Secret Seducers

 Scent and aroma are important selling points for consumers. For 45 per cent of consumers, aroma is the most important decision-making criterion when buying food and drink, according to a study by the market research firm AC Nielsen.
 Our own preferences change over the course of our lives: when we are young, we often prefer sweet tastes, but later we also like salty ones. Only after a lot of experience and once we are older do we also try sour or even bitter tastes such as coffee, Parmesan, blue cheese or dark chocolate. As we age, the bitter taste stimulates our appetites. These age-specific inclinations are very important for new product designs in the aroma industry.
 The industry is also pinning great hopes on the growing popularity of healthier nutrition. This is because, along with fat and sugar, food producers are also banning important flavourings from their products. Additives from aroma manufacturers ensure that healthy products retain the familiar flavour for consumers, even though they are low-fat or low-calorie versions. With other foods, unpleasant side effects can be reduced.

 Applications in the scent and aroma industry
 When it comes to manufacturing aromas, it's all about the highly accurate dispensing of low-viscosity scent and aroma components using gear pumps from Maag Pump Systems. These constantly and precisely transport the scents with a pressure differential of 1 bar directly from a reactor. Two factors are crucial: the mixture of the individual components and the right ratio. The exact quantities of the individual components that are blended in the mixing process determine the quality of the product. They are regarded as key control variables. For this reason, highly accurate and low-pulsation stainless steel gear pumps from the cinox? series, or the heated version therminox?, are used for this process.
 The stainless steel shafts and bearings made from synthetic carbon guarantee superlative resistance. Often, sliding bearings made from carbon are used for liquid, aqueous and low-viscosity media. Along with its special properties and ability to offer excellent resistance against acids and other corrosive media, carbon also offers excellent emergency running properties. This means that it can be safely used with low-viscosity media and used for all kinds of cleaning cycles.

 Remembering thermal expansion
 Generally speaking, the components' different thermal expansion parameters need to be taken into account. Carbon exhibits virtually no expansion when heated. For this reason, the hole in the bearing needs to be sufficiently large right from the start to ensure that the bearing doesn't shrink onto the shaft when it expands. This is safeguarded by Maag with play classes that are selected on an application-specific basis.
 For very runny, watery media, it is very difficult to achieve an acceptable volumetric level of efficiency, since the degree of efficiency of the gear pump depends greatly on the axial play between the bearings and the shafts. To nevertheless boost efficiency, the play is kept very small (single-digit μm for small pumps). This depends heavily on the different temperature coefficients of the materials used to make the housing, shafts and bearing.

 The influence of temperature on viscosities
 A rising temperature also reduces the viscosity of the transport medium. This has a negative effect on the lubricant film on the bearings, for example. What's more, the teAdidas