In front of the furnace for a rapid quench is a (W)3,400mm x (L)3,800mm x (D)3,950mm tank holding 51,000 litre of water with high velocity agitation jets. The volume of water is calculated to prevent the water from exceeding 50°C from a starting temperature of max 20°C water temperature when quenching a 5.3 tonne load of castings including the tray from 1,250°C. The water is vigorously agitated from two sides and from below using a multi-jet, high velocity agitation to break down the water vapour barrier and increase heat transfer between the casting and the quenchant. The agitated water is circulated by two 30kW pumps at 108ltr/sec, positioned in an underground service pit and controlled by variable speed drive controlling the quench jet intensity. The system incorporates a circulation pump and a sealed cooler capable of a cooling capacity of 370kW. Water at 50°C is capable to return to the quench at 15°C with an ambient temperature up to 32°C. The water is pumped through the plate exchanger where it is cooled then back to the quench tank.
The quench tank holds 51,000 litre of water with high velocity agitation jets.