The Gadda group firstly produces different systems to perform high-quality controlled cooling for thermal treatments. According to customer needs, forced cooling chambers and/or quenching tanks are available. A forced air cooling station with exhaust hood can be integrated in the line and fed by an automatic loading machine. Internal air recirculation is engineered using computed fluid dynamics in order to optimize flow around actual load shape allowing fast and uniformed controlled cooling. Cooling rate can be controlled in feedback through inverter powered recirculation fan. Isothermal annealing treatment chamber are manufactured. When forced cooling is not needed, free air normalization stations with optional smoke aspiration and thermal shields are offered.

Water, water oil tanks are designed taking advantage of computed fluid dynamics in order to optimize flow around actual load shape. In detail different water flow direction solution (horizontal/vertical) with Kaplan duct fans or diffuser nozzles under the load are available. Quenching can be performed: with the load still sustained by the fully integrated loading machine also with the load deposited on trays submerged in the tank or using a dedicated elevator. As a result an automatic tank covering system can be installed for improved safety. Typical time to submerge load from furnace door opening is under 30 seconds. Water cooling is done with an external heat exchanger and cooling tower. Tank volumes range from 20 m3 to 400 m3.

Quenching tank with automatic elevator (30 tons) #1380

This innovative tank, which meets the AMS2750F pyrometric requirements, by design is supported by CFD analysis for the verification of the flows and speeds of the liquid around the pieces, and is built and installed by Gadda Group.

Here are its main features:
▪ Dimensions payload 6mx6mxh1,5m
▪ Elevator capacity 30.000Kg
▪ Tank volume 350 m3
▪ Flow direction: double horizontal and vertical flow according to the type of piece to harden.