Name: China Flanged Check Valve Manufacturers Suppliers Factory - Customized Flanged Check Valve
Brand: Aodehua
SKU: 214381360

Wholesale Flanged Check Valve Supplier

Zhejiang AODEHUA Technology Co., Ltd. is located in the beautiful and rich East China Sea - Yuhuan City. Founded in 2002, Aodehua Group specialized in the production of brass water plumbing valves for more than 20 years. Set development, forging, manufacturing, testing, and sales as one, superb technology, and stable and reliable quality make "AOHUA" products win the favor of consumers.

Various Types

Our products cover the entire heating and plumbing system, such as ball valves, gas valves, gate valves, manifolds, TRV, air vent valves, water radiators, magnetic filters, etc.

Quality Assurance

The entire production process is controlled by the ISO9001 product quality management system. The pass rate of the products is 100%.

Fast Delivery

Our company's monthly production capacity reaches 1 million sets, and we can achieve fast and on-time delivery.

24H Online Service

Our customer service representatives are available 24/7 to assist you with any inquiries, technical issues, or after-sales services.

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What Is Flanged Check Valve?

A flanged check valve is a valve designed for the purpose of isolating media as it flows through the piping system. It performs this function through its ability to open and close simultaneously. Such valves are meant to work on different types of media that is slurries, liquids, gases, vapors, and steam.

Product Parameter

1. Nominal pressure: PN≤1.6MPa

2. Working medium: Water, Non-corrosive liquid

3. Working temperature: -20℃≤T≤120℃

4. Pipe thread to ISO 228

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Advantages of Flanged Check Valve

High Reliability

The check valve has a simple structure, easy maintenance, good sealing and reliability, and is not prone to failure.

Save Energy

Relying on the pressure difference of the material itself as the medium to achieve opening and closing, no additional power equipment is needed, which can save energy.

High Safety

Check valves can effectively prevent accidents such as medium backflow and pipeline bursting, and play a role in ensuring equipment and personal safety.

Economical And Practical

The check valve has low cost, simple operation and long service life. It is widely used in flow pipeline systems of various media.

High Speed

They operate fast relative to other valves that need several turns of the handwheel to close or open like gate valves.

Flanged Check Valve: Everything You Need to Know!

Flanged check valves are used to prevent reverse fluid flow in different applications. These valves operate automatically using the pressure difference principle in which they open when the inlet fluid pressure is high like when the pump is on and close when suction pressure is low or when the pump is turned off. Also, these valves can be used in either low or high temperatures depending on the material used to construct internal parts.

Components of Flanged Check Valves

Valve Body

This is the main part of a flanged check valve which is used to contain internal parts. The valve body is made of brass material and is very strong. The high strength of the body helps to protect the internal parts and the entire valve against high pressure and impact damage which may be from falling objects or when the valve falls.

Bonnet/Cover

This is the part of a flanged check valve that is placed on top of the valve body to serve as the valve cover. Flanged check valve manufacturer designs the bonnet and body with the same material enhancing valve strength and tight connection. The body and the bonnet are connected using bolts and nuts.

Valve Disc

This is the part of a flanged check valve that is used to open and close the fluid flow. The disc opens when there is low suction pressure and it closes when the suction pressure reduces or the pump is turned off.

Spring

This is a component used to help the valve disc return to its seating position when the pump is turned off or when there is backflow. In such valves, the disc closes by using gravity or backflow.

Seat

This is a component of a flanged check valve which is mounted between the valve body and the disc to prevent fluid leakage as well as serve as the seating surface when the disc closes.

Gasket

This is a component placed between the mating faces of the valve and the pipe to prevent fluid leakage. It is also placed between the bonnet and the body mating faces to enhance the tight seal.

Application of Check Valve

Municipal Engineering

Check valves are used in municipal water supply, drainage, heating and other pipeline systems to protect the safety and normal operation of the system.

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Medical Industry

In the drainage pipeline of medical catheters in hospital operations, check valves can maintain the normal discharge of fluid even if the direction of gravity is unfavorable.

Marine and Aviation Fields

Prevent large ships and aircraft from causing adverse effects on pipelines due to excessive water pressure or low air pressure in rough oceans and high-altitude environments.

Industrial Field

Industrial fields where automobiles, machinery and other equipment are engaged may involve pipeline systems, and check valves are required to protect their safety and normal operation.

How do you Choose Flanged Check Valves?

Choosing a suitable Flanged Check Valve means a perfect process system. You need to select the valve after thorough consideration of various factors.

Material: It should be compatible with the medium.

Size: The size of connection points should align with that of the Flanged Check Valve.

Maximum Pressure and Cracking Pressure Requirement: The Flanged Check Valve chosen should withstand the pressure of the medium.

Installation Requirement: This depends on whether the installation should be horizontal or vertical.

Temperature: The Flanged Check Valve should be able to withstand the external and media temperatures.

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FAQ

Q: What is the difference between a wafer check valve and a flanged check valve?

A: Wafer butterfly valves are not as convenient as flanged butterfly valves in installation, because they need to be equipped with flanges, which can easily leak if they are not installed well. connected with the flanges at both ends by a set of bolts/nuts.

Q: What is a double flanged check valve?

