National Turbine - Model NT225 -Multi Stage Centrifugal Blowers & Exhausters

Number of Stages : 1 through 5. Inlet Connection : 2 7/8 Pipe, (optional) 2 1/2 NPT or 3" (76.2 mm) Flange, ASA 125# Drillinc. Outlet Connection : 2 7/8 Pipe, (optional) 2 1/2 NPT or 3" (76.2 mm) Flange, ASA 125# Drillinc. Operating Speed : 3550,7050 or 8180 RPM. Maximum Casing Pressure 15 PSIG (1.05 kg/cm2). Seals (air) : Labyrinth. Bearings : Ball, 10-Year Minimum Life Per AFBMA B-10 Standard (Made in U.S.A.). Lubrication : Grease. Impeller Diameter : 11" "(279.4 mm). Impeller Tip Speed : 23557 FPM at 8180 RPM. Drive Type : Belt drive or direct coupled. Max. Vibration Spec .0.48 in/sec (ISO overall spec), 3.0 mils peak to peak. Shaft End : .7/8" (22.3 mm) Diameter, Inlet Drive Standard. Noise Level : .Compliant With OSHA Standards (Certified test available).