Check Valve
FCV is one of the best manufacturers and suppliers of large-diameter check valves in China. Since its establishment in 1935, FCV has always been a leading company in the production of low-pressure valves in China. The factory has passed the DNV ISO9001 certification for more than 15 years. It can manufacture and produce check valves with DN2000mm caliber check valves and PN2.5-25. The product design covers GB, ANSI, AWWA, API, BS, DIN, and other standards. Our company can also provide check valve design, production, or special customized production services according to your requirements. Welcome to contact us for more information or request a complete product catalog.
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Due to the customized productivity of large-diameter valves, we only show some samples.
Why choose FCV industrial valves & related products
FCV professional technical team and sales team with many years of trading experience
Our engineers specialize in market challenges and needs and are committed to producing first-class valves for customers. The perfect combination of function, quality, and materials is the reason why we provide advanced solutions for customer brands. This includes intelligence protection, which is an important part of enhancing our capabilities.Learn about our technical team.
We believe that customers provide high-quality products and better services as our purpose
Producing quality valve is a team effort requiring the joint support of the line operators, cleaning and changeover crews, and manufacturing/packaging management. Our inspection technologies provide accurate data readings, and they are backed up by the sharp senses of our inspectors, allowing us to faithfully meet your specifications.
Our strong code compilance
Our standards are highly demanding, FCV valves are engineered to meet most industry’s or key player’s requirements.
Complete after-sales service
Every valve project has different protection needs, which is why we offer a variety of flexible warranty.Learn about our after-sales service.
Check Valve Manufacturer for Over 35 Years
FCV was established in 1935 and has now become one of the most reliable non-return valve suppliers in China. We provide check valves of various designs, such as the Swing check valve and Flap valve. Check valves with diameters from DN80 to DN2000. Besides, according to the requirements of the working conditions, it can be equipped with a damping device to realize the slow closing function, or according to user requirements, the sealing pair can be a soft seal or a metal seal.
With so many designs, you can find the perfect check valve for your product! Contact FCV today and let us help you elevate your brand to a new level!
Check valve China factory
FCV has a 400000 square foot factory in China, which is fully equipped with advanced machinery and all resources and can We can produce up to 100 million yuan valve products a year without affecting their quality. Even if we have high productivity, our modern equipment, comprehensive manufacturing process, and extensive quality control can still guarantee quality.
Other benefits of working with FCV valves include:
#1 High-quality check valve at a competitive price
Since we can produce tens of thousands of tons of valves and penstock every year, we can supply our check valves in batches at a competitive price. One of our goals is to help companies develop to provide all our industrial valves at an appropriate cost. In this way, the company can use its financial resources for other important factors. Please rest assured, even though the price is attractive, all our valves are of high quality and made of the best materials.
#2 Professional technical team and experienced foreign trade commissioners
Our excellent specialists will confirm the details of the order with you through technical drawings before the order is put into production, and our technical engineers will participate in it. You will be assured that you will only receive high-quality valve products.
#3 24/7 Customer Support
At Roetell, you can always be confident that someone will assist you with your concerns no matter where you are in the world. Our after-sales support is made up of a team of experts that will be ready to help you with any concerns. For any questions or assistance with your product, please send us a message immediately and a representative will get back to you right away!
About check valve
The role of check valve:
A check valve, clack valve, non-return valve, reflux valve, retention valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.
The opening and closing of the check valve rely on the flow of the medium to open and close by itself. The check valve is an automatic valve product. The check valve only allows the medium to flow in one direction to be used in the pipeline to prevent the phenomenon of medium backflow. It has a wide range of applications and can be used in large and small diameters, various media, and high-voltage systems in power stations.
Principle of check valve:
The opening of the check valve refers to the opening of the valve flap by the positive flow of the medium. In the same way, the medium backflow pushes the valve flap to close. Check valves are also called check valves, one-way valves, reverse flow valves, and back pressure valves. Most of them are automatic valves, whose main function is to prevent the medium from flowing backward, to prevent the pump and drive motor from reversing, and the container medium to discharge. It is also used for safety protection in auxiliary systems where the pressure may rise to exceed the system pressure.
Classification of check valves:
The check valve is mainly used to prevent the medium in the pipeline from flowing back. The bottom valve and duckbill valve also belong to the check valve series.
Check valves can be divided into three types: lift check valve, swing check valve, and disc check valve；
1. The lift check valve is divided into two types: vertical and horizontal. The structure of the lift check valve moves along the axis.
Applications:
- The lift-type silent check valve is used in pipelines with high-quality requirements for water supply and drainage engineering; at the same time, it can be installed at the outlet of the pump and requires relatively high pressure in the pipeline network. It is an important product for waterproof impact check valves.
