Apparatus for the thermal treatment of metallic products

An apparatus for the thermal treatment of metallic products, comprising

• a support and transport plane to place and forward a product to be treated;
• a collector module that comprises:
• a collector including a perforated plate on a side of the collector facing the support and transport plane;
• a conduit connected to the collector to feed the collector with a fluid, and
• at least two stop valves to feed a collector by a feeding circuit connected to the conduit and configured to permit or preclude the flow of the fluid into the collector and wherein upstream of the stop valves a proportioning valve is foreseen to regulate the flow rate inside the feeding circuit downstream of the proportional valve and wherein the proportioning valve feeds two stop valves for each collector;
• and
• wherein the stop valve is located at a distance from the collector that does not exceed 60 cm and that the perforated plate includes holes arranged in rows parallel to each other but not in parallel rows with respect to two opposite sides of the perforated plate, and wherein the rows are inclined with respect to the two opposite parallel sides of the plate at an acute angle (β).