INDUSTRY COMPONENT

Barrel Body

A precision cylindrical component in dispensing syringes that contains and guides fluid during controlled dispensing operations.

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Component Specifications

Definition
The barrel body is the primary structural component of a dispensing syringe, designed as a hollow cylinder with precise internal dimensions to house the plunger and contain the fluid. It provides the critical interface between the fluid reservoir and dispensing mechanism, ensuring accurate volume control, pressure management, and contamination prevention during pharmaceutical, chemical, or industrial fluid transfer applications.
Working Principle
The barrel body operates on the principle of positive displacement fluid dynamics. When the plunger moves within the barrel, it creates pressure differentials that force fluid through the nozzle. The barrel's precisely calibrated internal diameter and smooth surface finish ensure consistent fluid flow with minimal friction and accurate volumetric control.
Materials
Medical-grade borosilicate glass (ISO 4802), polypropylene (PP), polycarbonate (PC), or cyclic olefin copolymer (COC) for pharmaceutical applications; stainless steel 316L (ASTM A240) or PTFE-lined barrels for chemical resistance; material selection based on chemical compatibility, sterilization requirements, and transparency needs.
Technical Parameters
  • Length 10-300 mm
  • Surface Finish Ra ≤ 0.4 μm (glass), Ra ≤ 0.8 μm (plastic)
  • Pressure Rating Up to 10 bar (standard)
  • Volume Capacity 0.1-500 mL
  • Internal Diameter 1-50 mm (standard range)
  • Temperature Range -40°C to 200°C (material dependent)
  • Concentricity Tolerance ±0.02 mm
Standards
ISO 7886-1, ISO 11040-4, DIN 13080, ASTM E438

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Barrel Body.

dispensing syringe barrel precision barrel body medical syringe component fluid transfer cylinder pharmaceutical barrel industrial syringe part Barrel Body Barrel Body in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Dispensing Syringe/Barrel

The cylindrical container and delivery mechanism that holds and dispenses thermal paste in precise amounts.

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Engineering Analysis

Risks & Mitigation
  • Material incompatibility with dispensed fluids
  • Internal surface defects causing fluid retention
  • Dimensional inaccuracies leading to volume errors
  • Stress cracking from repeated sterilization
FMEA Triads
Trigger: Material degradation from chemical exposure
Failure: Cracking or leakage compromising fluid containment
Mitigation: Implement material compatibility testing and use chemical-resistant coatings
Trigger: Manufacturing defects in internal surface finish
Failure: Increased friction and inconsistent plunger movement
Mitigation: Apply statistical process control and 100% visual inspection
Trigger: Thermal expansion mismatch in multi-material assemblies
Failure: Seal failure at barrel-plunger interface
Mitigation: Design with compatible thermal expansion coefficients and tolerance analysis

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
ISO 2768-mK for general dimensions, ±0.5% of nominal volume for critical applications
Test Method
ISO 7886-1 for sterility and leakage testing, ASTM D4169 for shipping validation, USP <788> for particulate matter

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What materials are suitable for chemical-resistant barrel bodies?

Stainless steel 316L, PTFE-lined barrels, or fluoropolymer materials provide excellent chemical resistance for aggressive solvents and acids.

How does barrel precision affect dispensing accuracy?

Internal diameter tolerances directly impact volumetric accuracy; tighter tolerances (±0.01 mm) enable precision to ±0.5% of target volume in pharmaceutical applications.

Can barrel bodies be customized for specific applications?

Yes, customization includes material selection, internal coatings, graduation markings, luer lock fittings, and specialized dimensions for automated dispensing systems.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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