Precision Fire Testing for Flooring Materials
We are pleased to introduce the DX8401 Radiant Heat Flux Test Apparatus, a purpose-built laboratory instrument for evaluating the fire performance of flooring materials exposed to an inclined radiant heat field. Engineered for testing laboratories, flooring manufacturers, and third-party certification bodies, the DX8401 delivers repeatable, standards-compliant data on how floor coverings respond to a small flame and thermal radiation under controlled conditions.
Standards Compliance You Can Report With Confidence
The DX8401 is designed and manufactured to fully satisfy GB/T 11785-2005 and ISO 9239-1 — “Reaction to fire tests for floorings — Part 1: Determination of the burning behaviour using a radiant heat source.” Every critical parameter, from radiant flux distribution to duct velocity, is verified against the tolerances defined in these standards, so results can be submitted to customers, notified bodies, and regulators without additional justification.
Wide Application Range
The apparatus is suitable for testing virtually all horizontal flooring materials ignited by a small flame and exposed to an inclined radiant heat field, including:
- Textiles and carpets
- Cork board and wood flooring
- Rubber and PVC / plastic floor coverings
- Sprayed and coated flooring systems
Because the test evaluates the complete flooring assembly, any change in backing material, underlay, or substrate is captured in the result. This gives manufacturers a reliable way to compare formulations, validate incoming materials from suppliers, and support declaration of performance documentation.
Technical Specifications
| Parameter | Specification |
|---|
| Heat flux meter range | 0 – 15 kW/m² |
| Heat flux meter accuracy | ±0.2 kW/m² |
| Heat flux meter precision | < ±3% |
| Thermal radiation pyrometer | 400 – 600 °C, ±0.5 °C |
| Black body temperature error | ±5 °C |
| Exhaust velocity | (2.5 ± 0.2) m/s |
| Exhaust capacity | 39 – 85 m³/min, stepless adjustable |
| Radiant panel | Porous refractory, 300 mm × 450 mm, ~900 °C service |
| Panel inclination | 30°, adjustable |
| Flux distribution | 200 mm: 9.1 ± 0.4 kW/m² / 400 mm: 5.0 ± 0.4 kW/m² / 600 mm: 2.4 ± 0.2 kW/m² |
| Thermocouples | Type K, 3.2 mm stainless steel sheathed |
| Pilot burner | OD ø10 mm, ID ø6 mm, 35 holes of ø0.7 mm |
| Flame height | 60 – 120 mm, adjustable |
| Ignition | High-voltage electronic ignition |
| Fuel gas | Propane, (0.026 ± 0.002) L/s, supplied by user |
| Cooling water | 15 °C – 25 °C |
| Burn chamber size | L1420 × W1200 × H2300 mm |
| Control cabinet size | L × W × H: 2.2 × 1.2 × 2.4 m |
| Power supply | AC 220 V ±10%, 50 Hz, max. 5 kW |
| Net weight | Approx. 350 kg |
Engineering Highlights
- Computer-controlled operation: automatic timing (accuracy better than 1 s/h), data processing, recording, and printout for traceable reports.
- Imported heat flux meter: delivers accurate radiant flux readings across the full 0 – 15 kW/m² working range.
- Nine-point flux verification: the radiant panel is checked at nine positions to ensure uniform flux distribution as required by the standard.
- Stable exhaust system: a steplessly adjustable fan holds duct velocity at (2.5 ± 0.2) m/s, then clears combustion gases from the laboratory after each test.
- Robust construction: the burn chamber and control cabinet are fabricated from 1.2 mm 304 stainless steel on CNC equipment with a smooth, rounded profile; the pilot burner is made in-house from 304 stainless steel to exactly meet GB/T 11785 requirements, and all remaining fittings use 304 stainless or thickened, electroplated A3 steel for lasting corrosion resistance.
Why Flooring Fire Performance Testing Matters
Floor coverings are among the first surfaces exposed in a building fire, and their contribution to flame spread directly affects evacuation time and property loss. Regulators in Europe, the Middle East, Southeast Asia, and China increasingly require documented reaction-to-fire data before flooring products enter a project. With the DX8401, manufacturers can generate that data in-house, shorten certification cycles, screen new formulations quickly, and answer technical questions from specifiers with hard evidence rather than estimates.
Ordering and Technical Support
The DX8401 is delivered with a burn chamber and control cabinet, ready for installation and commissioning. Our engineering team supports factory acceptance testing, operator training, and calibration guidance so your laboratory can begin testing within days of delivery. Contact us for a tailored quotation, delivery lead time, and documentation package for your market.
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