Hygienic class valve, as the name suggests, refers to the food standards (pharmaceutical or sanitary standards) valve, the valve body must meet the sanitary standards of stainless steel, all mirror polish, polish and cleanliness corresponding to the exposure of the environment must meet the sanitary standards, meet the sanitary standards of the valve components, mainly for the food industry, pharmaceutical industry, hospital clean zone, sanitary requirements for very high cases of bea
Types of sanitary class valves:
The sanitary class valve itself valve body material as well as sealing materials have requirements, the material mainly uses stainless steel, valve seat seal should be non-toxic material, such as hard seal for stainless steel, soft seal for rubber (temperature up to 140°C usually used ethylpropylene) fluorinated rubber, rubber is toxic and can not be used). More common sanitary grade valves are: sanitary grade butterfly valve, sanitary grade ball valve, sanitary grade check valve, sanitary grade solenoid valve, sanitary grade valve.
Requirements for mechanical sealing of sanitary class valves:
1 Compliance with GMP requirements;
2, surface finish greater than 1.6;
3, contact surface can be realized on-site cleaning, on-site disinfection;
4, transition surface, no deposits;
- Outside of the sealed surface, there is a design to prevent looping.
Sanitary grade ball valve is designed for fully covered valve seat, no retention, high cleanliness, can meet CIP SIP requirements for sterilization and cleaning, temperature resistance 180℃, pressure 10 bar, sanitary grade ball valve provides many connection ends to choose from, clamp connection, welding, extended welding, etc. D. Different cover connection methods can be selected on the same valve.
Differences between sanitary and conventional valves:
By type, hygienic class valves have higher production standards, which are mainly designed for some biofermentation plants and have particularly high requirements for the purity of the valve flow. Sanitary grade valves and media contact parts mainly use stainless steel, the material is generally 304SS or 316 stainless steel, that is non-toxic and harmless, clean and smooth surface does not produce corrosive and precipitating materials, production and processing after special processing, in many ways the valve industry can not be compared, that is cleanliness, easy installation method, etc. D. It is food, pharmaceutical and other industries producing special valves.
Industrial valves are generally based on the requirements of the conditions of use to develop models, many of which are used in high temperature and high pressure conditions, widely appreciated mechanical engineering, metallurgy, petrochemical, chemical industry, urban construction and other industries, with long service life and flexible operation and other characteristics. The appearance and interior do not have smooth and beautiful hygienic grade valves, but in many places can not be replaced by sanitary grade valves.