Large inlet rotary valves offer uninterrupted powder flow
17 February 2015
GEA has launched a new range of large inlet rotary valves designed for food and dairy powder products.
The new valve has been designed to meet the needs of applications that require an uninterrupted powder flow through the valve. The design angle of the throat of the valve inlet is critical in these applications, as any interruption to the flow can cause bridging especially when handling products that do not flow well.
Typical applications could include spray dryers, cyclones, and dust collection or recovery systems, where throughput is not the deciding factor but fine product can bridge and restrict flow.
Stainless steel rotary valves that have a suitably large inlet size for attaching to dryers and cyclones require a high structural integrity of the finished casting after machining. This can be difficult to achieve without adding external bracing which can hinder cleaning and maintenance tasks.
GEA has created a much more rigid single piece casting that can perform better under potentially dust explosion conditions. castings have been designed in accordance with ATEX 94/9/CE Class 2 Cat.1 Zone 20 to withstand dust explosions, making them suitable for use in high risk installations such as spray dryers, cyclones and dust collection systems.
The new valves are available in sizes ranging from 200mm to 300mm diameter for the CV500 model and from 300mm to 350mm for the CV750 model. A 12-vane rotor, with an upgraded end-plate fastening, is available for applications that require full explosion containment.
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