Cutting disc for vegetable chopper FIMAR PZ7

A gas burner safety disc acts as a thermal fuse in professional hobs and ranges. When the flame fails, the disc cools and contracts, shutting off the gas supply to prevent leaks. This mechanical safety device relies on precise thermal expansion: the metal disc is calibrated to deform at a set temperature, breaking the gas flow until the appliance is manually reset. The system is simple, requires no electricity, and responds faster than electronic sensors, making it a standard safety feature in commercial kitchens where open flames are used continuously.

The PZ7 disc is installed beneath the burner head, where it sits in direct contact with the flame. During normal operation, the heat keeps the disc expanded, allowing gas to flow. If the flame extinguishes—whether from a gust of wind, a spill, or a drop in gas pressure—the disc cools within seconds, snapping shut to cut the supply. The operator must then relight the burner manually, ensuring the fault is investigated before restarting.

Constructed from a temperature-sensitive metal alloy, the disc is 7 mm in diameter. Its small size allows it to fit into compact burner assemblies without altering the hob's footprint or requiring modifications to the gas line. The disc is a single-use component: once triggered, it must be replaced, as the metal deforms permanently to ensure the safety mechanism remains reliable.

This spare part is compatible with FIMAR professional gas hobs and ranges that specify the PZ7 disc. It is listed under catering equipment spares for gas safety components.