Specially designed for corrosive and hygienic environments, the CRDH and CDN pneumatic drives from Festo fulfil the requirements laid down by the industries that place great demands on cleanliness.
Beer brewing in accordance with German tradition, which has been regulated since 1516 by cleanliness requirements, is a case in point. The required mixing of water, hops and malt under strict hygiene conditions is entirely analogous to a variety of processes suitable for the application of Festo's CRDH and CDN pneumatic drives.
The cleaning of a production system is a necessary process in the daily running of a manufacturing operation. However, the longer the washing process lasts, the longer production is at a standstill. The Festo CRDH and CDN drive units have been designed to minimise downtime. Functional exterior surface features make them fully resistant to contamination and fluids. These capabilities have been tried and tested under aggressive and ambient conditions and have proved to be impervious to corrosion and contact with organic and/or inorganic substances as well as chemical products. The materials used in their design coupled with their easy-to-clean surfaces promote a long service life.
Festo's CDN is an optimised ISO/VDMA standard cylinder with an enclosed, smooth aluminium profile, distinguished by its curved outer surfaces. This makes it difficult for anything to stick to it. Economy and ease of cleaning are further enhanced through the integration of various functions. Optional sensors - available as reed switches or electronic sensors - are integrated into the profile, and are included as standard equipment. Large radii, no recess or gaps and a higher corrosion resistance, mean that the CDN is ideal for splash zones where it comes into contact with foodstuffs (that do not then enter the main product flow). The cylinders are also suitable for application in host of other industries where intensive cleaning is required.
The CRDH is a high-end product for aggressive environments. Its stainless steel cylindrical design with exemplary corrosion resistance is uncompromisingly equipped for demanding applications such as food production zones, as specified by the European Standard EN 1672-2.
Minimised dirt traps and optimised surface quality prevent the accumulation of media, bacteria and micro-organisms. As a favourable consequence, this reduces cleaning time, and thus downtime, to a minimum, and maximises economy. Various cover and bearing types, as well as different wiper materials and variants mean that the CRDH is versatile.
Cleaning agents made by leading manufacturers have been tested by Festo and approved for use with the CDN and the CRDH. In fact the CDN can even withstand the short-term action of cleaning agents at 100°C.
For more information contact Richard Teagle, MD, Festo, 011 971 5500.
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