PECM Issue 23 2016 - Page 93

offer bespoke design solutions that can be manufactured and assembled in-house. One of the crucial aspects of the design was the detection and prevention of air bubbles which can substantially corrupt the analysis results. Coupled with the client's requirement for a transparent inspection window, it was essential that the Bürkert designers avoid any rough surfaces, dead zones and sharp edges while creating the new dosing unit. The engineers developed an injection moulded component that would house the control elements and machined it in such a way that all of the internal passages had a very high quality surface finish. The control valves, based on the Type 0127 solenoid valve and the Type 6628 Twin Power rocker solenoid valve, were positioned to minimise dead zones and deliver maximum flexibility of control. The Bürkert solenoid valves have been specifically designed to deliver complete back pressure tightness, excellent flushability and a low internal volumewhile offering precision switching of micro volumes. In addition, the basic design of these solenoid valves ensures complete fluid separation that enables them to be used with aggressive fluids, which is essential for applications using specific cleaning chemicals as part of the process. The cooperative approach to the design and manufacture of the new dosing unit has brought together technological innovation and a desire to overcome the technical challenges associated with the development of a unique solution. Bürkert Fluid Control Systems is one of the leading manufacturers of control and measuring systems for fluids and gases. The final design can be used in a number of analysis devices, thanks to its flexibility, which means that the overall demand for the product increases. This increases the demand for components and reduces manufacturing costs, making the new dosing unit a very cost effective project for the client. www.burket.co.uk