors, HVACR, automotive, specialty gas, industrial furnace construction, hydrogen-powered vehicles, etc.

Brass Relief Valves Inspection

Moreover, all our brass relief valves are 100% tested before shipment for maximum safety. These are also certified by CE, RoHS, ISO, and more quality guidelines to ensure durability. Whether you are an importer, retailer, distributor, or engineer needing the highest quality brass relief valves, choose D&R Metal Industry as your manufacturer!

Brass Relief Valves Inspection

D&R Metal Industry is also equipped with state-of-the-art facilities and modern technology that allow us to manufacture low-cost brass relief valves without sacrificing their quality. D&R Metal Industry always pursues innovation and technology-based manufacturing techniques to give you excellent quality products.

Enquire now for your next brass relief valve orders!

Brass Relief Valve: The Complete FAQs Guide

If you’re planning to import a brass relief valve, you need to consider its factors and characteristics before you purchase.

This guide will help you find the best brass relief valves for your applications. You will also learn how it works.

Keep on reading!

What is A Brass Relief Valve?

A brass relief valve is also known as a brass pressure relief valve. It is a kind of safety valve that is applicable for limiting and controlling pressure. The pressure can create and build up a process upset, fire, and equipment or instrument failure. To relieve the pressure, it is necessary to allow pressurized fluid to flow out of the system.

Additionally, a brass relief valve is designed to defend pressure vessels by opening predetermined set pressure. This brass relief valve is the “least resistance path” when there is a set pressure. When the fluid portion is diverted, and the valve is forced open into the auxiliary route.

Brass Relief Valve
Brass Relief Valve

What Are the Types of Brass Relief Valve?

There are three types of brass relief valves. It is mainly pilot-operated, conventional spring-loaded, and balanced spring-loaded.

Pilot-Operated Brass Relief Valve

Self-actuated auxiliary relief valves control the primary relieving tool of the pilot-operated brass relief valve.

Conventional Spring-Loaded Brass Relief Valve

It can exceed the requirements for a reliable, simple system-actuated device. The conventional spring-loaded brass relief valve can provide overpressure protection.

The conventional spring-loaded brass relief valve consists of a nozzle or inlet, which mounts on pressurized systems. It also has a disc held to prevent flow and spring to accommodate the disc closed. Besides, it also has a bonnet or body that contains functional elements.

The conventional spring-loaded brass relief valve can be adjustable for varying pressure.

Spring-Loaded Relief Valve
Spring-Loaded Relief Valve

Balanced Spring-Loaded Brass Relief Valve

The balanced spring-loaded is also named as a flat piston or balanced bellows design. It is recommended when back pressure is irregular.

The pistons or bellows have an area of adequate pressure the same as the disc seat area. The vented bonnet is designed for pistons and bellows’ pressure area. It is to ensure that pistons and bellows will expose to atmospheric pressure.

Balanced Spring-Loaded Relief Valve
Balanced Spring-Loaded Relief Valve

What Are the Other Designs of Brass Relief Valve?

Safety Valve

It is a type of pressure relief valve. The safety valve is characterized by pop action and rapid opening. Also, it is actuated by the pressure of inlet static. There are two types of safety valves. It is a low-lift safety valve and a full-lift safety valve. Let’s define them.

  • Low-lift Safety Valve: The disc of this safety valve is lifted automatically. It determines the actual discharge area through the disc position.
  • Full-Lift Safety Valve: The disc of this safety valve is also lifted automatically. The disc position will not determine its actual discharge area.

Relief Valve

It works through inlet static pressure. The relief valve has a gradual lift that is proportional to the enlarge in pressure above opening pressure. It also has enclosed spring housing applicable for a closed discharge system. The relief valves are commonly suitable for liquid service.

Safety Relief Valve

The safety relief valve indicates pop action or rapid opening to the enlarged pressure above the opening pressure. However, it depends on the application. The safety relief valves are practical for either compressible fluid or liquid. There are two types of safety relief valves:

  • Conventional: It has a spring housing that vents to the valve’s discharge side. It has three operational characteristics like closing pressure, opening pressure, and relieving capacity. It directly affects through back pressure changes onto the valve.
  • Balanced: It incorporates the means of back pressure’s minimizing effect on the operational factors like closing pressure, opening pressure, and relieving capacity.

Power-Actuated Brass Relief Valve

It combines with an effective relieving tool. It is also controlled by the tools that require energy’s external source.

Temperature-Actuated Brass Relief Valve

It is actuated by internal or external pressure or temperature on the side of the inlet.

Vacuum Brass Relief Valve

The vacuum brass relief valve can admit fluids. Therefore, it prevents internal vacuum excess. The vacuum brass relief valve also prevents and recloses fluid flow after restoring normal conditions.

