Brass Safety Relief Valve

Parameters of Brass Safety Relief Valve

Pressure safety relief valves are typically used for controlling pressure on boilers in heating systems.

Additional information


Brass, CW617N, Lead-free brass


Sand blasted



Thread connection


Working pressure

1 bar, 3 bar, 6 bar



Lead time:

45 days


12 months

Details about Brass Safety Relief Valve

Brass Relief Safety Valve


  • Size: 1/2 “
  • Construction Material (Plumbing):  Brass
  • Operating Water Pressure: 1, 3, and 6 bar
  • Product Type: Temperature & Pressure Relief Valve
  • Temperature Range: -20°C-110 °C
  • BSP/NPT connection
  • Pressure safety relief valves are typically used to control pressure on boilers in heating systems, on stored hot water cylinders in domestic hot water systems, and generally in water systems.
  • When the calibrated pressure is reached, the valve opens and, using discharge to the atmosphere, prevents the pressure of the system from reaching levels that would be dangerous for the boiler and the components in the system itself.

The brass safety relief valve is a piece of equipment found in industrial settings. The valve has two functions: release pressure and protect against over-pressure situations. These valves are designed for steam, water, gas, or other liquids that may expand when removed from the pipe. They can be found on boilers and pressure vessels such as pipelines; they will often be placed at an elevation high enough above the ground so that a rupture won’t cause any damage. These valves have many features.

Brass Safety Relief Valve with DN15 NPT female inlet and 1/2″ male outlet. This is a great safety valve for water tanks. It has a 200 PSI pressure rating, making it perfect to work with your tank!

This product is designed to work for water tanks. It has a brass body, which makes it durable and sturdy. The safety relief valve helps prevent damage caused by excessive pressure build-up in the tank during use. It is easy to install and can be used with any water tank.

Pressure relieft safety valve applications
Pressure relief safety valve applications.


The Brass Safety Relief Valve is designed for use in water tanks, as it has a 2″ female NPT connection. The valve features a solid brass body and bonnet, which can withstand high temperatures of up to 200°F (93°C). This relief valve also features a 1/2″ male NPT connection that can be used with the discharge hose.

The Brass Safety Relief Valve should be installed on the bottom or side of your water tank. You will need to drill an opening in your tank to install this safety device.

Brass Safety Relief Valve is a type of safety valve that prevents the tank from over-pressurization. The brass safety relief valve has a spring-loaded poppet that opens when the pressure in the tank rises above a predetermined value. It can be installed on water tanks, boilers, and other pressure vessels.

1) Brass Safety Relief Valve is easy to install, without flanges or welding. It can be mounted in any position and does not require the pipework to seal off the rest of the system.

The Brass Safety Relief Valve is a safety device to prevent the over-pressurization of water tanks and piping. The valve closes when the pressure reaches a certain level, preventing damage to the equipment. It also prevents flooding and allows for easy maintenance by opening when needed. This brass relief valve is designed for hot and cold water and fire sprinkler systems. Operating at a temperature range of -40 to 180 degrees F, it can be used in residential or commercial settings.

Brass Safety Valve: An Essential Guide

Safety valves are critical components in various systems, ensuring that pressure within a container or system does not exceed predetermined levels. Among the materials used for manufacturing safety valves, brass stands out for its durability, corrosion resistance, and overall reliability. This guide delves into brass safety valves, discussing their mechanics, benefits, applications, and more.

Understanding the Brass Safety Valve

A brass safety valve is a pressure-relief device primarily designed to release excess pressure from a system, thus preventing potential malfunctions or catastrophic failures.

Mechanics of Operation:
The primary function of a safety valve is straightforward: when the pressure within a system surpasses a predetermined limit, the valve opens automatically, releasing the excess pressure. Once the pressure drops to a safe level, the valve closes. This operation ensures the system remains within safe operating limits.

Why Brass?
Brass, an alloy of copper and zinc, is renowned for its corrosion resistance, making it ideal for systems with moisture or corrosive materials. Its durability and longevity make it a preferred choice for safety valves, especially in systems that demand high reliability.

Key Features and Benefits

The brass safety valve offers several advantages:

Brass resists wear and tear, ensuring the valve remains operational over extended periods.