- The lift-type silencing check valve is suitable for the water supply and drainage system of high-rise buildings and the outlet of the pump, not suitable for sewage pipeline occasions.
- A horizontal check valve is suitable for diving, drainage, and sewage pumps, especially for sewage and sludge systems.
2. Swing check valve is divided into a single valve, double valve, and multi-valve. The structure of the swing check valve is based on the center of gravity.
Applications:
- The swing-type rubber check valve is used in urban water pipe network systems and is not suitable for sewage pipelines with a lot of sediment.
- Swing single check valve has the widest application range. It can be installed on pipelines of water supply and drainage, petroleum, chemical industry, metallurgy, industry, etc. It is most suitable for occasions with limited space.
⑶The disc check valve structure is straight-through.
Applications:
- The dish-type double flap check valve is mainly used in water supply pipelines of high-rise buildings and fluid pipelines containing corrosive media and sewage.
- Swing single check valve has the widest application range. It can be installed on pipelines of water supply and drainage, petroleum, chemical industry, metallurgy, industry, etc. It is most suitable for occasions with limited space.
- A horizontal check valve is suitable for diving, drainage, and sewage pumps, especially for sewage and sludge systems.
Selection criteria for check valves:
- In order to prevent the medium from flowing back, check valves should be installed on the equipment, devices, and pipelines;
- Check valves are generally suitable for clean media, not for media containing solid particles and high viscosity;
- Generally, vertical lift check valves should be used on horizontal pipes with a nominal diameter of 50mm;
- The straight-through lift check valve can be installed on both horizontal and vertical pipelines;
- For the inlet pipeline of the water pump, a bottom valve should be used. The bottom valve is generally only installed on the vertical pipeline at the pump inlet, and the medium flows from bottom to top;
- The lifting type swing type has good sealing performance and large fluid resistance. The horizontal type should be installed on the horizontal pipeline, and the vertical type on the vertical pipeline;
- The installation position of the swing check valve is not restricted. It can be installed on a horizontal, vertical, or inclined pipeline. If installed on a vertical pipeline, the flow direction of the medium should be from bottom to top;
- The swing check valve should not be made into a small-diameter valve, it can be made into a very high working pressure, PN can reach 42MPa, and DN can also be large, the maximum can reach more than 2000mm. According to the material of the shell and the seal, it can be applied to any working medium and any working temperature range. The medium is water, steam, gas, corrosive medium, oil, medicine, etc. The working temperature range of the medium is between -196–800℃;
- The applicable occasion is low pressure and large diameter, and the installation occasion is restricted;
- The installation position of the butterfly check valve is not restricted. It can be installed on a horizontal pipeline, or on a vertical or inclined pipeline;
- The diaphragm check valve is suitable for pipelines that are prone to water hammer. The diaphragm can well eliminate the water hammer caused by the backflow of the medium. It is generally used on low-pressure and normal temperature pipelines and is especially suitable for tap water pipelines. Normal media work The temperature is between -12-120℃.
- The spherical check valve is suitable for medium and low-pressure pipelines and can be made into a large diameter;
- The spherical check valve is used in the pipeline of the general corrosive medium. The shell material of the spherical check valve can be made of stainless steel. The hollow sphere of the seal can be wrapped with polytetrafluoroethylene engineering plastic. The working temperature is -101–150 ℃, the nominal pressure is ≤4.0MPa, and the nominal passage range is between 200-1200;
- When selecting check valves for incompressible fluids, the required closing speed must be evaluated first, and the second step is to select the type of check valve that may meet the required closing speed;
- The check valve for compressible fluid can be selected according to the similar method of check valve for an incompressible fluid. If the medium flow range is large, the check valve for compressible fluid can be used A deceleration device, if the medium flow is stopped and started quickly and continuously, such as the outlet of the compressor, a lift check valve is used;
- The check valve should determine the size of the response, and the valve supplier must provide data on the selected size so that the valve size when the valve is fully opened at a given flow rate can be found;
- For high and medium pressure check valves below DN50mm, vertical lift check valves and straight-through lift check valves should be used;
- For low-pressure check valves below DN50mm, butterfly check valves, vertical lift check valves and diaphragm check valves should be used;
- For high and medium pressure check valves larger than DN50mm and smaller than DN600mm, swing check valves should be used;
- For medium and low-pressure check valves larger than DN200mm and smaller than DN1200mm, wear-free spherical check valves should be selected;
- For low-pressure check valves larger than DN50mm and smaller than DN2000mm, butterfly check valves and diaphragm check valves should be used;
- For pipelines that require relatively small water hammer impact or no water hammer when closed, slow-close swing check valves and slow-close butterfly check valves should be selected.