The working principle of China’s gate valve is explained in detail: the gate lifting realizes the opening and closing of the fluid channel

The working principle of China’s gate valve is explained in detail: the gate lifting realizes the opening and closing of the fluid channel

Chinese gate valve, as an important part of the fluid control system, its working principle and performance directly affect the operating efficiency and safety of the entire system. This article will analyze the working principle of Chinese gate valves in detail from a professional perspective.

First, the basic structure of China gate valve

Chinese gate valve is mainly composed of valve body, valve cover, gate plate, valve stem, sealing ring, packing and other components. Among them, the valve body is the main part of the valve, which is used to connect the pipeline; Valve cover is mainly used to close the valve body; The gate plate is the main switching part of the valve, which can open and close the fluid channel by lifting and lowering. The valve stem is used to drive the gate lift; Sealing ring and packing are mainly used to ensure the sealing performance of the valve.

Second, the working principle of China gate valve

1. Opening process: When the stem is lifted upward, the gate rises with it, so that the channel between the valve seat and the valve body gradually opens, and the fluid can flow through this channel. This process is achieved by driving the ram up and down through the valve stem.

2. Closing process: When the stem moves down, the gate drops, so that the channel between the valve seat and the valve body is gradually closed, and the fluid cannot flow through this channel. This process is also achieved by the valve stem to drive the ram up and down.

Third, the characteristics of China gate valve

1. Simple structure: The structure of China gate valve is relatively simple, mainly composed of several components, easy to manufacture and maintain.

2. Good sealing performance: the sealing surface of Chinese gate valves is usually flat or annular, which can achieve good sealing effect.

3. Small fluid resistance: Because the lift of the gate can realize the opening and closing of the fluid channel, the fluid resistance of the Chinese gate valve is relatively small.

4. Large operating force: Because the lift of the gate needs to be driven by the valve stem, the operating force of the Chinese gate valve is relatively large.

5, not suitable for regulating flow: because the lift of the gate can only realize the opening and closing of the fluid channel, the size of the fluid channel can not be adjusted, therefore, the Chinese gate valve is not suitable for regulating flow.

Fourth, the application of China gate valve

Because the Chinese gate valve has the characteristics of simple structure, good sealing performance, low fluid resistance, etc., it is widely used in the fluid control system of petroleum, chemical industry, metallurgy, electric power and other industries. Especially in the need for frequent opening and closing occasions, such as cutoff, cutting off and other operations, the performance advantages of China gate valves are more obvious.

In summary, the Chinese gate valve is a kind of valve that realizes the opening and closing of the fluid channel through the lifting gate. Its simple structure, good sealing performance and low fluid resistance make it widely used in various fluid control systems. However, due to its large operating force, not suitable for regulating flow and other shortcomings, it also limits its application in some special occasions.