B3-KH-7B t c Shaft seals see page onwards For details Bevel-helical gear reducer B3

Flender/Flender Gear Units/Bevel-helical gear reducer B3

rocedure for tunnel drying of cherries. Additionally, vacuum drying of cherries in sugarsolution up to nal moisture content of 5% produces special types of decorative cherryproducts. Drying of Fruits, Vegetables, and Spices 6 4.1.4 Berries For most berry fruits such as strawberries, raspberries, blueberries, cranberries, gooseber- ries, and currants, sun drying is not very practical. The structure of the fruits, especiallythe skin, poses problems for drying. But this difculty can be easy overcome by using, for example, freeze drying or its modications. For example, freeze drying of strawberries consists of cooling the fruit to just above the freezing point of water, then slowly freez-ing the water to develop larger crystals that expand and rupture the structure of fruit,and nally freeze drying the fruit to below 3% moisture content (. Perforation of theskin of frozen blueberries ( increases the freeze drying rate signicantly and improvesquality. The high cost of freeze drying is strongly limiting factor; less expensive methods are continuously being developed. Cranberries, for example, may be tunnel dried aftersome prehandling, which consists of slicing the berries or perforating them. The dryingof such fruits for 6 at temperature of 7 yields product of about 1% moisture content (..). The unit load of the trays in tunnel dryer is about 5 kg/ 2. Another nal product, with moisture content of 5% (..), is normally achieved after the second dryingstep of the tunnel predried berries, which normally takes place in bin dryer (. The dry product may be additionally pressed and then packed into cans, cartons, etc. Explosion pufng is also sometimes used for the drying of whole berries (Table as well as other methods described previously. More recently, two-step drying process,with osmotic dehydration for the rst stage and air, vacuum, or freeze drying for thesecond stage, has been developed (. The main advantages of this process are sig-nicant energy saving