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LBT-1701 Fire-Resistance Stability Tester for Paper-Faced Gypsum Boards

It is used to determine the fire‑resistance stability of refractory gypsum boards and is also suitable for assessing the fire‑performance of other building materials, as well as decorative and interior‑finishing materials.

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Gypsum testing apparatus

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LBT-1701 Fire-Resistance Stability Tester for Paper-Faced Gypsum Boards

Description

Product Introduction:

It is used to determine the fire‑resistance stability of refractory gypsum boards and is also suitable for assessing the fire‑performance of other building, decorative, and interior‑finishing materials.

The specimen is drilled and conditioned under the specified environmental conditions. It is suspended between two flame nozzles by means of a support rod, with the nozzles positioned perpendicular to the specimen surface. Liquefied petroleum gas is used as the heat source to supply the two burners of the fire‑resistance testing apparatus, with the burner nozzles located 30 mm from the board surface. As prescribed by the standard, a load is applied to the lower end of the specimen, after which the burners are ignited. A thermocouple is used to measure the temperature at a distance of 5 mm from the board surface. During the initial phase of the test, any charred protective paper that falls onto the thermocouple must be removed without causing the specimen to vibrate. By adjusting the settings, the temperature is maintained within the range of (800 ± 30)°C over a period of 3 minutes, and this temperature is continuously sustained throughout the test. Timing begins when the specimen is exposed to the flame and continues until the specimen fractures and fails. The time at which each specimen is burned through is recorded, and the fire‑resistance rating for the group is taken as the minimum value among the five specimens, reported to the nearest minute.

Technical Specifications:

Parameter Description	Specific content
Control and Storage	Seven-inch touchscreen control, with the ability to store historical data.
Case material	All-stainless-steel chassis
Temperature control method	Dual thermocouple temperature measurement
Input voltage	220V
Dual-burner specifications	The inner diameter is Φ9.5 mm ± 0.5 mm, with a length of approximately 100 mm; it is equipped with an air‑adjustment nut measuring 10 mm; the flame‑tip diameter is (40 ± 1) mm, and the flame‑orifice diameter is (2.5 ± 0.1) mm.
Flame length	Adjustable within the range of 20 mm to 100 mm.
Flame duration adjustment	The application time and burn duration can be adjusted within the range of 0 to 99 minutes and 99 seconds.
Test Process Control	Automatic control of the experimental process
Test Recording Function	Automatic recording of combustion time upon specimen fracture
Gas Source Type	The gas supply for the test flame shall be natural gas or liquefied petroleum gas (it is recommended to use high‑quality fuel gas whenever possible).
Flow regulation range	100~1000mL/Min
Timing accuracy	0.1s
Test temperature	800±30℃, maximum temperature 900℃, accuracy class 1
Temperature stabilization time	<3 min (800±30)°C
Specimen specifications	300 mm (length) × 50 mm (width), with holes drilled 25 mm from each edge.
Suspension load	7, 10, 12, 15, 17, 20 N (converted to a suspended load of 0.75–2.5 kg)
External dimensions	700 (W) × 300 (D) × 600 (H) mm
Outer packaging dimensions	800 (W) × 420 (D) × 700 (H) mm

Installation Requirements Table: User-Provided

Space requirements	External dimensions	700 (W) × 300 (D) × 600 (H) mm
	Weight (kg)	About 30
	Test bench	A workbench with a length of no less than 1 meter and a width of no less than 0.75 meters.
Power Requirements	Voltage	220V±10%, 50Hz
	Power	180W
Water source		None
Air source		Liquefied petroleum gas (it is recommended to use gas of the highest possible quality)
Pollutant Description		Smoke and dust
Ventilation Requirements		The equipment must be placed inside a fume hood, or its exhaust gases must be collected and routed to a flue-gas treatment and purification system.
Required for other tests		Pressure-reducing valve for gas cylinders (adjustable to 0.3 MPa)

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★★★★★

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★★★★★

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LBT-1701 Fire-Resistance Stability Tester for Paper-Faced Gypsum Boards

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