What are the uses and materials of gate valves?

A gate valve is a valve used to control the flow of fluid in a pipeline. Its working principle is to open or close the flow channel by moving the valve plate (gate) up and down. Gate valves are widely used in industrial pipelines, especially in situations where they need to be fully opened or fully closed, and are not suitable for regulating flow.

1. The main uses of Gate valves:
1. Flow control: Gate valves are often used to switch the flow of fluids in pipelines, and are suitable for flow control of fluids such as water, oil, and gas.
2. Complete switch: Gate valves are designed to be fully opened or fully closed, so they are particularly suitable for situations where the flow of pipelines needs to be completely closed.
3. High-pressure and large-diameter pipelines: Gate valves are suitable for high-pressure and large-diameter pipelines, especially when the flow does not need to be adjusted for a long time.
4. Petroleum, natural gas, chemical and other industries: In petroleum, natural gas, chemical, metallurgy, electric power and other industries, gate valves are used to transmit fluids and control equipment.
2. Gate valve material: According to different application requirements, gate valves can be made of a variety of materials. Common materials are:
1. Carbon steel gate valve: used in general low-pressure and medium-pressure environments, with good strength and wear resistance. Commonly used in water and general fluid pipelines.
Materials such as: WCB (carbon steel), WCC (low alloy steel).
2. Stainless steel gate valve: has excellent corrosion resistance and is suitable for chemical media and high temperature environments. - Materials such as: 304, 316, 316L, stainless steel alloys, etc.
3. Alloy steel gate valve: suitable for higher operating temperatures and more severe environments, with stronger corrosion resistance and wear resistance. - Materials such as: F5, F11, F22, etc.
4. Cast iron gate valve: Cast iron gate valves are often used in low-temperature and low-pressure water, steam, air and other fluid pipelines. - Materials such as: gray cast iron (GG), ductile iron (GGG).
5. Copper alloy gate valve: used for special corrosion resistance requirements, such as seawater or environments containing corrosive media. - Materials such as aluminum bronze, copper-nickel alloy, etc.
6. Plastic gate valve: such as polypropylene (PP), polyethylene (PE), etc., used for chemically corrosive media, but generally limited to low pressure and low temperature environments.
7. Ceramic gate valve: mainly used in extremely special environments, with extremely high corrosion resistance and wear resistance. The material selection of the gate valve should be determined according to the type of fluid, the temperature and pressure of the working environment to ensure the performance and service life of the valve.