Diaphragm competence for hygienic applications Burkert Fluid Control Systems Christian-Burkert-Strasse 13-17 74653 Ingelfingen Germany Phone: +49 7940 100 Fax: +49 7940 1091204 [email protected] www.buerkert.de

Diaphragm competence From the development phase to implementation – Bürkert quality Product overview EPDM diaphragms PTFE diaphragms The significance is already indicated by the name – it is the diaphragm Diaphragm competence Diaphragms made of Advanced PTFE Spare parts Multi-medium testing facility diaphragm valves you are on the safe side in every respect. far as this essential item is concerned. With Bürkert’s diaphragms and All the more reason for making no compromises regarding quality as some cases it does the opposite: protecting the environment from be- Production process do not mix,...

Product overview – The right diaphragm for all requirements Our range of diaphragms covers the following five basic types, each with its own specific properties, each optimised to fulfil the requirements made in certain contexts. EPDM diaphragms Very flexible diaphragms made of ethylene propylene diene monomer rubber, mainly for use in hygienic processing. Diaphragms made of fluoroelastomer, which is especially suitable for use in water treatment. PTFE diaphragms These diaphragms are made of polytetrafluoroethylene, which is well suited for use in hygienic and chemical applications on account...

EPDM diaphragms Ethylene propylene diene monomer rubber is a synthetic rubber, i.e. elastomer, with a wide range of applications. The main reason for this is to be found in its excellent resistance to the influences of temperature and ozone, as well as its overall capacity to withstand the effects of weathering. Such diaphragms also display a good degree of resistance to polar substances and steam. FKM refers to types of fluoroelastomer according to DIN ISO 1629 and ASTM D1418. All types of fluoroelastomer contain vinylidene (di)fluoride (VDF) as one of their monomers. Fluoroelastomers are of...

PTFE diaphragms Diaphragms made of advanced PTFE Polytetrafluoroethylene is a synthetic fluoropolymer consisting of tetrafluoroethylene whose outstanding properties have led to its being used in a specially wide range of applications. As it consists of carbon and fluorine, two elements that bond to molecules with a high molecular weight, PTFE is a solid material. Due to the strong carbon-fluorine bonds it is especially inert, since other substances cannot break this bond. For this reason, PTFE is frequently used in tanks and pipelines for reactive and corrosive chemicals. Polytetrafluoroethylene...

Temperature range Advanced PTFE/EPDM (EU) -5 to +143 0C (steam sterilisation +150 0C for 60 min) Advanced PTFE/EPDM laminated (EK) +5 to +90 °C for two-weir diaphragms for Robolux Multiport valves, type 2036 Diaphragm size 8 (standard: DN8, 1/4“) to 100 (standard: DN100, 4”) Approvals FDA: CFR21 Part 177.1550 and Part 177.2600 EC Regulations 1935/2004 and 10/2011 USP Class VI Chapters <87> and <88> at +121 °C Permanent distortion at 23 °C Permanent distortion at 150 °C in % Standard PTFE Advanced PTFE The Advanced PTFE diaphragm material (green) always displays significantly less distortion...

GYLON® diaphragms Practical tests confirm the simulation results GYLON® is a new type of diaphragm material that is regarded as representing the third polytetrafluoroethylene (PTFE) generation. Thanks to its excellent properties, GYLON® currently covers the widest range of applications. In order to optimise the service life and leak-tightness of the diaphragms, simulations are used at an early stage of the development process. The results of the compression and flow model tests, at first purely theoretical, could be confirmed by experiment. PTFE and filler materials are restructured in the special...

Production – From raw rubber to a precisely shaped high-tech diaphragm In addition to the experience gained in handling the various materials, exact manufacturing processes according to the specifications of Bürkert’s engineers play a decisive role as well, of course. Therefore we only cooperate with audited and qualified production partners who are able to fulfil our high demands in terms of quality in their own production as well. Quality is central to our diaphragm production – for as explained at the beginning, the diaphragm is the “heart” of the diaphragm valve. More than any other component,...

Design – Form follows function Support diaphragm of EPDM for load distribution (black) The choice of material is an important factor when it comes to developing a new diaphragm. The material has to fulfil a range of specifications regarding ingredients and composition (FDA, USP etc.), while also being as easy to handle as possible (e.g. for vulcanisation). The functional design is oriented towards the anticipated range of implementation for the diaphragm. The engineer is constrained in terms of the material properties and the requirements that the diaphragm has to meet in later use. PTFE for...

The diaphragm sizes given are to help you find the diaphragm size that exactly serves your needs. In a pharmaceutical plant, traceability is essential in order to ensure that all materials have the corresponding certificate, and in order to fulfil the documentation and quality assurance requirements regarding production times and production methods. Traceability is required both by the GMP (Good Manufacturing Practices) guidelines as well as by the ASME BPE guidelines. The visible production date provides for transparency, for the diaphragms have differing service lives depending on where and...

Certificates – The precondition for successful process validation Process validation is an essential part of quality assurance regarding process safety. Its purpose is to ensure that a process or a system can repeatedly fulfil the specifications, also in the long term. To ensure that your process yields the desired results in a reproducible manner, it is vital to use reliable and high-quality components. You can be quite sure of this with diaphragms and diaphragm valves from Bürkert, because our products are comprehensively tested and certified. Diaphragm competence