What Are the Standards, Codes, And Recommended Practices for Brass Relief Valve?

Codes and standards address the application and designs of the brass relief valve. The most recognized and commonly used are Pressure Vessel Code and ASME Boiler. They are called ASME codes.

Most standards and codes are voluntary. It means that it is accessible for use by users and manufacturers. It is also written into construction specifications and purchasing.

Most ASME codes are specific in Canada and the United States. Many provincial and state legislatures adopt it.

Additionally, the ASME Codes provide the rule of pressure vessels’ construction and design. Mainly, it covers nuclear vessels, fired vessels, and unfired vessels. It also covers additional subjects like nondestructive examination and welding.

DIN 3320 Standards for Brass Relief Valve

  • Working Pressure (Operating Pressure): It is a gauge that exists at normal working conditions.
  • Set Pressure: The pressure under the condition of valves that commence lifting.
  • Test Pressure: The pressure under a test stand condition.
  • Opening Pressure: A gauge pressure has sufficient lift to discharge the capacity of predetermined flowing.
  • Reseating Pressure: It is a gauge pressure that reclosed direct loaded-safety valve.
  • Build-Up Backpressure: It builds up by blowing the outlet side.
  • Superimposed Pressure: The closed valve’s outlet side.
  • Backpressure: The gauge pressure that builds up during blowing on the side of the outlet (superimposed backpressure + built-up backpressure).
  • Accumulation: The increased pressure above the maximum. It allows protecting the system through working gauge pressure.
  • Opening Pressure Difference: The pressure increases over the pressure set. It is essential for lifting to allow the capacity of a predetermined flow.
  • Reseating Pressure Difference: The difference between reseating pressure and set pressure.
  • Functional Pressure Difference: The sum of reseating pressure difference and opening pressure difference.
  • Operating Pressure Difference: The pressure difference of working pressure and set pressure.
  • Lift: The disc’s travel away from closed positions.
  • Opening (Commencement of Lift): The disc’s first measurable movement or the discharge noise perception.
  • Flow Area: The body seat’s cross-sectional area downstream or upstream from the minimum diameter. It is used to calculate the capacity of flow without any obstruction deduction.
  • Flow Diameter: The body seat’s minimum geometrical diameter downstream or upstream.
  • Nominal Size Designation: The nominal inlet size of a safety valve.
  • Theoretical Flowing Capacity: The sum of mass flow from an orifice. It has a cross-sectional area that is equal to the safety valve’s flow area.
  • Actual Flowing Capacity: It is determined by measurement.
  • Certified Flowing Capacity: The actual flowing capacity reduces 10%.
  • Coefficient of Discharge: The actual ratio to the capacity of theoretical discharge.

What is the Application of Brass Relief Valve?

The application of brass relief valves is expected in the hydraulic system. It limits the pressure of the system to an individual set level. The brass relief valves will respond when the set level has been reached. It also feeds the excessive flow from the device back to the tank.

What Are the Uses of Brass Relief Valve?

The brass relief valves can control system pressure. It is commonly used in a compressed air system or fluid. This type of valve is proportionally open to the system pressure. When the valve is slightly overpressure, the system will not all the way open.

What Are the Basic Types of Brass Relief Valve?

There are two types of brass relief valves. It is a one-time and automatic relief valve.

Relief Valve Vs. Safety Valve

Both valves refer to release pressures. However, they have different technical definitions. The relief valve is a valve within a system of pressurized. It is designed to control the pressure for the system’s optimal functionality. It also helps the facility to prevent system failure and keep protected from overpressure conditions.

On the other hand, the safety valve is a valve that protects property, people, and processes. The safety valves refer to the last resort, the failsafe valve, which releases pressure. It can avoid catastrophe in the event of all other failure relief valves.

Relief Valve Vs. Safety Valve

Brass Relief Valve in A Well Pump Application

The damaged well pump water pressure is resulting in a water supply system’s high pressure. If that is the case, the brass relief valve is highly recommended for all water supply systems of the building.

Does A Brass Relief Valve Fail?

If your brass relief valve is not yet released and the system surpasses pressure, it is most likely a failure of the relief valve. The brass relief valve will stick caused by contaminants like sludge, dirt, rust, lint, and valve misalignment.

Brass Relief Valve
Failure of Brass Relief Valve

How Will I Know If My Brass Relief Valve is Fail?

There are three signs of a failed brass relief valve.

1. The System Can’t Reach the Pressure

It is a sign of failed brass relief valve if your system will not be reaching pressure. However, it can be fixed. It would be best if you calibrated it to the proper set pressure.

2. Over Maximum Pressure System

Safety relief valves and pressure relief valves can make your facility safe. But if your system is not yet released and surpassing pressure, it is a sign of failed relief valves. If that’s the case, you need to ensure that your valves are set to the proper pressure. Misalignment of valves and contaminants like sludge, dirt, rust, and lint can cause the relief valve to stick.

