807411 Version 09/2013 Print 09/2013 www.wolf-corporate.de Diaphragm Competence Bürkert Fluid Control Systems Christian-Bürkert-Straße 13-17 74653 Ingelfingen Germany Tel.: +49 (0) 7940/10-0 Fax: +49 (0) 7940/10-91 204 [email protected] www.burkert.com

Diaphragm Competence From development through implementation – Quality from Bürkert Product overview EPDM diaphragms PTFE diaphragms As the name implies, the diaphragm is the most important part Diaphragm Competence Advanced PTFE diaphragms Spare parts phragm valves you are on the safe side in every respect. cerning this crucial component. With Bürkert diaphragms and dia- Selection of suitable components All the more reason not to make any compromises in quality con- c ­ ases also vice versa – it protects the environment from the it protects the process from external influences and – in some...

Product overview – The right diaphragm for every need Our spectrum of diaphragms comprises the following four basic types, with different properties that optimally meet the requirements of different applications. EPDM diaphragms Very flexible diaphragms made of ethylene-propylenediene rubber suitable for use in hygienic processing applications. Diaphragms of fluoro rubber, especially suitable for use in water treatment applications. PTFE diaphragms Polytetrafluorethylene is the material from which these diaphragms are made, which due to their chemical i ­nertness and low reactiveness are excellent...

EPDM diaphragms Ethylene-propylene-diene rubber is a synthetic rubber or elastomer that can be used in a broad range of applications. The main reason for this is its very high r ­ esistance to the influences of temperature and ozone, as well as its general weather-proofness. These diaphragms also feature good resistance to polar s ­ ubstances and steam. FKM is the abbreviation for fluoro rubber in accordance with DIN ISO 1629 and ASTM D1418. All types of fluoro rubber contain vinylidene (di)fluoride (VDF) as one of their monomers. Fluoro rubber is of a higher quality and therefore more expensive...

PTFE diaphragms Diaphragms made of A ­ dvanced PTFE Polytetrafluorethylene is a synthetic fluoropolymer consisting of ­etrafluorethylene, t which can be used for a broad spectrum of applications due to its ­ utstanding o properties. Since it consists of carbon and fluorine, which bond with a high m ­ olecular weight, PTFE is a solid. Due to the strong carbon-fluorine bonds it is especially inert, since other substances cannot break this bond. For this r ­ eason, PTFE is frequently used in tanks and pipelines for reactive and corrosive c ­ hemicals. Polytetrafluorethylene is a synthetic fluoropolymer...

Diaphragms made of A ­ dvanced PTFE Temperature range –10 to +130 ºC for continuous operation –10 to +140 ºC for uninterrupted operation –10 to +90 °C for Multiport valves Robolux Type 2036 Diameter range DN08 (1/4 inch) to DN100 (4 inch) Certifications FDA: 21 CFR 177.1550 FDA: 21CFR177.2600 (support diaphragm) USP35, Chapter <87>, Chapter <88>, Class VI, 121 °C Standard PTFE Diaphragm Competence Advanced PTFE

Production – From raw rubber to a precision manufactured high-tech diaphragm Quality is at the focus of our diaphragm production, because as described at the outset, the diaphragm is the core component of the diaphragm valve. The performance of the process depends entirely on the quality of the diaphragm. Minimal faults can easily have major effects so our experts pay close attention to every step of the manufacturing process. Besides experience in processing the different materials, a crucial role in diaphragm production is also high-precision production in accordance with the high standards...

Design – Form follows function advanced PTFE in white The material composition must not only comply with industry minimum standards such as 21CFR177 and USP 87/88, it also must be able to be withstand standard manufacturing processes such as vulcanisation and peroxide curing. The selected material must also have optimal process compatibility, taking into account variables such as the chemical composition of the process, expected cycle life, risk factor, expected temperature limits and particle size. During the exacting design process, all materials that pass these two initial evaluation stages...

Dimensions – Finding the right size Traceability – An essential part of your process The diaphragm dimensions below will help you determine the right size for your installation. Traceability in a pharmaceuticals plant is essential for ensuring that all materials have the required certificate and for documenting the production period and the production type of the completed product for later quality assurance processes. Traceability is required both in the GMP (Good Manufacturing Practices) guidelines and in the ASME BPE guidelines. The production date is not to be used as the basis for an expiration...

Certificates – Prerequisite for s ­ uccessful process validation Process validation is an essential quality control for process reliability. Its purpose is to document that a process or system fulfils the specified requirements, in a repeatable and permanent manner. To ensure this reproducibility of desired results in your process cycle, it is important that you use traceable components of high quality. With Bürkert diaphragms and diaphragm valves you can be certain of this, because our products have been extensively tested and certified. Buerkert Werke GmbH Christian-Buerkert-Strasse 13-17,...

Bürkert diaphragms – Choosing the right component Service and maintenance – Optimisation of the diaphragm life To help you decide which diaphragm optimally fulfils the requirements of your process, the following table lists our extensive product range in a detailed and transparent manner. If you need assistance in choosing the right component, just call us. We will be glad to help you select a diaphragm that is optimized for your process. The life of the diaphragm depends on the following factors: • the material of which the diaphragm is made • the medium with which the diaphragm comes into contact...