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GEMÜ Technical contributions

Keeping up with the current of time

Electric valves – a better alternative?

A growing trend towards electrification is also noticeable in the processing industry. There is an ever-increasing demand for more energy-efficient alternatives to compressed air systems. Yet every actuator type has its own advantages and disadvantages. Therefore, the general question is not which actuator type is the „best“, but rather a question of which actuator system is the most suitable for which application. Consequently, for each application, not only a suitable valve type must be selected, but also an optimum actuator type – as per the slogan „the right actuator for every application“. As an expert partner with many years of experience in the field of electrical, pneumatic and manual actuators, GEMÜ is ready to assist its users in selecting a suitable actuator. The main factors for consideration when selecting the ideal actuator type tend to be cost, risk, performance and availability.


Focus on markets for refurbishment and retrofit applications

Immense potential worldwide thanks to the modernisation of microchip production plants

Digitalization, Industry 4.0, IoT and autonomous driving are just a few examples of current trends that are driving demand for microchips and are raising the bar when it comes to the requirements for the performance capability
of modern microchips.  To further improve performance capability, however, will also require an improvement in manufacturing technologies

Technical contribution

Innovative sealing concept for hygienic and aseptic filling

Valve designs in filling processes

IIn sterile and aseptic filling processes, the crucial criterion for the selection of the suitable valve designs is that the actuator unit and the working medium are hermetically separated from each other. Furthermore, the valve designs must withstand the existing operation, cleaning (CIP) and sterilization conditions (SIP). In addition to the various acid and alkaline cleaning agents, temperatures can reach 140 °C during sterilization.

To meet these requirements, diaphragm, globe or bellows valves are most commonly used today, featuring advantages and disadvantages depending on the place of use. The new and innovative PD valve design (plug diaphragm) combines the advantages of the previously used diaphragm and globe valve designs in a single valve.


Properties and optimum manufacturing process for functional stainless steel surfaces

Functional surfaces 

One of the most demanding markets when it comes to valve manufacture is the pharmaceutical sector. Valves that are suitable for the most demanding applications are required for the complex construction of pharmaceutical systems in order to guarantee sterile processes. Valves made from stainless chromium nickel steel are particularly important here; among other things, they should exhibit optimum cleaning behaviour as well as maximum corrosion resistance. To satisfy these requirements, the focus is not only on the Hygienic Design of these valves but primarily on the functional surface of media-wetted areas. The manufacture of these surfaces in the valve body is therefore closely tied in with a demanding and valid process that brings together all areas of production, from machining through to wet chemical finishing. Innovative manufacturing processes, compliance with qualitative specifications and in-depth manufacturer expertise in all areas also play an essential role here.


Development, manufacture and qualification of seal materials in aseptic valve designs

Manufacturing pharmaceuticals is complex and demanding. In addition to product development, the manufacturing process in particular plays a central role. To avoid costintensive loss of production and ensure optimal product quality, the production plants used must satisfy the strictest quality requirements. Aseptic valve designs play a key role in the product manufacturing process. They allow media flows to be distributed, brought together and regulated under sterile process conditions. The safe operation of the diaphragm valves used for this is dependent on the seal materials used, i.e. the diaphragms, in particular. Due to sometimes extreme conditions in the production plants during product manufacture, cleaning and sterilization processes, contradictory requirements for the properties of the seals used sometimes emerge. This is why the development of material mixtures, manufacturing processes and qualification and approval processes, taking into account international regulations and standards, is highly complex and requires specialized expertise, in addition to in-depth knowledge of materials and physicochemical processes.

In the manufacture of complex, high-quality pharmaceuticals, there is a particular focus on product quality and consumer safety. That is why pharmaceutical production processes are subject to standards and guidelines, compliance with which aims to ensure quality.

To avoid cross contamination, the collection of dust or dirt and other effects that would adversely affect the quality of the product, the production equipment must be designed accordingl

Media is regulated in the production plant under aseptic conditions during manufacture or cleaning and sterilization using appropriate valve designs. According to good manufacturing practice (GMP), you must be able to clean these easily and thoroughly, and they must not constitute a danger to or adversely affect the products with which they come into contact during production. Diaphragm valve technology, in particular, fulfils these criteria.