A: Flange dual plate check valves have two plate in the body, work automatically and most are not controlled by a person or any external control. Double Flange check valve is designed to provide a cost-effective solution to your flow control and product shut-off requirements.

Q: What is the function of a flanged valve?

A: Primarily, flanged valves control the flow in pipelines by opening, closing, or obstructing different pathways. The valve flanges are bolted together with a gasket sandwiched between them to prevent leakage.

Q: What is the flanged check valve method of control?

A: The flanged check valve is basically controlled by the difference in pressure. It requires a higher pressure on the input side and a lower pressure on the outlet side to open. When the pressure on the output side is higher than that of the input side, it closes to prevent backflow. It controls the flow of fluid in the piping system by opening, closing or partially blocking various passageways in the process flow. The position of the disc and handle changes depending on whether the valve is open or shut. A build-up of pressure on the output side could result in the failure of the valve and the whole flow at large.

Q: What are the different types of flange valves?

A: The major types of flanged valves are ball valves, check valves, butterfly valves, globe valves, and relief valves. Check Valves: It is used to prevent backflow in a piping system and they can sustain heavy pressure.

Q: What is a wafer check valve?

A: Wafer check valves are in-line piping valves used to control fluid flow direction and reduce or fully prevent possible backflow within plumbing systems. Wafer check valves are also known as clack valves, reflux valves, nonreturn valves and one-way valves.

Q: How do you size flanged check valves?

A: The selected check valve should have the right size. In order to do this, you should determine the minimum velocity required to lift the disc of the valve. Then, find the mean velocity of flow in the piping system. The mean velocity should be greater than or equal to the minimum required velocity. The accuracy of determining the right size comes with various advantages evident in usage.

Q: What is the difference between a check valve and a double check valve?

A: A double check valve consists of two attached units. Single check valves provide a good level of protection but they can be doubled in settings where it is essential to prevent contamination through backflow - for example, in drinking water pipes.

Q: What are flanged valve end connections?

A: Flanged Valve End Connections - These are one of the easiest connections to be installed or uninstalled from a pipeline. These are also one of the most commonly used end connections at present. As these are fastened to the pipe flanges, assembling or disassembling them is quick and easy.

Q: Why do we use double-check valves?

A: Having two check valves instead of one is useful because one check valve will still act, even if the other is stuck open. Also, the shutting of one valve reduces the pressure differential across the other, allowing a more dependable seal and circumventing any sort of leak.

Q: What are the Temperature considerations for flanged check valves?

A: During the selection of the flanged check valve, you should consider the external temperature as well as that of the medium in question. It should resist the high temperature of the medium for efficiency. If it cannot withstand the high temperature, it might burst to cause leakage of the medium, hence corrosion of the pipes. The material should be compatible with the medium. The best material recommended is Viton since it withstands all the conditions.

Q: What is the working principle of a check valve?

A: How does a check valve work? The check valve working principle is based on allowing flow in one direction and automatically preventing flow in the reverse direction. Check valves are one of the only valves that are completely self-automated and do not require human interaction to manually cycle them.

Q: What is the principle of the check valve?

A: Check valves are generally installed in pipelines to prevent backflow. A check valve is basically a one-way valve, in which the flow can run freely one way, but if the flow turns, the valve will close to protect the piping, other valves, pumps, etc.

Q: Does a check valve reduce flow?

A: Yes, they do as that is their purpose. They restrict the flow in one direction 100%. in the reverse direction (open) they will never get to 100& flow as it takes a small amount of effort to shift the valve from the blocked direction to the flow direction.

Q: Do valves have flanges?

A: Flanged connections are often seen in valves larger than 4 inches in diameter and are common in industrial applications. Flanges are easy to install and remove for routine cleanings.

Q: Does a double check valve reduce pressure?

A: a single check valve has 1 non-return ball, double has 2. There will be a slightly greater pressure loss with a double. Assuming you have no h/w pipe blockages or supply problems, to reduce the effect of the valve you could try fitting a 22mm valve with 15/22 reducers before and after it.

Q: What is the working pressure of a check valve?

A: The tests consist of both low and high pressure shells for up to 4,500 psi, the equivalent of 310 Bar. Miniature check valves feature a working pressure of up to 6000 psi with a cracking pressure from 3 to 350 psi. A minimal pressure drop and bubble-tight shut off are included in both check valve series.

Q: Where is the check valve located?

A: Check valves are often placed on the outlet side of a pump, to protect the pump from backflow. Depending on the application, parameters for how far the valve should be placed from other equipment may be required.

Q: What is flanged check valve pressure rating?

A: The maximum and cracking pressure in the flanged check valve basically makes the valve work. The cracking pressure refers to the least pressure needed to push the valve open and allow the fluid to flow through. The inlet pressure should be higher than the outlet pressure to ensure that it does not flow back and cause contamination. The Flanged Checking Valve should be strong enough to withstand or resist the maximum and cracking pressure of the media.

Q: How does a check valve prevent backflow?

A: Backflow occurs when pressure changes in pipes cause the flow of liquids, gas, or semisolids to reverse in the wrong direction. Check valves are designed to ensure substances in a pipe only flow one way, automatically closing to prevent unwanted backflow if the direction is reversed.

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