DH-VW-4320 Large Combustion Test Chamber
The DH-VW-1300 large combustion test chamber is produced strictly in accordance with UL1581 section 1080.1~1080.14 standards and fully complies with VW-1 (Vertical specifications) Flame Test combustion test standards. Economically applicable and widely used in the wire and cable industry.

in detailParameters:
DH-VW-1300 Large Combustion Test ChamberThe entire experiment is conducted in a volume ofConducted in a 4.32 cubic meter sealed laboratory. Test method: Adjust the flame height, place the top of the flame under the specimen, burn for 15 seconds, extinguish for 15 seconds, repeat 5 times, and check the burning condition of the specimen. The combustion, extinguishing time, and repetition times can be set, and automatic operation can be performed. Suitable for VW-1 of UL1581, UL13, UL444, UL1655, as well as FT-1 and FT-2 of CSA.
Main reference standards:This experimental device meets the requirementsUL1581-2001 Section 1060 (Vertical Combustion and FT1 Test), 1080 (VW-1 Combustion Test), 1090 (Horizontal Combustion Test for Electrical Wires), and 1100 (Horizontal Sample/FT2 Combustion Test) requirements.
DH-VW-1300 Large Combustion Test ChamberTest box
（1) This test box adopts an aluminum alloy frame+electrolytic plate electrostatic spraying, which has a beautiful appearance and is resistant to corrosion
Characteristics of rust and corrosion prevention
（2) The top of the box is equipped with a strong ventilation and smoke exhaust system, which is installed simultaneously with the air supply system upon completion of the test
Open, can discharge exhaust gas outdoors; During the experiment, this system was in a closed state.
（3) There is a supply air door on the rear side of the box. At the completion of the experiment, when the exhaust system is turned on, it flows into the box
During the air supply and testing process, this enclosure needs to be closed.
（4) The front of the box is equipped with a tempered glass observation window that can be sealed during the testing process, making it easy to observe and test
Check the situation.
（5) There is a device under the glass observation window that allows you to extend your hands and arms into the test chamber for operation
The hole is equipped with sealed gloves, and the operator uses the sealed gloves to operate the combustion torch.
（6) Test box volume specification: effective space 2.4m (length) * 1m (width) * 1.8m (height),
Volume:4.32m3. Dimensions: 2.4m (length) * 1m (width) * 2.5m (height).
DH-VW-1300 Large Combustion Test Chambertemperature measuring system
（1) Thermal sensors (copper conduits and thermocouples) - The conduit structure should be electrolytic with extremely high conductivity
Copper. Count Reg19.14±0.02mm
（2) K-type thermocouple, equipped with a 0.5mm diameter stainless steel tube as the outer jacket.
（3) The digital Tai Shi thermometer from Taiwan matches the K-type thermocouple imported from the UK. The reading is greater than 1000 ℃.
（4) The entire testing system is active, and it is placed in the test box for temperature measurement.
（5) Equipped with an electronic stopwatch: * * up to 0.1S (for backup during temperature calibration)
DH-VW-1300 Large Combustion Test ChamberExperimental apparatus and fixtures
（1) Main fixtures: test bracket and combustion spray lamp
（2) Test bracket: made of stainless steel, divided into horizontal bracket and vertical bracket independent, namely FT1, FT2
VW-1 has three specifications. The vertical bracket and the plane where the spray gun is located are parallel to the observation window plane, making it easy to observe and operate.
（3) Combustion nozzle (UL1581 designated nozzle): meets the requirements of ASTM D 5025-99, standard power: vertical nozzle is 500W, horizontal nozzle is 225W, nozzle diameter is 0.90 ± 0.03mm, nozzle length is 1.60 ± 0.05mm, nozzle height from air inlet is 102mm; nozzle angle: horizontal is 90 degrees, vertical is 20 degrees (the longitudinal axis is kept on a vertical plane and forms an angle of 20 ° with the vertical direction)
（4) Wedge frame: Add wedges, and the spray nozzle should be installed on the wedges, which should be easy to move and able to be moved back to the specified position.
（5) Equipped with a set of rulers that can measure the internal and external flames during horizontal and vertical combustion.
（6) Equipped with a steel ruler ranging from 500mm * * to 1mm for testing purposes.
DH-VW-1300 Large Combustion Test ChamberFlow control system:
（1) Mainly including: flowmeter, pressure reducing valve, back pressure pipe
（2) Flow meter: flow range 1000ml/min
（3) Combustion pressure reducing valve: 1, capable of regulating gas flow to 10 pounds per cubic inch
（4) Back pressure tube: water column height accuracy to 5mm or below
（5) Back pressure fluid: red oil or green oil
DH-VW-1300 Large Combustion Test ChamberTiming system and cumulative combustion system
This experimental device provides three timing systems: combustion frequency, combustion timing, holding combustion timing, and delayed combustion timing. The functions of the three timers are as follows:
Burning timer: When the burning blowtorch reaches the designated position, it automatically records the spraying time (set according to regulations: such as burning)15S）， Tester
By observing the set time, when the spraying time reaches the instant, the hand quickly rotates the wedge frame and moves away the spray gun.
Holding timer: When the above combustion timer is reached, this timer automatically counts; If the fire supply is stopped within the specified time (e.g15S）， This process
If the flame of the burned sample is extinguished, then perform * * combustion again and repeat the * * step combustion process.
Delay ignition timer: If it is not extinguished within the specified time in the previous step, manually start another delay ignition timer, such as within the specified delay ignition time
Extinguish, then repeat the * * step combustion test. If it fails to extinguish within the specified time, the test is directly judged as failed.
It can automatically record the number of burns to avoid errors and is equipped with corresponding buzzing alarm sounds (optional).