Fan Amca Class

Overview

Engineering reference data for Fan Amca Class in miscellaneous.

Key Formulas

Unit Conversion

$y = x \cdot k$

Multiply by conversion factor.

Linear Interpolation

$y = y_1 + \frac{(x - x_1)(y_2 - y_1)}{x_2 - x_1}$

Estimate between two known points.

Percentage

$p = \frac{\text{part}}{\text{whole}} \times 100\%$

Part as fraction of whole.

Variables

Symbol	Description	Unit
$x$	Input value	—
$y$	Output value	—
$k$	Conversion factor	—

AMCA Fan Classification Table

The following table outlines the AMCA fan class ranges for double-width airfoil centrifugal fans based on static pressure and outlet velocity.

Classification Example

Problem: Determine the AMCA fan class for a fan operating with a static pressure of 4.5 in W.G. and an outlet velocity of 3500 ft/min.

Solution: The operating point (SP = 4.5 in W.G., Vel = 3500 ft/min) falls within the range for AMCA Fan Class II (Lower Range: SP = 4.25 in W.G., Vel = 4175 ft/min; Upper Range: SP = 8.5 in W.G., Vel = 3000 ft/min).

Interactive Charts

References

• Original Source