Corrosion Resistance:
Brass is less prone to rusting or corroding, which is essential for systems that come in contact with water or other potentially corrosive materials.

Thermal Conductivity:
Brass has good thermal conductivity, making it suitable for systems with varying temperature conditions.

While brass might seem expensive upfront, its durability and minimal maintenance requirements make it cost-effective in the long run.

Applications of Brass Safety Valves

safety valve system
safety valve system


Brass safety valves are versatile and find usage in various domains:

Domestic Systems:
Water heaters, boilers, and other household appliances that operate under pressure often incorporate brass safety valves to prevent over-pressurization.

Industrial Applications:
Factories, especially those in the chemical, petrochemical, and pharmaceutical sectors, use brass safety valves to safeguard their intricate systems.

Vehicles that operate using pressurized systems, like certain trains or industrial vehicles, may utilize brass safety valves as a safety measure.

Sizes of Brass Safety Valves:

Brass safety valves are available in various sizes to cater to domestic and industrial needs. The size usually refers to the inlet and outlet diameters of the valve.

  1. Micro Sizes: These typically range from 1/8″ to 1/4″. They’re used in smaller applications like certain household appliances or specific precision instruments.
  2. Standard Sizes: The more common sizes for domestic and some industrial applications range from 1/2″ up to 2″.
  3. Industrial Sizes: For larger systems or industrial applications, sizes can go from 2″ up to 6″ or even larger in some specialized cases.

Specifications of Brass Safety Valves:

When choosing a brass safety valve, one should consider various specifications. These could include:

  1. Pressure Rating: This refers to the maximum pressure the valve is designed to handle before it opens to relieve the excess. It’s usually measured in Pounds per Square Inch (PSI) or bar.
  2. Temperature Rating: These valves can handle a wide temperature range since brass has good thermal conductivity. The exact range would depend on the specific alloy and design of the valve.
  3. Flow Coefficient (Cv): This coefficient shows how much fluid can flow through the valve once fully open. A higher Cv means more flow.
  4. Connection Type: This could be threaded (NPT or BSP), flanged, or a compression type, depending on the application.
  5. Set Pressure: This is the predetermined pressure at which the valve will start to open.
  6. Blowdown: The difference between the set pressure and the pressure at which the valve reseats or closes.
  7. Material Composition: While the primary material is brass, the exact composition, like the percentage of copper and zinc or the addition of other elements, can vary.
  8. Seal Materials: Depending on the application, the internal seals of the valve might be made of materials like Teflon, Viton, or EPDM, which can handle different chemicals or temperatures.
  9. Certifications: Depending on the region and application, the valve might need to comply with specific standards or certifications.

Understanding the size and specifications is crucial when selecting a brass safety valve. It ensures the valve functions effectively in its intended application, providing safety measures while meeting operational requirements. Proper sizing and adherence to specifications ensure the longevity and efficient performance of the valve in any given system.

Maintenance and Care

While brass safety valves are known for their robustness, regular maintenance ensures their longevity:

Regular Inspections:
It’s advisable to periodically check the valve for any signs of wear or corrosion. Even though brass resists these issues, no material is entirely immune.

Pressure Tests:
Conducting routine pressure tests ensures the valve operates at its predetermined pressure levels.

Depending on the system, occasional cleaning might be necessary, especially if the system carries materials that can cause blockages.


Brass safety valves, with their combination of reliability, durability, and practicality, play a pivotal role in ensuring the safety of various systems. By understanding their function and importance, one can make informed decisions regarding installation and maintenance, ensuring systems remain safe and operational for years.

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Metals Vavles Works on Plumbing System

Plumberstar valve fabricator in China. Our main parts for heating pipelines and intelligent water control can supply you with a one-stop basket solution to get your ideas and demands. From design to packaging and logistics are our duty—brass valves and fittings applied in-house, in industry, and commercial construction, in residential. There are related to water pipe control solution, and we have rich experience for outdoor frostproof hydrant and pex heating water manifold indoor.

The Top Standard Valves

Plumberstar, founded in 2006, offers high-quality, customizable residential valves and pipe fittings for plumbing and heating systems, including metal valves, brass products, bibcocks, and stainless steel accessories.
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Plumberstar offers brass and stainless steel 304 valves, as well as HPVC and cast iron plumbing parts. Available in sizes ranging from 1/4 inch to 4 inches with BSP(G) and NPT threads. Products include shut-off needle valves, heating floor manifolds with 1-inch gauges and flowmeters, brass nipples, elbows, extensions, compression fittings, and adapters. Custom manufacturing plumbing products is also available.

