Badotherm Diaphragm Seals are being used in a wide array of industries, to protect the sensitive and vulnerable pressure sensor from the harsh process conditions, such as aggressive and corrosive media, extreme high temperatures, and viscous media. It is a recognized phenomenon in the process industry that higher process pressure and higher process temperature can improve the overall efficiency. Currently, when measuring pressure with transmitters with Diaphragm Seals, the temperature limit of Diaphragm Seal applications is set at 410°C, as this is the maximum allowed temperature of the filling fluid. Badotherm has developed a new Diaphragm Seal that can withstand process temperatures up to 600°C. To enable a proper functioning of the Diaphragm Seal at these extreme process temperatures, a patented, revolutionary new design and principle is used.
Diaphragm seals are used to separate the pressure instrument from the process, to protect the vulnerable measuring element. This protection enhances the lifetime of the measuring instrument significantly. However it can happen that the diaphragm eventually breaks. One of the advantages of diaphragm seals is that they can be renewed, whilst reusing the pressure instrument. It will function just as a new instrument, but with the benefits of lower cost, and a much shorter lead time than buying a new instrument with seals. Badotherm has been supplying this service for over 25 years to the end users. All brands of transmitters with diaphragm seals can be sent back to Badotherm, because Badotherm operates independently of transmitter manufacturer.
Badotherm is a European manufacturer of pressure and temperature instrumentation. To have an idea on the products that are manufactured and supplied by Badotherm a brochure with an overview of the product range.
BaseCal is the web-based performance calculation tool for diaphragm seal applications, powered by Badotherm. The tool is intended for instrumentation engineers or anyone wishing to understand the effect of all variables and conditions on a diaphragm seal application. The tool calculates the total installed performance of the diaphragm seal application, including the transmitter. BaseCal allows you to easily change different variables and conditions, so you can simulate and analyse the effects of these different variables. Mounting a diaphragm seal to a pressure transmitter changes the performance of the transmitter. The diaphragm seal application will have additional temperature and pressure effects and changes the response time depending on the transmitter diaphragm seal configuration. The performance of the entire system needs to be evaluated when specifying a diaphragm seal system for a new application to ensure satisfactory performance once installed.
In today’s process industry there are many processes that operate with very low pressures (< 100 mbar). Badotherm developed a Diaphragm Seal for low pressure gauge pressure applications. This solution is referred to as LGP (Low Gauge Pressure) Diaphragm Seal and can be used in combination with several types. With this solution it is possible to measure up to 5 mbar with minimal temperature effects.
Hydrogen is the lightest and most abundant chemical element. Water, acids, bases, and the related family of organic compounds all contain hydrogen. Although hydrogen is not considered to be corrosive, problems with pressure transmitters mounted with Diaphragm Seals can still occur under specific circumstances. For example, a situation in which
either high process pressure, a galvanic reaction or high temperature steam occurs in combination with high process temperatures, could result in Hydrogen Permeation of the into H+ splitted H² molecules. For this situation, Badotherm offers a solution with the use of a special material on the Diaphragm Seals: a layer of gold coating.