Vacuum Vertical Pit-Type Annealing Furnaceis controlled by three parts of the furnace:upper,medium and lower.The actual process temp of the hearth. Rubber seals the outlet of the hearth and the water-box unit is supplied.There is a jacket of air between circulating water and the wall of the hearth to reduce the hot loss.Besides the following specifications,the factory manufactures other size hearth and furnace body TYpepower(kW)Power supplyRated tempeffective size of the hearthweight of materialvoltage (V)phaseRJ-75-9753803950Φ700×1200700KgRJ-90-9903803950Φ800×12001000KgRJ-120-91203803950Φ800×15001200KgRJ-150-91503803950Φ800×18001500KgRJ-180-91803803950Φ800×20001500Kg