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Plumberstar delivers reliable, high-quality plumbing solutions with competitive pricing, extensive customization, and free pressure testing. Our ISO 9001 certified products ensure safety, efficiency, and durability, meeting international standards for residential and commercial needs.

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Safety Water Solution

Plumberstar works in residential, irrigation, and commercial application. The relief safety valves are used in various applications, such as water heaters, air compressors, its automatic release of the excess pressure or vacuum from a heating system.

Advantages of Plumberstar

Plumberstar products design based on simple structure aim to time-saving installation for consumers and aim to save the cost of customers for building construction.

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We boast 18 years of expertise in water and gas projects and long-term partnerships with top global clients.

We offer competitive pricing, tailored solutions, and flexible solutions. Quality is our cornerstone. We conduct three random inspections and a final QC check for each project, with detailed reports for clients and a 48-hour emergency response system.

Customize-Design Brass Copper Fitting

Copper Pipe fitting 1/2 inch 90-degree Elbow, nipple, bush, and reducer connects PEX Pipe in water distribution and hydronic heating systems.
Low-cost solution to connect copper Pipe Tubing, stainless steel insert, and adapter. The connection system is perfect for your next commercial or homeowner plumbing project.

Advantages for distributer, wholesaler, Supermarket and Trading

Plumberstar is looking for long-time cooperation with partners, our advantage will benefit each other, and growing together, our extra service including design, new tooling, discount and quality tracing system.

★ Moderate Pricing – Plumberstar can provide various projects with different economic basket services. Water control project drawing design and artwork works are free. 

MOQ and Delivery – Lower MOQ even reaches 100 units and sampling time within 15 working days, and the leading time is 30 working days of mass production,

Non-Disclosure Agreement – Plumberstar will not provide your competitors with the same valves and manifolds. And help you to get more market shares.

Quality and Service–Our defect rate reached 0.459% in the last two years from customers feedback, and the Inspection report can provide you with each order

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Discount and Quantity– Heavy quantity can increase production capacity with effectiveness. And the accessories and spare parts purchased with competitive cost of valves.

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Our aim is not only to provide valves but we help customers to design products,design artwork,valve proposal, book shipment,Installation tutorial

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Frequently Asked Questions

Here are typical questions by customers asked with usual, please feel free contact us if any further confused.

Brass valves have many different types, such as ball valves, garden tap, check valve, strainer, angle valve, gate valve, foot valve, and drain valve. The radiator valve and thermostatic mixing valve are works for water temperature. All of these valves are work for water plumbing systems, plumbing repair, and installation. So have to let water shut-off and shut-on. Some heating systems are related to hot water and cold water mixing for temperature control and stability. Our intelligent valves are functional. There are applications in commercial, residential, and industrial areas.

Underfloor heating radiant pex manifolds are usual for residential water distribution in a household, and it's top-rated in the home building industry. Manifold plumbing systems control hot and cold water that feeds flexible PEX supply lines to individual fixtures. Then water temperature is warm and stable in each room. Meanwhile, the heating accessories-flow meter gauge will monitor water and temperature in each room.

The motorized ball valve works automatically open and closed; they work with 220v-230v AC and 24v DC; they are applications in the heating system, air conditioner,3D printer, and others. The solenoid valve is with similar features.

Would you please submit the form at the bottom of the page or send an email My WhatsApp: +86 15968648802. Can you send us pressure demands, size package, and quantity if available?

It's able to provide free samples for your evaluation with 15 working days about.

Our MOQ is significantly lower from 100-5000 pcs are available. It depends on different items.
We can fabricate your specified requirements.

It's about 35 days if with regular proucts; New tooling and samples will take 15-20 days, Normal samples will take 7 days.

It means that you need to check the plumbing system at first, then realize your requirements, and get out different valves with different applications and functional with controlling; of course, may be no need to use brass valves due to the high cost. You can use plastic, iron, zinc alloy, and aluminum raw materials instead of brass, but brass and stainless steel are reliable with 3 years warranty. If you don't know how to choose, please call us or email us.

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