LBT-DTR-01 Single-Item Combustion Test Chamber for Building Materials or Products
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Description
Product Introduction:
This test apparatus is a specialized instrument designed to evaluate the fire‑response behavior of building materials or products (excluding floor coverings) in a single‑burner combustion test, thereby determining their intrinsic physical properties. The apparatus complies with the national standards’ requirements for test conditions and operates in accordance with the prescribed test procedures (methods).
Key features:
1. Includes a dust removal system;
2. Standard configuration includes a stainless steel combustion chamber, eliminating the need for users to construct dedicated buildings (a brick-and-concrete combustion chamber can also be built on-site, though it cannot be relocated as a whole in the future).
Introduction to the System Composition:
The DTR-01 single‑specimen combustion test apparatus for building materials and products comprises a control system, a combustion chamber, a specimen‑holding carriage, a burner, a flue and exhaust system, an analysis and measurement system, and a dust‑removal device.
The long and short‑wing test specimens (building materials) are fixed in an L‑shape to the cart, which is then pushed into the combustion chamber. The fan is started, and the volumetric flow rate in the flue gas duct is adjusted to the specified range via a variable‑frequency drive. The auxiliary burner located away from the specimen is ignited to determine its heat release rate; the auxiliary burner is then shut off, and the main burner is ignited using fuel gas at the same mass flow rate. During a 20‑minute test, the heat release, smoke production, lateral flame spread, and the emission of burning droplets and particulate matter from the building material are calculated and evaluated.
Composition and Equipment of the Test System
1. Combustion Chamber: The combustion chamber measures 3.0 m × 3.0 m × 2.4 m, with walls constructed from a steel frame, gypsum board, calcium silicate board, or materials classified as Class A according to EN 13501‑1. 1 or A 2 Other types of panel materials at this level have been constructed. One wall of the combustion chamber is equipped with an opening measuring 1,470 mm in width and 2,450 mm in height. Additionally, windows are provided on two opposing walls directly facing the front surfaces of the vertical test panels. To facilitate proper adjustment of the SBI apparatus and the specimens once the trolley is in position, a door is also installed. After the trolley is positioned within the combustion chamber, the distance between the surface of the long‑wing specimen that contacts the U‑shaped slot and the wall of the combustion chamber is (2.1 ± 0.1) m; this distance represents the perpendicular separation between the long wing and the wall it faces. The total area of the combustion chamber’s openings—excluding the air inlet at the base of the trolley and the exhaust openings in the fume hood—shall not exceed 0.05 m². 2。
2. Flue and Exhaust System: This section comprises a fume hood, exhaust ductwork, measurement pipelines, and an exhaust fan. The measurement pipelines feature a double‑walled design with thermal insulation, fully complying with relevant standards to ensure the accuracy of data measurement and acquisition. Along the exhaust ductwork, sensor arrays are installed to measure temperature, light attenuation, O₂ and CO₂ concentrations, and differential pressure. The collected data are processed and evaluated, and a 3.5 kW centrifugal induced‑draft fan is employed, reliably meeting the required air velocity and flow rate for the tests.
3. Combustion System: The combustion gas is high-purity commercial propane. A mass flow controller precisely regulates the propane supply, while a solenoid valve manages the delivery of the fuel gas. High-frequency electronic ignition and an automatic spark igniter are employed, with an optional flame detector to verify successful ignition. In addition, the equipment is equipped with comprehensive safety features. First, all components responsible for the delivery and control of the combustible gas are housed in a separate explosion-proof enclosure, ensuring independent isolation.
4. Analysis and Measurement System
1) Oxygen and Carbon Dioxide Analyzer: This analyzer is a critical measurement component of the system, with accuracy fully meeting the requirements of relevant standards. It is directly mounted in the control cabinet, and its measurement data are displayed on an LCD screen, providing intuitive readings and ease of operation. The instrument’s rear panel is equipped with a dedicated calibration port, facilitating convenient post‑installation calibration by the user.
2) Pipeline pressure is measured using a pressure transmitter, pipeline gas temperature is measured with a thermocouple, and the combustion chamber’s temperature and humidity are monitored by an integrated temperature–humidity transmitter.
3) Smoke Density Analyzer: This analyzer consists of an illumination unit and a light‑receiving unit. It determines the smoke density within the duct by measuring the degree to which the emitted light is attenuated by the smoke present. The instrument is equipped with an automatic calibration program, enabling on‑demand calibration to further ensure measurement accuracy.
5. Control System: Composed of a control cabinet and a microcomputer system, the entire unit is operated under computer‑based automatic control. The control software interface is shown below:
6. Installation dimensions of the device
Dimensions: 8,000 mm (length) × 6,000 mm (width) × 4,500 mm (height); room height should ideally exceed 4.8 meters.
Equipment power: AC 380V, 6 kW
Technical specifications:
| Project | Specifications and Parameters |
| System temperature measurement range | 0–400°C ±0.5°C |
| System differential pressure measurement range | 0–100 Pa (MAX) ±2 Pa |
| Smoke exhaust flow measurement range | 0.25 m³/s to 0.8 m³/s (MAX) ±1.5% |
| Gas flow control accuracy | <647mg ±10mg |
| Oxygen Analysis (Paramagnetic) | Measurement range: 16%–21%; response time < 12 s |
| Carbon dioxide (IR type) | Measurement range: 0% to 10%; linearity is greater than 1% of full scale. |
| Optical density measurement | Measurement range: 0%–99.9%, ±5% |
| Measurement of relative air humidity | Measurement range: 20%–80% ±5% |
| Fuel | Commercial-grade propane gas with a purity of ≥95% (provided by the user) |
| Power supply | AC380V/6KW |
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