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Sanitary applications

Sanitary applications
44Pages

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Pharmaceuticals Food Biotechnology Cosmetics Sanitary applications

Alexander Wiegand, Chairman and CEO, WIKA As a family-run business acting globally, with over 9,300 With manufacturing locations around the globe, WIKA is a worldwide leader in pressure and temperature Every year, over 50 million quality products, both standard highly qualified employees, the WIKA group of companies measurement. The company also sets the standard in the measurement of level, force and flow, and in calibration technology. Founded in 1946, WIKA is today a strong and reliable partner for all the requirements of industrial measurement technology, thanks to a broad portfolio of...

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Electronic pressure measuring instruments 18 Mechanical pressure measuring instruments 22 Electrical temperature measuring instruments 26 Mechanical temperature measuring instruments 32 Level measuring instruments 34 Calibration technology and service 42 In the manufacture of food and pharmaceuticals, safety in production and the prevention of any risks to those using the finished product is of the highest priority. In the chain of all the process components within a plant, measurement technology plays a key role. Measurement technology delivers process-specific...

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The hygienic design of plant components in contact with products is an essential prerequisite for avoiding microbiological contamination, and with that, ensuring product quality. As part of the overall hygienic concept of a plant, the measuring instruments used must comply with special requirements on material, surface quality, process safety, connection engineering and cleanability in the scope of the CIP process. As a company member of the European Hygienic Engineering and Design Group (EHEDG), WIKA contributes to the international standards and combines hygienic design with high-quality...

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Hygienic design Electropolishing By using electrolytic polishing, the cleanability of the surfaces can be improved. In this way, essentially, the topographical structure of the surfaces is smoothed and therefore the roughness is decreased. A further advantage is that electropolishing increases the passive layer of stainless steel, and thus the corrosion resistance is improved, especially with reducing media.

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Sealing materials In the selection of suitable sealing material, various process parameters and also the process media are important. Sealing materials must be toxicologically harmless and sufficiently resistant to abrasion, be resistant against aggressive cleaning and disinfecting media, and be stable in superheated steam at high sterilisation temperatures. Predominantly, special compounds are used for O-rings or form seals, for example fluororubber-based (FKM) such as VITON®, ethylene-propylene-diene material (EPDM) or poly-tetra-fluoro-ethylene (PTFE). The materials used for the sealing...

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Hygienic design Process connections Process connections which are used in CIP-capable equipment should not constitute any risk in respect to cleaning. They are characterised by the following features: ■■ A defined compression of the sealing element through a metallic stop ■■ Centring via a cylindrical guide ■■ Crevice-free sealing on the inside of the pipe For this, there are connections such as those in accordance with DIN 11864, NEUMO BioConnect®, BioControl® and VARIVENT®. The widely used connections in accordance with DIN 11851 (milk thread fitting) and DIN 32676 (clamp) were originally...

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Case The design of the non-wetted parts must be made so that the equipment is easy to clean from the outside as well. Particularly with open processes in food production, the machinery and equipment must be cleaned after production. For this, WIKA has developed specific hygienically designed cases. These are easy to clean from the outside. Without any gaps or corners and with a high IP protection, these are especially suited to the harsh conditions of washdowns.

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Hygienic Design Hygienic design Directives and standards WIKA combines hygienic design with high-quality measurement technology. We actively participate in international standards committees such as EHEDG, 3-A and ASME BPE. The latest market requirements flow into our product development. FDA (Food and Drug Administration) EHEDG (European Hygienic Engineering & Design Group) 3-A Sanitary Standards, Inc. NSF (National Sanitation Foundation)

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Connection to the process with diaphragm seals The connection of pressure measuring instruments to the process is ideally performed by means of diaphragm seals with hygienic connections. Diaphragm seals Advantages of diaphragm seals Diaphragm seals separate the pressure measuring In contrast to ceramic principles, with diaphragm seals - medium and ensure a process connection which is either - additional sealing elements are eliminated, and so the instrument, pressure sensor or pressure switch from the free of dead spaces or where dead spaces are reduced to a minimum. The isolation is...

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Possibilities for combination and assembly The combination of mechanical or electronic pressure measuring instruments with flush diaphragm seals meets the stringent demands made on hygienic instrumentation and is suitable for even the most difficult measuring requirements. Assembly of the diaphragm seal to the measuring instrument may be made via a direct connection, for high temperatures via a cooling element or via a flexible capillary. Pressure switches System fill fluids for diaphragm seal systems We use FDA-compliant media as system fill fluids between diaphragm seals and measuring...

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Diaphragm seals Diaphragm seals are mounted to existing fittings. Usually the fittings consist of T-pieces which are integrated into a pipeline, or of welding sockets which are welded to a pipeline, the process reactor or a tank. Diaphragm seals offer the advantage that the “contact surface” between pressure medium and diaphragm is relatively large, thus ensuring accurate pressure measurement. Furthermore, they can be easily removed for cleaning or calibration. Pressure measuring instrument (pressure gauge or transmitter) System fill fluid Direct mounting Diaphragm seal Diaphragm (welded to...

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Sanitary applications 44Pages

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Sanitary applications
44Pages