How to choose the fluid handling system of a pump in a modern food processing plant, the designers and the operators and managers of these devices face various health-related responsibilities that are beyond the scope of conventional industrial product manufacturing. Since the consumer of the final product is the public, product contamination must be avoided, corrosion is not allowed, and cracks and dead spots in the pump and piping that can cause fluid retention and bacterial growth are unacceptable.

In addition to material selection and choice of food contact surfaces during processing, the food industry must also select pipelines and tank equipment for the delivery of acidic and alkaline cleaning fluids during system maintenance, as well as the use of corrosion to meet various environmental standards. Sewage treatment equipment for sex chemicals.

Pumps required for food applications cannot be chemically reacted with the product or affect the taste, color and other characteristics of the product in any way. Non-food contact fluid equipment design factors include reduced maintenance and downtime, increased production and reduced costs, as well as many undetermined factors related to supplier knowledge and services.

One use causes another use

Interest in plastic pumps began more than 50 years ago when a Vanton flexible linear screw pump was built to meet the stringent requirements of pumps in heart/lung surgery. The unique but simple structure of this original pump limits the fluid to only two basic components: a solid plastic pump body and a rough synthetic rubber molded lining. It solves two major problems associated with the treatment of human blood without polluting or affecting blood. First, it avoids all the dangers of metal contamination because the contact material does not contaminate or chemically react with the blood. Second, its gentle movement does not damage blood cells during blood delivery. Another reason this pump is accepted is its simple structure. It does not contain valves, seals, packing or gaskets. It is quick and easy to disassemble, clean and reassemble.

Since then, with the help of chemical manufacturers' giant avatars DuPont, Doyle, Atofina and other chemical companies, new fields have been developed. They are at the forefront of developing a wide range of thermoplastic materials for the treatment of corrosive chemicals: acids, bases, salts, solvents, and the like.

Advancing technology

Pump designers incorporate these new materials into the design of cost-efficiency pumps to meet the needs of the expanding processing industry. Today there are approximately 150,000 such flexible line pumps - with a total capacity of 40 GPM - used in the United States and approximately one in the number of pumps in Europe. In addition to the need to use these thermoplastic rotary screw pumps to handle a wide range of sensitive and corrosive fluids at low to medium flow rates, to handle the higher throughputs required by chemicals, food, pharmaceuticals and related processes and industrial enterprises. The requirement for non-metallic pumps is to adopt a new structure. Pump manufacturers responded to this request.

Thermoplastic centrifugal pump designs are currently available in horizontal and vertical configurations for flow rates up to 1500 GPM and head lifts up to 400 ft. They can be used continuously or intermittently at temperatures of 275 °F or slightly higher. They can be arranged in a model that conforms to the ANSI process pump standard and can be placed in an electromagnetically driven, non-sealing mechanism and automatic starter. The vertical pump has the ability to dry run and has a unique segmented shaft structure that allows a length of 50 ft. All of these types are used in the food industry because of their design and construction without metal components in contact with the fluid.