Confirming Air Volume Capabilities of a Drying Machine

He he sort of like a rocket engine exhaust...probably more like 741.3cfm...

Something's not right.

Model number and manufacturer please.

Model # 421 PS

The manufacturer is Elettrotecnica B.C. S.p.a., 27029 Vigevano (Italia).

The manufacturer has offered an additional statement, saying; "the machine only exhausts 50% of the air that it is moving at any given time."

This statement now brings into question their specification of 3.5 m3 per sec. of air being exhausted. It sounds like they are saying the machine exhausts 3.5 m3 per sec. but only 50% of the air is "actually" exhausted.

My goal in posting the question originally was to confirm the validity of 7,413 cfm of air being exhausted through a 4.5" opening. Furthermore, that a motor drawing only 8.5 amps at 220V - 3 phase is doing the job. These numbers do not seem realistic.

This being an international forum, I expect someone here can help you with a translation, or technical insight.

Thanks SolarEagle,

For clarification, the air consumption provides the forward movement of the conveyor and has nothing to do with the ventilation.

For clarification, the air consumption provides the forward movement of the conveyor and has nothing to do with the ventilation.

Makes sense since 6L/min = 0.0001 m3/sec. So where did the 3.5 m3/sec spec come from?

A quick calculation of Q = A*V and therefore V = Q/A for a 4.5" opening gives a velocity of around 67,000 ft/min. I'm sure the fan is not sized to give that kind of velocity!

Something is off somewhere.

The 3.5 m3/sec. is the specification from the manufacturer for the amount of air being exhausted from the dryer (= Flow = Q). Here's what I get for velocity;

Q = 123.6 ft3/sec.

A = .110 ft2 = area of the 4.5" orifice

V = 1,123.6 ft./sec.