Needle Valves: The Unsung Heroes of Flow Control

1
Understanding Needle Valves How They Work and
Their Applications

• In this presentation, we will explore the world
  of needle valves, unsung heroes in regulating the
  flow of liquids and gases. We will delve into
  their design, functionality, and applications
  across various industries.

2
The Art of the Needle Design and Functionality

• The name reflects its key feature a slender,
  tapered plunger (needle)
• Rotating the handwheel turns the stem, screwing
  the needle in/out of the seat
• Raised needle creates space for controlled flow,
  lowered needle restricts flow

3
Beyond the Basics Key Components of a Needle
Valve

• Valve Body houses internal components and
  provides connection points for fluid flow
• Packing seals around the stem to prevent leakage
• Seat precisely machined surface for a tight seal
  when the needle is fully seated
• Handwheel/Handle user interface for operating
  the valve by rotating the stem

4
Applications Where Needle Valves Shine
Laboratory Equipment precise flow control for
experiments (chemicals, gas flow, pressure)
Medical Devices regulating oxygen flow
(respiratory therapy), controlling intravenous
drips
Chromatography controlling flow rates of liquids
and gases for separating components in a mixture
5
Advantages and Considerations

• Considerations
• Pressure drop fine control mechanism can cause
  pressure drop
• Limited flow rates generally not suitable for
  high-flow applications

• Advantages
• Simple operation easy to use with a handwheel or
  handle
• Durability robust materials withstand demanding
  environments

6
Conclusion

• Unassuming design, meticulous functionality
• Plays a vital role in numerous industries
• Ensures precise medical procedures

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