INDUSTRY COMPONENT

Needle

Precision needle component for fine flow regulation in needle valves

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Component Specifications

Definition
A precision-machined tapered needle component used in needle valves to provide accurate flow control by creating a variable orifice when moved relative to the valve seat. The needle's conical shape allows for gradual flow adjustment from fully closed to fully open positions with high resolution.
Working Principle
The needle operates on the principle of variable orifice restriction. As the needle is threaded into the valve body, its tapered tip progressively restricts the flow passage through the valve seat. The fine threads allow precise axial positioning, enabling accurate flow rate control through the annular gap between needle and seat.
Materials
Typically manufactured from corrosion-resistant materials: 316 stainless steel (most common), brass, Monel, Hastelloy, or titanium for specialized applications. Hardness: 35-45 HRC for wear resistance. Surface finish: Ra 0.4-0.8 μm for sealing surfaces.
Technical Parameters
  • Length 20-100 mm
  • Tip Radius 0.1-0.5 mm
  • Taper Angle 30-60 degrees
  • Thread Pitch 0.5-1.5 mm
  • Diameter Range 3-25 mm
  • Pressure Rating Up to 6000 psi
  • Temperature Range -40°C to 400°C
Standards
ISO 5208, DIN 3356, ASME B16.34, API 602

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Needle.

needle valve component flow control needle precision needle valve needle industrial needle fluid control component Needle Needle in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Needle Valve

A precision flow control valve that uses a tapered needle to regulate fluid passage through an orifice.

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Speedometer

An instrument that measures and displays the instantaneous speed of a vehicle.

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Tachometer

An instrument that measures and displays the rotational speed of an engine's crankshaft in revolutions per minute (RPM).

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Engineering Analysis

Risks & Mitigation
  • Thread galling
  • Tip deformation
  • Corrosion pitting
  • Seat wear
  • Leakage due to improper seating
FMEA Triads
Trigger: Improper material selection for corrosive media
Failure: Corrosion and pitting of needle surface
Mitigation: Use corrosion-resistant alloys matching fluid chemistry; apply protective coatings
Trigger: Excessive tightening force
Failure: Thread stripping or needle tip deformation
Mitigation: Implement torque control during assembly; use thread lubricants
Trigger: Particulate contamination in fluid
Failure: Scoring of sealing surfaces leading to leakage
Mitigation: Install upstream filtration; use hardened materials for needle and seat

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.01 mm diameter, ±0.5° taper angle, Ra 0.4 μm surface finish
Test Method
ISO 5208 leakage testing, dimensional verification per ASME Y14.5, material certification per ASTM standards

Buyer Feedback

★★★★☆ 4.9 / 5.0 (9 reviews)

"The Needle we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."

"Found 17+ suppliers for Needle on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Needle is very thorough, especially regarding technical reliability."

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Frequently Asked Questions

What is the main function of a needle in a needle valve?

The needle provides precise flow regulation by creating a variable orifice when moved relative to the valve seat, allowing accurate control of fluid flow rates.

Why are needle valves preferred for fine flow control?

Needle valves offer superior flow control resolution due to the fine threads and tapered needle design, which allows gradual adjustment with minimal flow changes per rotation.

What materials are commonly used for needle manufacturing?

316 stainless steel is most common for corrosion resistance, with alternatives including brass, Monel, Hastelloy, and titanium for specific chemical or temperature requirements.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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