Fan Pressure Range

[dlybbert]

I am looking for a high pressure/high output fan for a new R&D project. It has been a long time since I have dealt with fans. Many fans that I am coming across are giving a "Static Pressure Range =~ 300 in.wg", but then the spec sheet gives a static pressure of 5 in.wg.

What is the difference between the "Static Pressure Range" and the "Static Pressure"?

Thanks,

 

[DRWeig]

I'm going to guess that the spec sheet to which you refer comes from your system design, not the fan manufacturer's generic data sheet, correct? A fan manufacturer cannot state a specific static pressure unless he has the details of a specific job design. That specific static pressure is set by the system to which the fan will be applied.

Lots of fan manufacturers say maximum static pressure instead of static pressure range.

Static pressure range indicates the manufacturer's statement of the limits of the fan's capabilities. The one you cited above can do 11 psig. That's a big hog. In that size, industrial users call them blowers and sometimes compressors. Your application is high pressure for HVAC, though.

Good on ya,

Goober Dave

Haven't see the forum policies? Do so now: Forum Policies

 

[Drazen]

what is control option of your fan?

say, in general, manufacturer state somewhat as a "range" for static pressure at 0 volume flow, and you working point can be something really different, and even fan's mid-range could be very different.

i have always seen that confuses young engineers, but manufacturers have some tradition around that.

this is mostly aligned with what drweig said - your working point is what counts, and you actually cannot see whether some fan can comply without looking at fun curves.

 

[KiwiMace]

I would say the static pressure range is referring to the pressure resistance of the fan casing rather than any performance of the fan itself.