As with the entire aseptic D-tec range, the outstanding sealing properties of the new valve stem diaphragm raise hygiene standards to an UltraClean level, thus increasing the shelf life of soft drinks, fruit juices, as well as milk-based and lactic acid-fermented products. If manufacturers adapt their process chain accordingly, the D-tec can help them achieve a desired shelf life with fewer preservatives.
With its D-tec D/DV double-chamber valve, GEA successfully completes its UltraClean valve range, allowing customers to now fully integrate D-tec equipment into their production processes.
Explained Pascal Bär, Product Manager for GEA Aseptic Valve Technology: “Equipping the interfaces in process plants with as few valve types as possible is often a decisive criterion to our customers. Spare parts handling and warehousing become increasingly complex when different valve types must work together."
After launching the single-seat D-tec P/DV control valve in 2018, GEA is now introducing the D/DV double-chamber valve as the final piece of the puzzle in its D-tec range. GEA can now consistently plan greenfield projects leveraging D-tec; a retrofit for the single-seat valve is available for existing systems.
With the D-tec double chamber valve, GEA now offers aseptic valves for both hygiene classes 'Aseptic' and 'UltraClean', which are tailored to the special conditions of the respective applications. According to its hygiene philosophy, GEA recommends this distinction: Added Bär: "Aseptomag, our metal bellows technology, is the benchmark in hygienic processing, which we use for highly sensitive products such as baby food and UHT milk as they demand an uncompromising aseptic execution of processes and components. However, a wide range of beverages produced by our customers are not promoted under aseptic conditions. In fact, they fall into the second highest hygiene level according to the VDMA guideline, which is hygiene class IV ‘UltraClean’. That is why our new D-tec D/DV is meeting the process requirements of this hygiene class.”
D-tec is suitable for iced tea, fruit juice, fruit yogurt and ESL milk and products that require an increased shelf life depending on the pH value, cold chain and storage conditions.
When it comes to UltraClean applications, GEA systematically opts for the hermetically sealed D-tec stem diaphragm because it provides improved contamination protection against the atmosphere and ensures microbial stability of products throughout their manufacture. The membranes are made of thermoplastics that are more flexible than stainless steel. For example, this makes them well-suited to compensate for pressure surges, says Bär.
They are, to a certain extent, more forgiving to process errors. In the event of a diaphragm rupture, the leakage detection system ensures a high degree of operational safety. The product manager adds: “Our product development is directed towards ensuring equipment availability and profitability for beverage and food producers. The new double-chamber valve fulfils this: It can be used very flexibly and combines a high level of hygiene with manageable operating costs.” In addition, the maintenance-friendly design minimises system downtimes. For more visit gea.com
Source: GEAAuthor: COX