INDUSTRY COMPONENT

Plunger/Needle

Precision plunger/needle component for flow regulation in valve assemblies

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Component Specifications

Definition
A precision-engineered cylindrical component designed to regulate fluid flow through controlled linear displacement within a valve assembly. The plunger/needle features tapered or conical geometry that interfaces with a seat to create variable orifice sizes, enabling precise flow control in industrial applications.
Working Principle
Operates through linear actuation where the plunger/needle moves axially to create variable annular gaps between its tapered surface and the valve seat. This movement changes the flow area, allowing for precise regulation of fluid passage from fully closed to maximum flow positions.
Materials
Stainless steel (AISI 316/304), hardened tool steel (D2, A2), tungsten carbide, ceramic (Al2O3, SiC) for abrasive applications
Technical Parameters
  • Hardness 45-65 HRC
  • Taper Angle 30-60 degrees
  • Length Range 10-200 mm
  • Diameter Range 1-50 mm
  • Surface Finish Ra 0.2-0.8 μm
  • Temperature Range -40°C to 400°C
  • Operating Pressure Up to 1000 bar
Standards
ISO 5598, DIN 24342, ISO 4401

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Plunger/Needle.

plunger valve needle valve component flow control plunger industrial valve parts precision fluid control valve assembly components Plunger/Needle Plunger/Needle in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Valve Assembly

A precision fluid control mechanism that regulates the flow and dispensing of thermal paste in automated dispensing systems.

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Engineering Analysis

Risks & Mitigation
  • Wear and tear from friction
  • Corrosion in aggressive environments
  • Seizure due to thermal expansion
  • Cavitation damage
  • Contamination ingress
FMEA Triads
Trigger: Abrasive particles in fluid
Failure: Surface erosion and dimensional changes
Mitigation: Implement filtration systems, use hardened materials, apply protective coatings
Trigger: Improper alignment during assembly
Failure: Uneven wear and leakage
Mitigation: Use precision alignment fixtures, implement torque-controlled assembly, conduct leak testing
Trigger: Thermal cycling
Failure: Differential expansion causing binding
Mitigation: Select materials with similar thermal coefficients, design with appropriate clearances, implement temperature compensation

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.005 mm for critical dimensions, surface finish within ±10% of specification
Test Method
Dimensional verification with CMM, pressure testing per ISO 5208, material certification per ASTM standards, functional testing with calibrated flow meters

Buyer Feedback

★★★★☆ 4.9 / 5.0 (24 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Plunger/Needle meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Plunger/Needle arrived with full certification."

"Great transparency on the Plunger/Needle components. Essential for our Machinery and Equipment Manufacturing supply chain."

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Frequently Asked Questions

What is the difference between plunger and needle valves?

Plunger valves typically have straight cylindrical designs for on/off control, while needle valves feature tapered tips for precise flow regulation. Needle valves provide finer control with gradual opening characteristics.

How do I select the right material for plunger/needle components?

Material selection depends on fluid compatibility, pressure requirements, and wear resistance. Stainless steel offers corrosion resistance, tool steel provides durability, and ceramics handle abrasive fluids. Consider chemical compatibility charts and operating conditions.

What maintenance is required for plunger/needle components?

Regular inspection for wear, cleaning to prevent contamination buildup, lubrication of moving parts, and periodic replacement based on operational hours or cycle counts. Monitor for leakage and performance degradation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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