3. The Brass Relief Valve Has Leaking

This sign is detectable if you will inspect your relief valves. It is really a problem when your relief valve has leaked. It can come up with less, slower production. It is challenging to determine, especially when the entire system has a much more minor leak. At this point, you need to have preventative valve maintenance and testing.

Does Malfunction Brass Relief Valve is Always A Sign of Failure?

A malfunctioning brass relief valve is not always a sign of failure valves. A properly maintain relief valve will last up to three decades.

What Is the Right Set Pressure of Brass Relief Valve?

The brass relief valves must be set at least ten percent or 15-PSIG. If any is greater, the distinction must be at least ten percent over 25-PSIG or maximum operating pressure. However, it is applicable when there are unstable process conditions.

What is the Cause of Brass Relief Valve Leaking?

The brass relief valve will start leaking if your valve is triggered to open. It is because pressure or temperature exist, or your relief valve is faulty. If a defective valve is a problem, then it is an actual leak.

What Are the Factors to Consider When Choosing Brass Relief Valve?

There are six common factors you need to consider when sizing and selecting brass relief valves:

  1. Type and connection size. The relief valve needs to keep in touch with the inlet size.
  2. PSIG (Set Pressure)
  3. Temperature
  4. Service
  5. Back Pressure
  6. Required Capacity

What is the Effect of Failed Brass Relief Valve?

The relief valve in the oil pump can fail in either a closed or open position. At this point, it can cause engine damage and engine oil filter damage. The open relief valve can result in bleeding off too much oil. If that is the case, your engine mislays a considerable amount of pressure and oil drops.

What is the Difference Between Pressure Relief Valves and Relief Valves?

The PSV or pressure relief valve refers to simply safety valves. They relieve pressure from operating gases equipment. The PSV is generally open suddenly. Additionally, the PSV refers to as Relief Valves.

Brass Relief Valve – How It Works?

The brass relief valve can reduce work port pressure. It can provide pressurized fluid to the tank. Combining with energy, backpressure, and load pressure, the brass relief valve will experience pressure rise.

What is the Capacity of Brass Relief Valve?

The brass relief valve must relieve the connected compressor’s capacity at operating pressure.

What Are the Symptoms of Bad Brass Relief Valve?

Five symptoms indicate your brass relief valve is going bad:

  1. Fluctuating or low water pressure
  2. No water pressures
  3. Vibrating noises or hammering
  4. Flower bed leak
  5. High water pressure

How Many Times Do I Replace My Brass Relief Valves?

You can replace brass relief valves every four to five years. Replacing your valve can prevent age problems.

When I Replace My Brass Relief Valve?

99% of brass relief valve failure is the result of re-installation or installation issues. Failed relief valves can conduct explosions. Disrupted word flow, damaged equipment, and injury may result. You can replace your valve when you notice the signs of failure brass relief valve.

How Can I Test My Brass Relief Valve?

Failed brass relief valve caused by malfunction or age can lead to cash. It is essential to test your brass relief valve every six months. It is to fix and troubleshoot issues. However, there are stricter standard requirements in your local that you need to check.

You can follow the four steps on testing your brass relief valves for functionality:

  1. Lower and raise the lever test many times. You need to ensure that the water will out and flow to the line.
  2. To stop the leak, you can turn down pressure. Increase the pressure and replace the lever test.
  3. The pipe must be rust, mineral salt, and corrosion-free.
  4. Now is the time to replace your valve when the tests are failed.

Brass Relief Valves – Replace or Repair?

Repairing relief valves is much expensive than replacing them. However, it depends on the number and size of your brass relief valve that needs to replace, maintained, and repaired.

How Will I Know If My Brass Relief Valves Need to Replace?

There are five solutions to tell that your valves need to replace:

  1. Valve Age: Aged valves can result in losing spring tension in the diaphragm. That’s is why you need to replace it every four to five years.
  2. Geographic Location
  3. Usage: the amount of your relief valves conducts the tear and wear.
  4. Water Pressure: If your water is trickery comes out instead of rush, maybe there’s blocked debris. At this point, you can clean the re-test or clean the pipes. If you notice that there is still low water pressure, it’s time to replace it.

How Much Does Brass Relief Valve Cost?

The price of a brass relief valve starts at around 50 dollars. A brand-new brass relief valves installed by expert plumbers exceed around 350 dollars. If you’re about DIY-type or hands-on, then you can buy one, and you can install it by yourself.

Where Can I Find Brass Relief Valve Replacements?

When looking for brass relief valve replacement, make sure to find the best part on Chinese markets.

D&R Industry has the best brass relief valve that matches your company or individual needs.

We can also make custom brass relief valves to fit your applications.

Contact us right away!

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