Pneumatic Needle Valves are used to reduce the rate of flow in a leg of a pneumatic circuit, consequently slowing actuator speed. Unlike a Flow Control, a Needle Valve is bi-directional, meaning it controls flow in both directions instead of only one direction. A finely threaded stem allows the gradual adjustment of the amount of controlled flow passing through the valve. Flow enters the input port, travels through an orifice sized by the tapered stem and out the output port.
Pneumatic air valves are typically made from brass, bronze, steel or metal alloys and may also be anodized to provide corrosion resistance. Pneumadyne offers micro needle valves with various input and output port options and in a range of flow rates to meet your specific requirements. View our needle valve catalog for performance data and additional specs for our pneumatic needle valves.
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Needle Valves Are Used for A Range of Industry ApplicationsPneumatic needle valves are used as on and off valves and help control flow and prevent sudden pressure surges of gas and air that can damage gauges. They are also used for stopping flow in industrial equipment and for applications requiring precise flow adjustment. Additional applications for micro needle valves include:
- Gas flow control valves in vacuum systems
- Shut-off valves for pressure gauges
- Bleed valves in water heaters
- Metering valves for automatic combustion control systems
- On/off valves for throttling services
How to Select the Appropriate Needle ValveNeedle valves play an important role in regulating air flow, pressure and direction in your pneumatic system. Selecting the right micro pneumatic needle valve for your system will help ensure efficiency and prevent leaks and safety issues.
When selecting a Needle Valve for your pneumatic circuit, it is imperative that you know your flow rate requirements. The speed of the related actuator is dependent upon how quickly the actuator can be filled with air at the input and exhausted at the output. Additional considerations in selecting a pneumatic needle valve for include:
- Operating temperature of your application to ensure you select a material that is appropriate for your application’s environmental conditions
- Pressure rating for your pneumatic system to ensure you select a needle valve that provides a sufficient seal for high pressure operations
- Valve size to prevent connectivity issues that can cause leaks in your pipe systems