Vertical Flame Tester – Automated flame resistance test on cables according to UL 1581 and UL 2556

ZONSKY's Vertical Flame Tester provides automated, highly accurate testing to determine how wire insulation behaves when exposed to fire.

Product applications: Engineered specifically to verify the flame resistance of wire and cable insulation materials. Measures critical safety metrics: ignition time, flame spread rate, and self-extinguishing capabilities.

Key features: Fully automated operation that streamlines your workflow by automatically tracking burning times, extinguishing times, and repetitive test cycles. Designed to deliver fast, highly repeatable data while minimizing manual operator error.

Complies with standards: UL 1581-2016 Section 1061 – Vertical Burning Test of Wires; UL 1581-2016 Section 1090 – Horizontal Burning Test of Equipment Wires; UL 2556-2015.

Main technical parameters:

• Vertical combustion box: UL1581 standard size, internal dimensions: 305 × 355 × 610 mm.
• Horizontal combustion box: UL1581 standard size, internal dimensions: 305 × 355 × 610 mm.
• Vertical spark nozzle: 20° angle, equipped with gas control valve.
• Horizontal spark nozzle: 90° angle, equipped with gas control valve.
• Operation mode: Manual and automatic mode selection.
• Automatic stop function: Stops automatically when the preset time is reached.
• Fuel type: Methane gas (provided by the customer).
• Test length: 300 mm (horizontal), 457 mm (vertical).

Test method (vertical test): The specimen is placed on top of the flame, burned for 15 seconds, extinguished for 15 seconds, and repeated five times to assess burning conditions.