The DDV Dust Duty Valve comes with a cast housing designed for greater capacity in applications where a quality air seal is necessary in light duty, non-abrasive applications, William W. Meyer & Sons says. The DDV valve is designed for under Baghouse, Cyclone and dust collectors with a maximum pressure differential of 60’-inch wc and a maximum temperature of 300 F. The DDV is available in cast iron or stainless construction with square or round flanges, in sizes from 6 to 14 inches.