Get current pricing for Smoot, Smoot-51781-ID Smoot Carbon Steel Rotor Airlock. Carbon Steel Rotor Has (8) 3.5 Deep By 8.5 Wide Vanes. Infeed Opening Is 8 X 8. Airlock Has A 1/3 Hp 1760 Rp . Product Category: Process Equipment, Sub Category: Process Valves: