Barrel Body: Volume Capacity 0.1-500 mL, Length 10-300 mm

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

Parameter	Typical range	Notes & selection driver
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

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 7886-1, ISO 11040-4, DIN 13080, ASTM E438

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.

View Product Details

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

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Barrel Body

Manufacturer profiles associated with Barrel Body.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Barrel Body