Pneumatic Cylinder

Reference data and engineering information about pneumatic cylinder for gases and compressed air applications.

pneumaticcylinder

Overview

Engineering reference data for Pneumatic Cylinder in gases and compressed air.

Key Formulas

Ideal Gas Law

$PV = nRT$

Pressure × Volume = moles × gas constant × temperature.

Boyle's Law

$P_1 V_1 = P_2 V_2$

At constant temperature.

Charles's Law

$\frac{V_1}{T_1} = \frac{V_2}{T_2}$

At constant pressure.

Variables

Symbol	Description	Unit
$P$	Pressure	Pa
$V$	Volume	m³
$T$	Temperature	K
$R$	Gas constant	8.314 J/(mol·K)

For applications using imperial units, the pneumatic cylinder velocity can be calculated with the following formula, where volume flow is in cubic feet per minute (CFM) and the result is in inches per second (in/s):

s = \frac{28.8 \times q}{A}

Where:

$s$ = Cylinder velocity (in/s)
$q$ = Air volume flow rate (ft³/min)
$A$ = Piston area (in²)

The constant $28.8$ is derived from converting units of minutes to seconds and square feet to square inches ( $1 \text{ ft}^2 = 144 \text{ in}^2$ ), combined with the assumption of atmospheric pressure standard conditions. This formula is particularly useful for quick calculations with equipment data commonly provided in imperial units.

References

Original Source

Source: engineeringtoolbox.com