UL790 Roof Material, Fire Resistance Performance, Photovoltaic Cell Flame Retardant Performance Tester

Applicable scope:
These requirements cover all roof materials exposed to simulated fires outside the building, used for installation on combustible or non combustible substrates. It is to evaluate the fire resistance performance of the roof and components under simulated real conditions, and to evaluate the AC level of the samples under A1.82m, B 2.4m, and C 3.9m conditions. It can also be used for flame retardant performance testing of photovoltaic cell modules.
Compliant with standards:
UL 1730: Smoke detectors for independent living units in multi household residential and hotel/motel rooms. Monitor: Electric signal to detect residential smoke and dust conditions;
UL 790: Standard test method for fire resistance testing of roof coverings;
IEC 61730-2 Photovoltaic Module Appendix A Fire Test Flame Propagation;
ASTM F 108-04: Standard test method for fire resistance testing of roof coverings;
NFPA 256: Fire resistance testing of roof coverings;

Performance parameters:
Using cylinders to control the slope of the deck
Fireproof board with testing deck attached
Using automatic control valves to regulate temperature in stages
Plywood roof covering material, size 1300 (W)×1000 (D)×120 (H) for installing test samples;
Non combustible testing board, installed at the end of the testing board, can prevent the occurrence of tempering under the testing board;
Stainless steel fan-shaped adjustment plate, adjustable testing angle, size: 1440 (L) x 940 (H) mm;
Non combustible panel assembly, installed at the front end of the frame, simulating eaves and eaves, extending flames from the burner to the specimen, with dimensions of 330 (W) x 2130 (D) x 584 (H) mm;
An independent exhaust duct that can extract air from outside the laboratory;
A honeycomb filter is installed in the air duct, and guide vanes are installed at the gas inlet;
A slope adjustment panel is installed on the ventilation duct to adjust the direction of air flow;
There is a guide plate attached to the ventilation duct, which can enhance the wind speed to ensure that the airflow supplied to the test plate is not affected by external interference. The guide plate is made of stainless steel and its position does not change with wind pressure changes;
The air duct material is made of stainless steel, which is corrosion-resistant and high-temperature resistant. The size is 2130 (W) x 762 (H) x 3000 (L) mm;
The fan is 220V, 50HZ, three-phase electric, equipped with a reverse system that can automatically adjust the wind speed, with a flow rate of 300m3/min;
Continuously variable speed reverse converter, adjustable from 0 to 100%;
Gas burner (used for intermittent ignition, flame propagation, and flying fire tests), 1.12m long, with a diameter of 60.3mm, and a narrow slit of 12.7mm (W) * 0.91m (L) on one side facing the test plate;
The gas burner can provide 22000Btu/min (387kWh) and can automatically adjust the gas flow rate according to three combustion levels A, B, and C;
A thermocouple is installed at 58.7mm above the top of the burner, which can test a temperature of 888±28℃;
Automatic ignition system, ensuring the safety performance of testing, ignition electrode high voltage is 1.8kVp mass flow controller;

Temperature automatic control system:
-Class A and B: 760±28℃ (1400±50℉) -21000~22000 Btu/min (369~387 kWh)
-Class C: 704±28℃(1300±50℉) -18000~19000 Btu/min (316~334 kWh). Different testing and control methods must be followed for each gas burner;

High precision pressure gauge and pressure regulating valve control gas pressure:
-LNG: The use of MFM can accurately measure the gas flow rate (the gas flow rate is controlled by an automatic control valve);
-LPG: Use inverter system to regulate air flow rate: Test the speed on the deck to be 19 ± 8 km/h (5.5m/sec);
Metal mesh supports the material, and the tray can rotate to facilitate full combustion of the material;