Multistage centrifugal blower model 251

Construction materials

Bearing body: Cast Iron FGL 250
Head, sections: Cast Iron FGL 250
Cross Bar: 13/16” (20 mm) diameter cold-drawn A60 steel
Sealing gasket compound: RTV IS502 Silicone
Sealing (air): 2 graphite rings on each terminal
Sealing (gas): 4 carbon rings on each terminal with inert gas injection

Bearings: 6316 C3 ball bearing per AFBMA B10 standard
Shaft: C35 Carbon Steel (available in stainless steel)
Turbines: Formed Aluminum 5754/6082T6
Motor pedestal: Stainless steel
Chassis installation: UPN plated carbon steel
Noise level: OSHA compliant (certified testing available)

Technical data

Number of stages: From 1 to 8 (casting)
Inlet connection: Flange 14″ (355 mm), PN 10 DN 350
Outlet connection: Flange 14” (355 mm), PN 10 DN 350
Operating Speed: 3550 direct drive (60 Hz)
Lubrication: Oil at constant level
Turbine diameter: 2″ 9/16 (65 mm)

Turbine tip speed: 400 f/s (122 m/s)
Critical Speed: 4601 rpm (7-stage)
Transmission: Direct or v-correct
Vibration Tolerance: 4.5 mils
Final Shaft: 2″ 9/16 (65 mm), Standard Final Drive

Dimensions

Blower 251.01 : 559 x 2591 x 3048 (mm) / 1650 Kg
Blower 251.02 : 759 x 2591 x 3048 (mm) / 1950 Kg
Blower 251.03 : 959 x 2896 x 3353 (mm) / 2300 Kg
Blower 251.04 : 1159 x 3200 x 3658 (mm) / 2650 Kg

Blower 251.05 : 1359 x 3658 x 4115 (mm) / 3050 Kg
Blower 251.06 : 1559 x 3658 x 4115 (mm) / 3350 Kg
Blower 251.07 : 1759 x 3912 x 4369 (mm) / 3750 Kg
Blower 251.08 : 1959 x 3912 x 4369 (mm) / 4050 Kg