- f -
For suction pressures below 270 mm W.G (10 in W.G) the correction is normally neglected.
Corrected suction pressure can be expressed as:
Psc = Ps f (1)
Psc= corrected suction pressure (mm W.G., in W.G)
f= correction factor
Ps= design (and measured) suction pressure (mm W.G., in W.G)
Design or measured suction pressure for a fan is Ps = -380 mm W.G. (-14 in W.G). The correction factor from table above 1.04. For a proper fan selection the suction pressure should be corrected to
Psc = (-380 mm W.G) 1.04
= -395 (mm W.G.)
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