Regenerative Blower Silencers Outside Diameter 5.12 in Connection Style Screw On Inlet Size 3 in Inlet Type NPT Inlet Gender Female Outlet Size 1 in Outlet Type NPT Outlet Gender Female Maximum Air Flow 575 cfm Compatible Manufacturer Part Number VFC904A-7W VFD9 Compatible Grainger Part Number 5F243 6JD32 Number of Air Inlets 1 Number of Air Outlets 1 Noise Reduction Rating 5 dB Maximum Operating Temperature 225 Degrees F Minimum Operating Temperature 212 Degrees F