Wafer check valve is also known as backflow valve, back pressure valve, check valve. This type of valve opens and closes automatically by the force generated by the flow of medium in the pipeline. It is an automatic valve. Wafer check valve is a kind of check valve widely used in various industries at present. Its main role is to prevent the medium backflow. Wafer check valve can be divided into single disc check valve and double disc check valve.Wafer check valve is mainly divided into single-valve type and double-valve type according to the valve calibre. The purpose is to prevent the medium from stopping or backflow, weakening the hydraulic impact.
In this article TWT,China will introduce two well-known check valves mentioned above, as well as an emerging product.
Single disc wafer butterfly valve
The single disc wafer check valve is a disc type ultra-thin check valve. The valve disc is equipped with an O-ring, which has good sealing performance and is spring-assisted closing. It is sensitive in action and is especially suitable for places with limited installation space. Suitable for Z type. It has the advantages of simple structure, beautiful appearance, light weight and easy installation. It is mainly suitable for industrial sectors such as water supply systems, petroleum, chemicals, and metallurgy, and is most suitable for places with limited installation space.
Characteristics of single disc wafer butterfly valve:
- 1. The single disc wafer check valve has an integral structure, which is simple and compact. It has small impact force when closing the valve, small water hammer pressure, long valve life and high reliability.
- 2. It can be installed horizontally or vertically. It is light in weight and does not need to set a support for the valve.
- 3. The structure is short in length, small in size and light in weight, which brings great convenience to the installation, transportation and storage of pipelines for valves, and can save a lot of materials and reduce costs.
- The flow channel is smooth, the fluid resistance is small, and the valve disc can be opened safely under a small pressure difference.
Dual disc wafer butterfly valve
Dual disc wafer check valve is composed of valve body, valve disc, valve stem, spring and other parts, and adopts wafer-type connection. Because the valve disc has a short stroke and is spring-loaded, water hammer can be significantly reduced. This valve is mainly suitable for water supply and drainage pipes in cities, industries and high-rise buildings. Since its structural length is shorter than ordinary check valves, it is more suitable for places with limited installation space.
Application of dual disc check valve
The dual disc wafer check valve is used for clean pipelines and pipelines for industry, environmental protection, water treatment and water supply and drainage system in high-rise buildings to prevent reverse flow of media. The dual disc wafer check valve adopts a wafer type and has two discs. It is semi-circular and uses a spring to force reset. The sealing surface can be made of wear-resistant material such as body surfaces or lined with rubber, hard metal and other seals. It has a wide range of applications and reliable sealing.
New type of check valve
Axial flow check valve is also called cross-flow check valve. Check valve refers to a valve that relies on the flow of the medium itself to automatically open and close the valve disc to prevent the backflow of the medium. It can be called a one-way valve, a counterflow valve, Check valve, back pressure valve, etc. The cross-flow check valve is a new product after the introduction of new standards in 2008. In addition to the functions of a general check valve, this product is also designed with a shock-absorbing spring.
Its hard seal and soft seal are combined valve seat sealing structures. It has sound-absorbing and shock-absorbing effects, making it easy for users to conduct on-site maintenance. The cross-flow check valve adopts a special sealing structure. Regardless of the pressure behind the valve, the valve closes tightly and has good sealing performance. It overcomes the shortcomings of general check valves with poor sealing performance at low back pressure.
No matter what kind of check valve you need, new or traditional one, TWT,China ensures that our technology keeps up with the forefront of the industry and the quality remains the same.
For more information, please contact us.