GEA presents its new aseptic and inverted RVIN control valve at drinktec 2017 (hall A3/stand 313). This new valve type is particularly characterized by the inverted structure of the control cone and therefore also specifically suitable for application processes in which commercial aseptic stroke valves would have to close with the product flow.
As for all components for aseptic processes, development of this inverted control valve also had to meet the highest quality and safety requirements. Therefore, the RVIN control valve is based on the proven GEA Aseptomag® valve series and their modular system. A welded metal bellows forms the core component, seals the product chamber hermetically against the atmosphere and thus permits best product safety.
New inverted control valve for complex production processes
Aseptic control valves serve precise setting and control of parameters such as flow, pressure, temperature or fill level in aseptic process systems. They are used in the food, dairy and beverage industries as well as in the chemical and pharmaceutical industries. In contrast to conventional control valves, the inverted control valve has its control contour on the side facing away from the bellows, so that it can be closed against the flow direction even in application processes where the product enters the valve on the bellows side. The valve is controlled via an electropneumatic positioner and permits precise positioning of the valve disc by control of the pneumatic actuator. The single-part housing with two chambers designed specifically for this new GEA control valve ensures that no mechanical interfaces outwards can endanger product safety on the negative pressure side. "With the new inverted RVIN control valve, we have created a solution that reliably maps even demanding processes such as product relief into a vacuum tank after steam infusion or steam injection," explains Pascal Bär, product manager for aseptic valve technology at GEA.
Valve technology for individual customer requirements
A customer query inspired GEA to review existing valve solutions for certain system parts and to optimize them for this process environment. "We cooperated closely with a renowned customer from the food and beverage industry to design a new valve type in the inverted RVIN control valve," explains Pascal Bär. "The special challenge was that the valve is used in a system range where there is an overpressure on the product inlet side and a vacuum on the outlet side. Our target was to combine the best process and product safety with high economic efficiency." In close cooperation with the customer, GEA was able to ideally adjust the new valve to the process conditions while still using many parts of the existing GEA Aseptomag® construction kit. "Our customer has been using the inverted control valve for more than a year without having to replace any wearing parts during this time. Comparing this to the previously common maintenance interval of three months, we can speak of a significant improvement, which confirms our efforts to work close to the customer and the application."
As is usual at GEA valve technology, the materials used in product contact meet all common standards, such as the FDA 21 CFR § 177.2600 and the EC 10/2011 as part of the EC 1935/2004. GEA also places high value on hygienic structure of its components.