The concept and use of sanitary pump
Sanitary pump concept:
Sanitary centrifugal pumps are classified according to the use occasions of the pump, which specifically involves the transportation of all products in contact with the human body, such as pharmaceuticals, dairy products, beverages, food, cosmetics, food additives, fine chemicals, etc.
From the perspective of the pump material, the sanitary negative pressure pump must be 316L stainless steel; there is no sanitary dead corner in the pump cavity, which can be cleaned online by CIP; the sealing material is food-grade materials, such as nitrile rubber, fluorine rubber, ethylene propylene rubber, and Teflon Wait;
From the perspective of pump types, centrifugal pumps, rotor pumps, self-priming pumps, shear pumps, screw pumps, etc., as long as they meet the above requirements, they can all be called sanitary pumps. The impeller of the centrifugal pump must be an open impeller to be a sanitary pump in the true sense.
From the perspective of industry standards, sanitary pumps must obtain 3A in the United States and EHEDG certification in Europe, and the materials must meet FDA standards.
This series of pumps are single-suction, single-stage, centrifugal sanitary pumps, suitable for conveying various liquids such as milk and wine, and are indispensable conveying equipment in the food, chemical and pharmaceutical industries. The highest temperature used for single machine seal is about 120 degrees, and the highest temperature used for double machine seals is 150 degrees. Among them, high-lift pumps are particularly suitable for tube sterilization, yogurt temperature holding equipment, CIP cleaning and other systems with high resistance.
Sanitary pumps are also known as centrifugal beverage pumps, milk pumps, and stainless steel beverage pumps. They are suitable for conveying milk and other colloidal liquid foods. The maximum temperature of the suction material is 70-80 ℃. This pump is a single suction and fully enclosed type. Centrifugal pump.
Working principle and performance:
Sanitary pumps must pay attention to improving the reliability and life of electric pumps. Pay attention to the appearance quality of submersible electric pumps and gradually enter the international market.
Submersible electric pumps have obvious price competitive advantages in the international market. In particular, it is necessary to improve the appearance quality of submersible electric pumps, and to give users a sense of beauty, so that more domestic submersible pumps can enter the international market as soon as possible.
Therefore, due to the submersible electric pump itself and the pump station that selects the submersible electric pump, there are many advantages. In the future, my country's demand will continue to grow, with the following main development trends.
Generally, the cost can be reduced by 40`%, and the construction period can be shortened 1/22/3
1. Development of large and medium-sized submersible electric pumps. Large and medium-sized submersible electric pumps have the outstanding advantages of simplifying pump structure and saving investment in pumping station construction. It will be more and more widely used in municipal administration, industry and mining, environmental protection, and industrial and agricultural water supply and drainage. It is expected that the demand will be greater in the future. For example, pumps with cutting devices, multi-stage pumps, and submersible electric pumps for pumping corrosive media are still very few.
2. Development of multi-functional and multi-purpose submersible electric pumps. Compared with the products of famous foreign submersible electric pump manufacturers, the form of my country's submersible electric pumps is not enough. However, its market demand is very large, so it has a very good future for development. Two single-end mechanical seals are used.
3. Development of high-reliability mechanical seals Mechanical seals are a key part of submersible electric pumps. In this way, the pressure of the medium can act on the end face, and the leakage direction is internal flow. These are all advantageous but the structure is slightly more complicated. The oil chamber is equipped with a double-end mechanical seal, and the end faces on both sides should adopt different structure types, so that the pressure of the medium can act on the end face on the lower side, otherwise only the spring force is used, and the reverse thrust of the seal end face will easily open the end face. Therefore, further research on the structure and materials should be carried out to improve its reliability and lifespan. All these information should be applied to the submersible electric pump as soon as possible.
4. New materials, new technologies, and new processes will be gradually applied. Ordinary pumps have used stainless steel, fluoroplastics (F46 lining plastic, rubber lining, sprayed ceramics, etc.). Expand the application fields of submersible pumps. And computer-aided design, auxiliary manufacturing and auxiliary testing, etc. The application of new technologies and new processes is also imperative. Facts have proved that the application of new technologies, new materials and new processes not only liberates labor productivity, sanitary pumps, but also ensures stable and reliable product quality.
