The unit is used for crudeness milk tank, transformed milk tank, material blending tank(non-heating),temporary capacity tank,agitation tank,etc. and it is suitable for such fields as dairy,juice,beverage,medicine compound or bio-building project,etc. It has a consisting of inward canister body and external wrap layer,among which is hotness safeguarding material, with instigator on the highest point of the tank with a material of tank is great quality stainless steel. Its standard filling is quick open sort sewer vent and it is numeral sign sort temperature meter.