What kind of valve does a gate valve belong to? How to choose correctly

Here are some 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, Chaoda, 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.

Gate valve (gate valve) is an opening and closing part of the gate, the direction of movement of the gate is perpendicular to the direction of the fluid, the gate valve can only be fully opened and closed, the discomfort of the door parameters are different, usually 5°, when the medium temperature is not high, it is 2°52'. Improve its manufacturability and make up for the deviation of the sealing surface angle in the processing process.

Features: 1. Light weight: The body is made of high-grade ductile iron, which is about 20% 30% lighter than the weight of traditional gate valves, and is easy to install and maintain.

2. Flat-bottomed gate seat: The traditional gate valve is often accumulated in the groove of the bottom of the valve due to external objects such as stones, wood, cement, iron filings, sundries, etc., which is easy to cause water leakage phenomenon due to the inability to close tightly.

3. Overall rubberization: the ram is made of high-quality rubber for the overall inner and outer rubber, and the first-class rubber vulcanization technology in Europe makes the vulcanized ram able to ensure accurate geometric dimensions, and the rubber and ductile cast ram are firmly connected, not easy to fall off and have good elastic memory.

4. Precision casting valve body: The valve body is made of precision casting, and the precise geometric size makes the valve body without any finishing to ensure the tightness of the valve.

Scope of application: The gate valve is only used for the operation of the medium on all kinds of pipelines or equipment that is fully open and closed, and is not allowed to be used for throttling.

For gate valves with handwheels or handles, no auxiliary bars should be added during operation (if the sealing is not tight, the repair sealing surface or other parts should be checked). The handwheel and handle rotate clockwise to close, and vice versa. The gate valve with the transmission mechanism should be used in accordance with the provisions of the product instruction manual.

The gate valve itself has a unique structure, the flow resistance is smaller than that of the butterfly valve, and the sealing performance is also better. The gate valve is laborious to open and close, and the opening and closing speed is slow, and the gate valve is obviously not suitable for frequent operation or emergency shut-off occasions. The gate valve can only be fully opened and closed, and cannot be used to regulate the flow rate.

Therefore, gate valves are mostly used for cutting off the flow of medium in pipelines that have strict requirements for sealing performance and do not need to be opened and closed frequently. Gate valves are not suitable for flow regulation.

Compared with butterfly valves, gate valves are more adaptable and can be used in high temperature, low temperature, high pressure, low pressure and other working conditions. In steam pipelines and large-diameter feed pipes, gate valves are suitable due to the need for high sealing performance and low fluid resistance.

1) The flow direction of the fluid in the Four Seasons Muge equipment does not change when it passes through the gate valve, and the resistance coefficient is almost the smallest among all valves when the gate valve is fully opened, and the applicable caliber range, pressure and temperature range are very wide. Compared to the same caliber globe valve, its installation size is smaller, so it is the most used type in chemical production plants. (2) The handle of the gate valve is divided into two types: clear rod and dark rod

The open rod gate valve is particularly advantageous when it is used for alternate switching between two or more sets of the same equipment, and the open rod can clearly mark the opening and closing of the valve. (3) When the gate valve is half open, the valve core is easy to vibrate, so the gate valve is only suitable for fully open or fully closed situations, and is not suitable for occasions that need to adjust the flow rate. (4) There is a groove in the valve body of the gate valve, so it is not suitable for fluids containing solid particles.

In recent years, gate valves with air blows have been available for this purpose.