Some questions on centrifugal blowers--
1. For the same installation, CFM, and DP (ours will be ~5000cfm and ~10iwg), roughly how much noise difference (dB) is there between a Radial Blower and a Backward-Inclined Blower? I'm mostly concerned about the airstream noise (not housing).
2. Does anyone have plots of frequency spectra (dB v. Hz) for Radial and/or BI blowers?
3. If used in a heavy-dust-laden airstream, I know BI blowers can load-up with dust on the back of the blades. For sawdust around 2 grain/cuft, how long would it take for it to load-up unacceptably? And, can a BI blower handle a large load of dust (say 50 grain/cuft) for a second or two?
Thanks, David
1. For the same installation, CFM, and DP (ours will be ~5000cfm and ~10iwg), roughly how much noise difference (dB) is there between a Radial Blower and a Backward-Inclined Blower? I'm mostly concerned about the airstream noise (not housing).
2. Does anyone have plots of frequency spectra (dB v. Hz) for Radial and/or BI blowers?
3. If used in a heavy-dust-laden airstream, I know BI blowers can load-up with dust on the back of the blades. For sawdust around 2 grain/cuft, how long would it take for it to load-up unacceptably? And, can a BI blower handle a large load of dust (say 50 grain/cuft) for a second or two?
Thanks, David