The viscosity range of sanitary-grade valves is very large, the use of environmental PH value 1~14, suitable for fresh milk, pasteurized milk, yogurt, color milk, juice, tea drinks, wine, ice cream, soy milk, milk drinks, longevity milk, jam, soy sauce products and other products sterile production, after the UHT sterilization system treatment of products in aseptic packaging, its quality or freshness can be maintained at room temperature for 3~6 months (without any preservatives added), free from refrigeration. It keeps purity and fresh for our sanitary valves.