Tirril H-5025 Multi-Purpose Laboratory Bunsen Burner

Overview

The Tirril H-5025 Multi-Purpose Laboratory Bunsen Burner is a precision-engineered gas combustion device designed for controlled thermal application in analytical, safety, and materials testing laboratories. Unlike standard Bunsen burners, the H-5025 implements a dual-flame-tube architecture grounded in the principles of laminar premixed combustion—enabling reproducible flame geometry, stable thermal output, and precise stoichiometric control over fuel-air mixing. Its primary operational domain includes small-scale flammability assessments per UL 94, ASTM D5025 (Standard Test Method for Determining the Ignition Temperature of Plastics), and related ISO/IEC 17025-compliant fire performance protocols. As a non-electric, manually regulated instrument, it delivers consistent radiant and convective heat flux without reliance on external power, making it suitable for Class I, Division 1 hazardous location environments when installed per NFPA 54 and local gas code requirements.

Key Features

• Die-cast alloy body with electroless nickel plating—provides exceptional resistance to thermal cycling, oxidation, and corrosive byproducts from incomplete hydrocarbon combustion.
• Serrated gas inlet interface ensures leak-tight connection to standard propane regulators (CGA 780) and minimizes vibration-induced disengagement during extended operation.
• Two independently configurable flame tubes: a short 9.5 mm × 20 mm tube optimized for localized high-intensity heating; and a longer 100 mm × 125 mm tube engineered for uniform flame envelope distribution in horizontal flame spread tests.
• Integrated flame stabilizer—a machined aluminum collar with radial orifices—suppresses flame lift-off and flashback under variable gas pressure (0.5–2.5 bar inlet), maintaining laminar flow characteristics across ±15% supply pressure fluctuations.
• Fixed primary air aperture eliminates user-dependent adjustment drift, ensuring inter-laboratory repeatability in flame color, temperature profile (measured at 950–1100 °C for blue flame, ~650 °C for luminous yellow), and ignition delay time.

Sample Compatibility & Compliance

The H-5025 is validated for use with solid polymeric specimens (films, foams, molded parts), textile substrates, and composite laminates per ASTM D5025, ASTM D635, UL 94, and ISO 5657. Its flame geometry meets the dimensional tolerances specified in Annex A1 of ASTM D5025 for ignition source calibration. The burner is supplied with documentation traceable to NIST-traceable gas flow calibrations and undergoes factory verification against ANSI Z21.21-2022 for gas appliance safety. It supports GLP-compliant test execution when paired with calibrated thermocouples (Type K, 0.5 mm sheath), digital timers (±0.1 s resolution), and certified propane (≥99.5% purity, <5 ppm sulfur).

Software & Data Management

The H-5025 operates as a standalone mechanical instrument with no embedded electronics, firmware, or software dependencies. All operational parameters—including gas pressure, exposure duration, specimen orientation, and flame standoff distance—are recorded manually or via external data acquisition systems compliant with 21 CFR Part 11 (when used in pharmaceutical GMP settings). Laboratories implementing electronic lab notebooks (ELNs) such as LabArchives or Benchling may log H-5025 test sequences using structured templates aligned with ISO/IEC 17025 clause 7.7 (result reporting) and ASTM E2500 (verification of test methods).

Applications

• Ignition temperature determination of thermoplastics and elastomers per ASTM D5025.
• Horizontal and vertical flame propagation testing per UL 94 HB, V-0, V-1, and V-2 classifications.
• Calibration of radiant panel igniters and pilot flames in cone calorimeter setups (ASTM E1354).
• Controlled pyrolysis initiation in microscale combustion calorimetry (MCC) sample preparation.
• Thermal stress screening of adhesives, coatings, and encapsulants prior to accelerated aging studies.
• Validation of flame-retardant additive efficacy in R&D formulations for wire & cable, automotive interiors, and aerospace composites.

FAQ

Is the H-5025 compatible with natural gas?
No. The H-5025 is calibrated and certified exclusively for industrial propane (C₃H₈) with Wobbe index 49.5–51.2 MJ/m³. Natural gas substitution requires revalidation per ASTM D5025 Annex B and physical modification of the orifice plate—voiding warranty and regulatory compliance.
Does the burner require electrical power?
No. It is a purely pneumatic device with no electrical components, sensors, or ignition system—ignition is performed externally using a spark lighter or pilot flame.
What maintenance intervals are recommended?
Inspect gas pathways quarterly for carbon deposition; clean flame tubes ultrasonically in isopropyl alcohol biannually; verify nickel plating integrity annually via visual and eddy-current surface assessment per ASTM E309.
Can the H-5025 be integrated into automated test rigs?
Yes—its standardized CGA 780 inlet and rigid mechanical interface allow integration with programmable gas manifolds, robotic specimen handlers, and vision-based flame monitoring systems, provided all modifications comply with ASME B31.8 and local authority AHJ requirements.
Is calibration certification included with shipment?
Each unit ships with a Certificate of Conformance (CoC) referencing ASTM D5025 Section 6.2 verification, including measured flame height (25 ± 2 mm), inner cone length (18 ± 1.5 mm), and gas consumption rate (3.2 ± 0.1 L/min at 1.2 bar). NIST-traceable calibration reports are available upon request.