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TITLE:Food machinery in the pump structure and the materials how to choose

  How to choose a modern food processing devices pump fluid handling systems, design of these devices, as well as operators and managers are faced with a variety of health-related duty, the duty goes beyond the usual range of industrial products manufacturers. The final product because the public are the consumers, the need to avoid product contamination, corrosion is not allowed, pump and piping system in fluid retention and can make bacteria die cracks and is not acceptable.

     In addition to material selection and processing process of selection of food contact surfaces, the food industry must also select when system maintenance for the transportation of acidic and alkaline cleaning fluids pipeline and storage tank equipment, and environmental standards to meet a variety of selection of the use of corrosion Chemicals for water treatment equipment.

     Food requirements of the application of pumps, its material should not react chemically with the product or products in any way affect the taste, color and other characteristics. Fluid non-food contact equipment design factors, including reduced maintenance and parking time, increase productivity and reduce costs, as well as with suppliers of knowledge and a lot of service-related factors it is difficult to determine.

A purpose caused another purpose

     People interested in plastic pump start more than 50 years ago, when the manufacture of a spiral-shaped linear Vanton flexible rotary pump to meet the needs of the heart / lung surgery stringent requirements on the pump. This unique original pump but the structure of easy access to restricted fluid only two basic components: solid plastic pump body and rough synthetic rubber molded lining. It is non-polluting solution to deal with the impact of human blood or blood-related to two main problems. First, it avoids the risk of metal contamination of all, because of blood contact with materials which do not produce pollution or chemical reaction. Secondly, it sports a soft carrier in the blood does not harm the process of blood cells. This pump has been accepted by the other reason is its simple structure. It does not contain valves, seals, gaskets or packing. Its demolition and re-cleaning quick and easy assembly.

     Since then, manufacturers in the chemical giants like DuPont, Dow, Atofina and other chemical companies with the help of new areas being opened up. They used to deal with corrosion in the development of chemicals: acids, alkalis, salts, solvents, such as the large-scale on the forefront of hot plastic material.

Advance technology

     Designer pumps put into these new materials cost - the design of pump efficiency to meet the growing demand for the processing industry. Today there are about 150,000 such Units Flexible linear pumps - the total capacity of 40GPM - in the United States, but also in Europe there is around double the number of pumps in use. In addition to the need to use these hot plastic screw-shaped pump rotating at a low velocity flow conditions to the deal from a wide range of sensitive and corrosive fluids, the in order to deal with chemicals, food, medicine and related processes and requirements of industrial enterprises in the higher transmission flow requirements of the non-metallic pumps are the introduction of a new structure. Pump manufacturers to respond to the request.

     Hot plastic centrifugal pump design can be obtained at present there is a horizontal and vertical forms of structure, can be used for the flow of 1500GPM, head up to 400ft, at a temperature of 275 ¡ã F or higher may be continuous or intermittent use. They can to comply with the ANSI process pump layout models can be arranged in the electromagnetic drive without sealing and automatically activated device. Vertical pumps have the ability to do run and there is a unique structure of its sub-axis to permit the length of 50ft. All of these types can be used in the food industry, because of its design and structure of Fluid does not contact the metal components.

Typical applications

     Viscous mustard and vinegar-ching

     Lo flexible linear-shaped rotary pump and allow it to deal with clear viscous fluid of 6000SSU, and slurry particles have uniform fluid. In this device, the clearance of vinegar to the ground level storage, and then use the pump into a storage tank above the floor. And it is a result of gravity flow of ingredients cans, cans of ingredients to add mustard seeds and salt. These mixed ingredients into a mixing / mixed cans, made of mustard products are pumped into a hopper and into the moving conveyor belt on the bottle.

     August Barer & Sons Inc. request to install the pump at 50PSI of pressure and viscosity conditions 5000SSU to deal with the flow 10GPM. Only two components into contact with corrosive fluids. They are all plastic. Thicker part of the life of polypropylene pump body are infinite, because it does not react with foods and its smooth interior also reduce wear and tear. Flexible synthetic rubber lining does not react with the food but will be lining wrinkle removing part of the Products, in particular fluid contains abrasive powder when. The company provides a service reports that deal with this kind of pump-ching vinegar in its first 20 years of operation need to be replaced only once lining. Viscous mustard treatment even though the pump asked a regular basis and plans to replace the lining, which can be used at the scene a few minutes to complete, without the need for special tools.

Dairy processing and its environment

     In dairy products such as milk, cream, yogurt, ice cream, tofu, juice and the production of a lot of sweets, a lot of washing equipment for the treatment of corrosive chemicals in many ways similar to the entire industrial sector of these chemicals treatment. Emissions into the air or local water system or wastewater system shall be in accordance with the dirt of environmental norms in the request, pay attention to this point is also very important. These requirements must be carefully selected on the structure and manufacture of materials to ensure that these pumps can resist the corrosive and abrasive fluid characteristics, and the fluid after use can be completely emissions, but also to ensure that after the cleaning job they do not deal with contamination of food.

     Tuscan Dairies is a larger area of the United States dairy processors, request the production of the end of every day after washing. Tuscan standards require washing steps and the demolition of fluid handling systems, cleaning, re-installed the equipment used. This process is the use of alkali and acid solutions, as well as various chemicals in the waste water before the flow of wastewater systems and more quickly. Flexible linear pumps are suitable for all kinds of chemicals transported to storage tanks and put them in the row from the tank out. Can be used for this synthetic rubber linings have seven kinds of materials can be used to pump body has four kinds of materials.

     Scotland at a modern dairy plant in line with the requirements of the local water agencies are faced with various problems. The emergence of these problems are because there is sulfuric acid wastewater treatment system to help waste into the milk / water condensation. This pH value of waste regulation and very strict control requirements. English Steill process design is to solve the problem of the dairy plant:

     In order to ensure that chemicals used in corrosion resistance to the complete, all access to the pump fluid homogeneous components are the use of polypropylene, and it does not happen because the chemical reaction of a large range of pH values.

For the water / milk and the sulfuric acid treatment, to meet the requirements of pumps Vertical centrifugal pump Vanton provisions of Sump-Gard, the pump has plastic drainage riser hot and has the same rules to strengthen the material. Pump casing, casing cover and impeller from molded from pure polypropylene. Shen bearings including ceramic or Teflon with ceramic sleeve and outer sleeve. Stainless steel shaft sleeve of the same material.

     Treated waste water for the pumps is to meet the requirements of vertical centrifugal pump Vanton provisions of Sump-Gard, the pump casing, casing cover, flange and impeller are molded from polypropylene homogeneous, drive bearing a large open area of the seal in order to simplify the repair, but there is a contraction of the front axle bearings so that the overhanging part and deformation to a minimum.