Classification And Characteristics Of Laboratory Gas Valves

Laboratory gas valves are essential components in laboratories, used to control the flow of gases. Gas valves can be categorized into various types based on their purpose, structure, and material.

Classification by Application
1. Stop Valve: Primarily used to cut off or start gas flow, they are typically installed at the inlet and outlet of pipelines to ensure safe system operation.

2. Regulating Valve: Used to adjust gas flow and pressure to meet the precise gas supply requirements of the laboratory.

3. Safety Valve: When system pressure exceeds the set value, the safety valve automatically opens to release excess pressure, protecting laboratory equipment and personnel.

Classification by Structure
1. Gate Valve: The gate valve's opening and closing member is a disc, which moves perpendicular to the flow direction. The movement of the disc controls gas flow by raising or lowering the disc.

2. Stop Valve/Ball Valve: The stem axis of a stop valve is perpendicular to the valve seat sealing surface. The valve is opened or closed by rotating the handwheel. A ball valve is opened and closed by rotating the ball 90 degrees.

3. Butterfly Valve: The opening and closing element of a butterfly valve is a disc-shaped disc that rotates around its own axis within the valve body, thereby opening, closing, or regulating the valve.

Classification by Material
1. Stainless Steel Valve: Offers excellent corrosion resistance and high-temperature resistance, suitable for a variety of harsh environments.

2. Copper Valve: Offers excellent thermal conductivity, suitable for applications requiring heat dissipation.

3. Plastic Valve: Lightweight and affordable, suitable for low-pressure, low-temperature applications.