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Needle Valve

A needle valve is a type of valve used to precisely control the flow of fluid or gas in a system. It is named for its slender, tapered, needle-like plunger that fits into a similarly shaped seat. This design allows for fine adjustments and precise flow regulation, making needle valves ideal for applications requiring accurate flow control.

Key Features of a Needle Valve:
1. Precision Control: The needle-like plunger allows for very fine adjustments to the flow rate.
2. Small Flow Rates: Suitable for systems requiring low flow rates or where flow must be controlled with high accuracy.
3. Sealing: Provides a tight seal when fully closed, preventing leaks.
4. Durability: Often made from materials like stainless steel, brass, or other alloys to withstand high pressure and corrosive environments.

Components of a Needle Valve:
- Body: The main housing of the valve.
- Needle (Stem): The tapered, needle-like plunger that moves in and out of the seat to control flow.
- Seat: The opening where the needle fits to regulate flow.
- Handle or Knob: Used to manually adjust the position of the needle.
- Bonnet: The part that connects the body to the handle and seals the valve.

Applications of Needle Valves:
- Hydraulic Systems: For precise control of fluid flow.
- Fuel Systems: In engines or gas lines to regulate fuel flow.
- Laboratory Equipment: For accurate flow control in experiments.
- Instrumentation: In pressure gauges and other measuring devices.
- Cooling Systems: To control coolant flow in industrial or automotive systems.
 
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