Electronics Inc. will be exhibiting the maintenance-free MagnaValve(TM) media valve at Cast Expo (17 to 20 May 2008, at Atlanta, Georgia, USA). It uses a strong permanent magnet and electro-magnet design to regulate the flow of steel shot in blast cleaning machines. When no power is applied to the MagnaValve, the permanent magnet stops all flow. With power applied, the magnetic field is neutralized and the shot is allowed to flow through the valve. The MagnaValves for wheel blast machines may be used with amperage control (no built-in sensor) or flow control using a built-in sensor. The valve used on air type machines has a built-in sensor to show the actual shot flowrate in lbs/min or kg/min. MagnaValve work with cast steel shot and grit, cut wire shot and stainless steel cut wire shot and is available in 24Vdc and 110Vac models, and suitable for automotive, aerospace and other manufacturing applications, including foundries.