Tank internal and external wall are made of international quality standards of sanitary 304 stainless steel, the Polyurethane insulation thickness between the inner and outer is 50-200mm. Conic bottom install inlet and outlet pipes. Tank installation cleaning system, tank roof device, tank bottom device, rotating wine outlet tube, inflatable device, liquid level meter, sampling valve and other supporting valves, equipped with temperature sensor, with the help of PLC auto-control, the equipment can reach to automatic and semi-automatic control. The height of conic bottom is quarter of the total height. The ratio of tank diameter and height of tank is a quarter of the total height. The ratio of tank diameter and height of tank is 1:2-1:4, the cone angle usually between 60°-90°.