![]() ![]() Such pumps are also called progressing cavity pumps and can be selected for large clearances of the cavities ds between the turning center rotor and the housing. A single screw pump is best for moving food with large pieces without disintegration. Actually, pumps sometimes are used to do just this, but, generally, disintegration is a change that can best be controlled with specialized equipment other than pumps, and pumps should be chosen primarily for their pumping efficiency. ![]() Although such a pump would be effective for moving liquids and pastes, it would chew up chunk-type foods, reducing them to purees. For reasons of mechanical efficiency, with this type of pump, close clearances between the gears and housing are essential. the inner gears rotate, sucking food into the pump housing and subsequently squeezing food out of the pump housing. One common type is a rotary gear pump (see external gear pump in Fig. There are many kinds of pumps and the choice depends on the character of the food to be moved. One of the most common operations in the food industry is the moving of liquids and solids from one location or processing step to another by pumping. Food plant operators generally call on detergent manufacturers for expertise in establishing highly effective cleaning procedures since these further depend on detergent concentrations, temperatures of application, order of application where more than one cleaning aid is used, and other variables. 5.2, along with the properties that affect their cleaning efficiency. Strong alkaline and neutral detergents find wide application in the food industry. Strong acids are highly corrosive to several metals, fabrics, wood, rubber, and concrete floors. Alkaline films and hard-water scales may require mildly acid detergents. Many types of soil can be removed with mildly alkaline detergents, but strong alkali may be required for more tenacious-deposits and heavy deposits of fats and oils or built up protein deposits. The cleaning of equipment, as well as a facility’s walls and floors, must take into consideration the chemical and physical properties of both the surface to be cleaned and the type of soil. Just as different food materials require special cleaning, the surface of food processing equipment need thorough and frequent attention. ![]()
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