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cpp SPECIAL POWTECH Filling systems for hazardous areas Tough performers The semi-automatic FSL-PRO S filling system from Bizerba manufactures flammable, corrosive, foaming or highly viscous liquids without any problems. This flexible all-round system ensures to-the-gramme filling and weighing accuracy as well as gentle dispensing in hazardous areas. Picture: Bizerba The filling operation at the end of a production line can be performed by a semi- or fully automatic system. The only difference between them has to do with container handling. In semiautomatic systems, containers are manually fed and positioned in the filling station, while the filling process itself is done automatically. In fully automatic facilities, on the other hand, the containers are automatically conveyed from a magazine to a separation unit and the filling station before being transported onward. The product itself can be fed to the facility either gravimetrically from elevated tanks or by pumps. Semiautomatic systems are often the most economical solution for small batches. The container is first of all placed manually on a weighing platform. A movable filling valve then allows the filling nozzle to be lowered into the container. A more sophisticated so - lution is required for containers that must be filled and weighed while standing on a palet. In contrast to single-container filling stations, where the containers must be positioned underneath the filling valve, the The semiautomatic FSL-PRO S filling system ensures to-the-gramme filling and weighing accuracy as well as gentle dispensing in hazardous areas valve must instead be positioned above the container. Apart from potential time savings, this also eliminates the hard labour required for palletising heavy containers. Safe even in hazardous areas In sensitive areas such as the chemical or paint industry, particularly tough systems are vital because flammable, poisonous and corrosive substances are quite common in this kind of environment. All components of a filling system should be designed for highly sensitive products and hazardous areas. To offer maximum protection, the entire filling process can also take place within a protective enclosure. This highly safe approach additionally lends itself to applications with high hygiene requirements, including the pharmaceutical and food sectors. The semiautomatic FSL-PRO S filling system ensures appropriate filling and weighing even of goods with difficult processing characteristics (e. g. flammable, corrosive or foaming substances). Amongst other things, it can be used for highly sensitive liquids in the paint and varnish, chemical, petrochemical, construction material, pharmaceutical and food industries. As a flexible all-round system, it ensures to-the-gramme filling and weighing accuracy as well as gentle dispensing in hazardous areas (Ex zones 1 and 2). It is also in conformity with Atex guidelines. Products can be filled into different containers. The use of multiple valves enables fast product and container changeovers without any risk of cross-contamination, thereby providing maximum flexibility and reducing downtime. www.cpp-net.com Online search: cpp0317bizerba Hall 3, Booth 531 32 cpp 03-2017
Dosing and shut-off valve with pneumatic sealing element Ideal for use in Atex areas The DKZ 103 APS and DKZ 110 APS rotary valves are based on the continuously optimised butterfly valves in the centric APS series from Warex. The shut-off function involves the sealing element being pneumatically pressed against the valve disc. This technology offers several advantages. The APS (Air Pressure Sealing) system ensures that in the closed position, the entire circumference of the seal is uniformly inflated to adapt to the full circumference of the disc. This technique provides a number of advantages in terms of both pressuretight shut-off and low-friction, materialfriendly operation. Several different versions (diameter, speed, density of medium) are available. The customer benefits from a product that is optimally designed for the task at hand thanks to specific feature options relating to the material and drive type. Depending on the sealing material which is selected, the application temperature range extends from -40 to +200 °C. If the medium being transported is expected to reach a temperature of 130 °C or more, for example plastic granules or products and raw materials in the food sector, silicone seals are used. Rotary solutions with metallic sealing can be supplied for even higher temperatures. Although pressure tightness cannot be ensured here, most granules are unable to pass through due to the small gap size. BVS 03 Atex H024 X N6 type examination. Another application for this rotary valve is in vacuum transport systems. Depending on the thickness of the material being transported, the piping is either partly or, in the case of free-flowing products, completely filled. The rotor delivers uniform portions right up to a full flow in the 22° position. The chemical and pharmaceutical industries as well as food processing are just a few of the many potential uses. The intelligent design of the rotary valve allows various relatively small, and therefore energy efficient, drives to be mounted. A distinction is made between (pneumatically operated) 180° pendulumtype drives, which always provide half the capacity of one full revolution of the rotor, and electric drives. Electric drives enable the rotor revolutions to be set precisely to match the dose rate. Thanks to the low installation height and compact design, this rotary valve can also be incorporated into existing systems in a space-saving way, so that refitting or upgrading becomes an attractive option. www.cpp-net.com Online search: cpp0317warex Hall 4, Booth 391 Wide range of applications Wear occurs both at the rotor and in the interior of the butterfly valve seal, especially with abrasive media. Soft-sealing rotary valves are thus a reliable choice in this area because abrasion is partly compensated by the inflatable seal. In fact, material loss is fully compensated up to a certain degree of wear because the highly adaptable cuff still provides reliable sealing. The maintenance and repair intervals are significantly longer than with conventional methods, ensuring greater economy. A further advantage is that the seals are normally interchangeable. The DKZ 103/110 APS rotary valve is ideal for use in hazardous areas in accordance with the Picture: Warex Valves Warex rotary valves with an inflatable seal are based on the APS centric butterfly valve cpp 03-2017 33
