What is the difference between a swing type single valve check valve and a multi valve type?

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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.

1. The structure of the lifting check valve is generally similar to that of the globe valve, and its disc moves up and down along the center line of the channel, which is reliable in action, but the fluid resistance is large, and it is suitable for smaller diameter occasions. The lifting check valve can rotate around the rotating shaft of the valve disc of the air straight-through and 2, rotary check valve. Its fluid resistance is generally less than that of the lifting check valve, and it is suitable for larger diameter occasions.

According to the number of valve discs, it can be divided into three types: single-lobe swing type, double valve swing type and multi-valve swing type. Single-flap swing check valves are generally suitable for medium caliber applications. When a single-valve swing-open check valve is selected for large-diameter pipelines, it is best to use a slow-closing check valve that can reduce the water hammer pressure in order to reduce the water hammer pressure.

The double-valve check valve is suitable for large and medium diameter pipelines. The double-valve swing-open check valve has a small structure and light weight, and is a fast-developing check valve; Multi-lobe check valves are suitable for large-diameter pipelines; 3. The structure of the butterfly check valve is similar to that of the butterfly valve, with simple structure, small flow resistance and small water hammer pressure; 4. Diaphragm check valve has a variety of structural forms, all of which use diaphragm as opening and closing parts, due to its good waterproof performance, simple structure and low cost, it has developed rapidly in recent years, but the use temperature and pressure of diaphragm check valve are limited by diaphragm materials;

Structural features:

1. The structural length is short, and its structural length is only 1 4 1 8 of the traditional flange check valve

2. Small size, light weight, its weight is only 1 4 1 20 of the traditional flange check valve;

3. The valve disc closes quickly, and the water hammer pressure is small;

4. Horizontal pipeline or vertical pipeline can be used, easy to install;

5. The flow path is smooth and the fluid resistance is small;

6. Sensitive action and good sealing performance;

7. The disc stroke is short, and the impact force of closing the valve is small;

8. The overall structure, simple and compact, beautiful appearance;

9. Long service life and high reliability.

The double-valve check valve is used for pure pipelines and industrial, environmental protection, water treatment, and high-rise building water supply and drainage pipelines to prevent the reverse flow of media. The check valve adopts the clamp type, the butterfly plate is two semicircles, and the spring is used to force the return, and the sealing surface can be the body surfacing wear-resistant material or rubber lining, the use range is wide, and the sealing is reliable.