What is the structural length of the check valve?

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

CLASS150 lbs: DN200 structure length is 495mm, DN400 structure length is 864mm

The types and diagrams of check valves are as follows:

1. The lifting check valve refers to the valve that automatically opens and closes the valve disc by relying on the flow of the medium itself to prevent the backflow of the medium, also known as check valve, check valve, reverse flow valve, and back pressure valve. The check valve is an automatic valve, and its main function is to prevent the backflow of the medium, prevent the pump and the drive motor from reversing, and the discharge of the container medium.

2. The swing-open check valve is also known as a check valve or a check valve, and its function is to prevent the backflow of the medium in the pipeline. The opening and closing parts rely on the flow and force of the medium to open or close by themselves, so as to prevent the medium from flowing backwards. Check valves belong to the automatic valve category, which are mainly used on pipelines where the medium flows in one direction, and only allow the medium to flow in one direction to prevent accidents.

This type of valve should generally be installed horizontally in the pipeline.

3. Butterfly check valve refers to a valve that automatically opens and closes the valve disc by relying on the flow of the medium itself to prevent the medium from backflowing, also known as check valve, check valve, reverse flow valve, and back pressure valve. The check valve is an automatic valve, and its main function is to prevent the backflow of the medium, prevent the pump and the drive motor from reversing, and the discharge of the container medium.

4. Forged steel check valve refers to a valve that automatically opens and closes the valve disc by relying on the flow of the medium itself to prevent the medium from backflowing, also known as check valve, check valve, reverse flow valve, and back pressure valve. The check valve is an automatic valve, and its main function is to prevent the backflow of the medium, prevent the pump and the drive motor from reversing, and the discharge of the container medium.

5. Silent check valve refers to a valve that automatically opens and closes the valve disc by relying on the flow of the medium itself to prevent the medium from backflowing, also known as check valve, check valve, reverse flow valve, and back pressure valve. The check valve is an automatic valve, and its main function is to prevent the backflow of the medium, prevent the pump and the drive motor from reversing, and the discharge of the container medium.

Abstract:The working principle of check valve is to control the opening and closing of the valve disc through the action of the fluid pressure of the medium, when the medium flows in the opposite direction, the fluid pressure and the self-reclosing disc of the valve disc act on the valve seat, so as to cut off the flow and prevent the reverse flow. There are many structural forms of check valves, including swing type, lifting type, butterfly type, pipeline type, compression check type, bottom valve, spring type, Y type, etc., you can choose the appropriate structure according to the actual needs, let's learn about the principle and structural form of the check valve.

1. What is the principle of check valve?

Check valve is a commonly used valve, mainly used to prevent the backflow of the medium, to prevent the pump and the drive motor from reversing, as well as the release of the container medium, and can also be used to provide supply to the auxiliary system where the pressure may rise to exceed the system pressure on the pipeline, so what is the principle of the check valve?

The working principle of the check valve is very simple, it works automatically, under the action of the fluid pressure flowing in one direction, the valve disc opens; When the medium flows in the opposite direction, the fluid pressure and the self-closing disc of the disc act on the valve seat, thus cutting off the flow.

2. What are the structural forms of check valves?

Check valves have a variety of different structural forms, and the appropriate structure can be selected according to the use occasion and installation needs

1. Swing-open check valve.

The disc of this check valve is disc-shaped, and the sleepy stove rotates around the rotating shaft of the valve seat channel, which is suitable for large diameter occasions with low flow rate and infrequent flow changes, but it is not suitable for pulsating flow.

2. Lifting check valve.

The valve disc is a check valve that slides along the vertical centerline of the valve body, this check valve can only be installed on the horizontal pipeline, the valve disc can be used as a round ball on the high-pressure small-caliber check valve, the upper part of the valve disc and the lower part of the valve cover are processed with a guide sleeve Jane, the valve disc guide Jane can be freely lifted in the valve lamp guide Jane, when the medium flows downstream, the valve disc is opened by the medium thrust, and when the medium stops flowing and cracks, the valve disc falls on the valve seat by self-sagging, and plays the role of preventing the medium from flowing back.

3. Butterfly check valve.

Butterfly check valve is a kind of butterfly valve, which is a check valve in which the disc rotates around the pin shaft in the valve seat, which has a simple structure and can only be installed on the horizontal pipeline, and has poor sealing.

4. Pipeline check valve.

The valve with the disc sliding along the centerline of the valve body is a new type of check valve, which has many advantages such as small size, light weight and good processing technology, and is one of the development directions of check valves.

5. Compression check valve.

This is a special-purpose check valve, mainly for boiler feed water and steam shut-off valve, with the comprehensive function of lifting check valve and globe valve or angle valve.

Please refer to JBT 308-2004 valve model compilation method.