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WIKA Alexander Wiegand SE & Co. KG
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Diaphragm seals mnnn •uuuu Part of your business
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Our knowledge for your success Alexander Wiegand, Chairman and CEO, WIKA Part of your business WIKA is a global market leader in pressure, temperature and level measurement technology, with an annual turnover of over 800 million euros. Working together with our customers, we develop comprehensive solutions based on our highquality measurement technology components, with the solutions ultimately being integrated into their business processes. Excellence in technology and service Our leading position in the world market is based on various factors: As a family-run company with a rich...
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Diaphragm seal models ■ With flange connection 8 ■ With threaded connection 11 ■ With sterile connection 12 Diaphragm seals By using diaphragm seals, pressure measuring instruments can be adapted to even the most difficult of conditions within process industries. A diaphragm made of the appropriate material separates the medium from the measuring instrument.
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Operating principle Diaphragm seals are mounted to existing connections, which are welded to a pipeline, a process reactor or a tank. The internal space between the diaphragm and the pressure measuring instrument is completely filled with a system fill fluid. The process pressure is transmitted by the elastic diaphragm into the fluid and from there to the measuring instrument. A diaphragm seal and its components are perfectly matched to each other to ensure a reliable measurement. Diaphragm seals offer the advantage that they can be easily dismounted, e.g. for cleaning or calibration...
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Technical information Combinations with measuring instruments WIKA diaphragm seals can be connected to almost all pressure gauges, process transmitters, pressure switches or pressure sensors. Mounting may be made via a direct connection, a cooling element or a capillary. The combined systems can withstand a pressure of 10 mbar up to 3,600 bar at extreme temperatures (-130 … +400 °C) and with a wide variety of media, thus enabling accurate pressure measurements under extreme conditions. The optimal diaphragm seal designs, materials, system fill fluids and accessories are available for each...
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Technical information Materials, coatingsSpecial materials The diaphragm provides for the separation from the medium. The pressure is transmitted to the measuring instrument via the system fill fluid which is inside the diaphragm seal system. Other materials and coatings on request The standard material for diaphragm seals is stainless steel 316L. For the wetted parts, a wide range of steels, special materials and coatings are available for almost all diaphragm seal designs.
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The combinations of diaphragm seals with flange connection can be used for processes with aggressive, adhesive, corrosive, highly viscous, environmentally hazardous or toxic media. With its connection dimensions, the flange-type diaphragm seal is suitable for all currently used standard flanges. Another modification of this model is the diaphragm seal with extended diaphragm, which, among other things, is used at thick and/or insulated process lines or vessel walls. Cell-type diaphragm seals are used with a blind flange at the process. Nominal sizes in DN 15 ... 125 and DN 1/211... 5"....
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Cell-type Application Process and petrochemical industries with high measuring requirements PN 10 ... 100 (400) bar (class 150 ... 2500) Data sheet DS 99.28
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By using welding flanges for the connection to the process, a compact assembly can be realised at the measuring point with block flanges or saddle flanges. In addition, stress from vibration, potential leakage points and installation and maintenance costs are reduced. The process connection is realised directly at the flange. The measuring instrument is in a vertical position. Depending on the pressure rating, the fixing is made using a different number of screws. Flush diaphragm for installation via block or saddle flange Block or saddle flange 910.19, 910.23 910.20Block flange for single-...
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Diaphragm seal models The combinations of diaphragm seals with threaded connection can be used for processes with aggressive, corrosive, environmentally hazardous or toxic media. The diaphragm seals are available with female or male thread in their basic design. The wide variety of available process connections enables many different adaptations without any problems. Process connections with female or male threads in G % ... 1 y2 and % ... 1y2 NPT. Threaded design Plastic body, threaded designSmall diaphragm seal with flush diaphragm Application General applications in the pipework,...
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With sterile connection These combinations of diaphragm seals with pressure measuring instruments in hygienic design can be used for processes with gases, compressed air or vapour and also with liquid, paste-like, powdery and crystallising media. The diaphragm seals resist the temperatures that occur and meet the requirements for sterile connections. SIP and CIP criteria, which are an essential requirement for sanitary applications, are met by using WIKA diaphragm seals. These acronyms stand for the sterilisation and cleaning of the wetted parts in the process. The combination of pressure...
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Diaphragm seal models Threaded connections Milk thread fitting per DIN 11851 Threaded connection SMS standard Threaded connection IDF standard TYPE EL CLASS I JUNE 2018 Process connection Grooved union nut/threaded coupling PN max 40 or 25 bar Data sheet DS 99.40 Process connection Grooved union nut/threaded coupling PN max 40 or 25 bar Data sheet DS 99.40 Process connection Thread with grooved union nut PN max 40 or 25 bar Data sheet DS 99.40 Threaded connection APV-RJT standard The model 990.30 mechanical pressure measuring instrument has been specifically developed for homogenising...
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Manufacturer-specific connections 990.60 910.60 NEUMO BioControl® NEUMO BioControl® housing Process connection NEUMO BioConnect® connection Process connection For installation into the VARINLINE® access unit or connecting flange PN max 25 bar Process connection BioControl® and BioConnect® are registered trademarks of the company NEUMO
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