Brass Spring Check Valve N10161001 is an economical design with lower costs, used to prevent the pipelines from back flow. Forged brass body enables it can stand higher pressure and ensures valve body perfect mechanical performance. Each brass spring check valve are leakage test during production.

Parameters:

• Sizes: 1/2" to 4" (DN15 to DN100)

• Working pressure: PN16 / 200WOG

• Working temperature: -10 to 120℃

• Standard bore design

• Sandblasted and nickel-plated

• BSP or NPT threads available

• Customized production acceptable

• Materials: CW617N, HPb57-3, C37700, DZR

Features:

• The valve disc closes quickly and the water hammer pressure is small

• Both horizontal pipes and vertical pipes can be used, easy to install

• The flow rate is unobstructed with small resistance

• Sensitive action, good sealing performance

• Short disc stroke and small closing impact

• Long life durability and reliable performance

• 100% leakage test for each valve

Parts	Material
Body	Brass
Cap	Brass
Stem	Brass
Spring	Stainless steel
disc	Plastic/brass
Handle	N/A
Handle Spin	N/A

What is brass check valves

Brass check valve is an automatic valve whose opening and closing parts are circular discs and rely on its own weight and medium pressure to generate actions to block the back flow of the medium, also known as check valve, one-way valve, non return valve or isolation valve. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the weight of the disc and its flow resistance, the check valve is opened. On the contrary, the valve is closed when the medium flows back. There are two types of brass check valves: 1. brass spring check valve, also called vertical check valve, with a spring disc inside to prevent back flow; 2. brass swing check valve, also called horizon check valve, with brass brass plate disc insider, the flow can only go through in one direction.

Applications of brass check valves

The brass check valves are made of brass with high precision, can be installed vertically and horizontally. It is mainly used to prevent the medium from flowing back in the pipeline system, widely used for water, oil, gas, liquid, saturated steam less than 120℃, in applications of water supply, gas supply, heating, pumping and irrigation system.

How to select brass check valves

1. Confirm the functions of brass check valves

different functions and applications require different types of check valves, for example, brass swing check valve, brass spring check valve, brass foot valve.

2. Confirm the working pressure of brass check valves

depending on pipeline pressure needs, the brass check valves are designed with valve wall thickness and port sizes, such as PN16 brass check valve, PN20 brass check valve, PN40 brass check valve.

3. Confirm bore size of brass check valves

There are three different types of brass check valve:

1). Full bore brass check valve offers no flow restriction, which means that when it is open, the liquid can flow freely through it. This is achieved by making the ball larger than the passage size, so that the hole can be the same size as the passage.

2). Standard bore brass check valve does not have an oversized ball, and as a result, the hole is one size smaller than the passageway. This creates a small amount of flow restriction as the fluid passes through.

3). Reduced bore brass check valve, on the other hand, has an smaller ball and an even smaller hole, which creates significant flow restriction as the fluid passes through it.

4. Confirm thread type of brass check valves

Thread types differ from markets and applications: BSP threads for Europe and NPT threads for North America, also other metric threads, which you must confirm before buying brass check valves.

5. Confirm material type of brass check valves

We currently work with HPb57-3 brass radiator valves for most customers in Europe and Asia, CW617N brass check valves for Europe, C377700 and lead free brass for North America.

7. Confirm surface treatment of brass check valves

Rough brass color, nickel-plating, and chrome-plating are most widely used surface treatments for brass check valves. Plating helps to protect the check valves from oxygen and look shining.

How to install brass check valves

1. Before installing brass check valve, make sure the flow direction is same as the arrow direction on valve body. Incorrect direction may make the valve can't work, even broke the valve and pipeline.

2. Clean and remove any objects from the pipes (in particular bits of sealing and metal), which could obstruct and block the valves.

3. Ensure that both connecting pipes either side of the valve (upstream and downstream) are aligned (if they are not the brass spring check valves may not work correctly).

4. Make sure that the two sections of the pipe (upstream and downstream) match, the brass check valve will not absorb any gaps. Any distortions in the pipes may affect the tightness of the connection, the working of the valve and can even cause a rupture.

Chemical compositions we use for brass check valves

1. China/Global Market

HPb57-3, HPb58-3, HPb59-1, HPb59-3 are most common materials used for China brass check valve, which are acceptable for most countries in the world, except for those customers have special requirements.

HPb57-3, also called China Normal brass, a variant of CW614N brass, is a local industry standard, with little Fe contents in composition, and lower costs than CW614N. It’s widely used as a standardized material in China and accepted by most global markets and customers.

HPb58-3, is a variant of CW617N brass and commonly used for brass check valves in China local market.

HPb59-1, has less Fe, Pb and higher price costs, it’s more used for high-quality products or market, such as brass fittings for USA market.

2. European Market

CW614N and CW617N brass materials are widely used for European brass check valves.

CW617N brass has better physical property to stand higher working pressure and temperature, more importantly the Pb percentage share is less than 2.5% and applicable for drinking water systems, good for environment and people’s health.

CW614N Brass is also popularly used because of similar compositions and lower costs, suitable for those applications without much environmental requirements.

3. USA Market

C46500 and C377700 are most widely used materials for USA brass check valves.

As a requirement of AB1953 regulations, all the brass valve parts which contact the water shall have Pb content less than 0.25%, also called lead-free brass or no-lead brass, all the brass water valves for USA market, such as ball valves, brass gate valves, brass check valves, brass angle valves, have been compulsory to use lead free brass.

For those brass valves not for water use, such as brass radiator valves, heating valves, C377700, or China standard HPb59-1 brass materials are workable.

Surface treatments of brass check valves

Surface treatments provide good protection to brass check valves

Rough color is brass check valve body sandblasted and without plating.

Electroplating (nickel-plating and chrome-plating) can enhance the corrosion resistance of brass check valves, increase hardness, prevent abrasion, improve conductivity, smoothness, heat resistance.

How we produce brass check valves

1. Brass raw materials are bought from local suppliers in forms of brass bars.

2. Brass bars are cut into smaller pieces with different sizes according to order requirements, heated with natural gas.

3. The heated brass bars are forged by forging machines, Out-comings are semi-finished rough brass check valve bodies.

4. The rough brass check valve bodies are trimmed and cut off unnecessary parts.

5. The rough brass check valve bodies are washed with sanding machines, to clean the dirty and oils during production.

6. The rough brass bodies are machined by CNC machinery for threads and dimensions.

7. The machined brass check valve bodies are nickel- or chrome-plated.

8. The brass valves are ready for delivery after final finished goods quality inspection.

How we pack brass check valves

Brass check valve packing is very important for safe transport and brand appearance.

We pack brass check valves in small inner boxes, then put into outer cartons, finally load in wooden pallets.

It will protect the goods well and can avoid damages and wet.

We also pack as per customers' OEM designs.

How we test brass check valves

Our test laboratory equips with various devices for brass check valve quality inspect and control, as well as new product development.

Equipment include material spectrometer analyzer, flow rate tester, torque tester, body resistance tester, endurance tester, high-low temperature tester.

These equipment enable us to analyze brass check valve material compositions and type tests according to related standards, ensure our brass check valves are correctly designed and produced.

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