Rotary Air ValveThe D. P. Rotary Air Valves have been designed for absolute universal use. They are ideally suited to control delivery or discharge of powders or palletized products to and from hoppers, bag filters and centrifugal separators. Rotary Air Valve's strong and compact construction makes it a simple matter to access the internal working parts.Size 150-175-200-250-300 & 350 mm