One only item new and unused available, air operated gates.

Rolling Blade Diverters (OS or TW) PEBCO® Offset Rolling Blade Diverters offer full diversion or flow splitting while providing the ability to positively close both legs. When closed, the Rolling Blade Diverters offer absolute dust-tight sealing capability, even under moderate differential pressures.

• These diverters incorporate the features and benefits of the One Way Rolling Blade Gates into a diverter configuration
• Typically supplied with two actuators, one for each leg
• Unique in the PEBCO line, this diverter offers diversion, flow splitting, and positive closure of both legs
• Capable of closing through a static column of material
• Full, dust-tight sealing to the closed leg

Put this under your hopper or into your pneumatic conveying system for almost any material handling.

Manufacturer information at https://pebco.com/rolling-blade-diverter/