The valves used to restrict air flow are mainly the following:
1.Throttle Valve
Function: Accurately control air flow by adjusting the valve opening.
Features: Simple structure, suitable for occasions requiring stable flow regulation (such as pneumatic systems, experimental equipment).
2.Needle Valve
Function: Use a tapered needle to finely adjust tiny flows and provide high-precision control.
Features: Suitable for laboratories, instruments or precision systems that require slow adjustment.
3.Butterfly Valve
Function: Restrict air flow by rotating the valve plate, often used in large flow pipelines.
Features: Fast opening and closing, suitable for occasions that require frequent adjustment but low precision requirements (such as ventilation systems).
4.Globe Valve
Function: Adjust the flow by lifting the valve core, which can be completely closed or throttled.
Features: Good sealing, but large pressure loss, suitable for medium and low pressure systems.
5.Control Valve
Function: Link with sensors or control systems to automatically adjust flow or pressure.
Features: Commonly used in industrial automation, such as HVAC systems and factory air line control.
6. Check Valve
Function: Only allows one-way air flow, and automatically closes in the reverse direction to limit backflow.
Features: Not used for active throttling, but can indirectly limit the flow in the non-target direction.
7. Pressure Reducing Valve
Function: Indirectly limit the flow by reducing the downstream pressure to maintain a stable output.
Features: Suitable for scenarios that require constant pressure air supply (such as pneumatic tools).
Selection suggestions:
Precision adjustment: Prefer needle valves or throttle valves.
Large flow control: Butterfly valves or stop valves are more suitable.
Automation system: Regulating valves are used with sensors.
Backflow prevention: Check valves are a necessary choice.
Note: The selection of valves needs to take into account pressure, flow range, medium characteristics (such as humidity, cleanliness) and installation environment.
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