Basic principles of pneumatics

2. 1. Boyle’s law:
This law was formulated by Robert Boyle in 1662.
 It states “the absolute pressure of a given mass of a perfect gas
varies inversely as its
volume. When the temperature remains constant.
p α𝟏/𝒗
or
pv = constant
The more useful form of the above equation is : P1v1 = p2 v2 = p3 v3 =
Constant.

3. 2. Charle’slaw :
This law was formulated by a Frenchman Jacques A.C Charles in about
1787.
It states that the volume of a given mass of a perfect gas varies directly as
its absolute
temperature, when the absolute pressure remains constant.
Mathematically
V α T
or
𝑽𝑻= Constant
Where V is the volume of the gas;
And T is the absolute temperature.
The law can also be usefully expressed
as follow:
Vi/Ti = Vf/Tf

4. Gay-Lussac's law:
It states that the pressure of a given
mass of gas varies directly with the
absolute temperature of the gas, when
the volume is kept constant.
Mathematically, it can be written as:
P/T=constant
Gay-Lussac is most often recognized for
the Pressure Law which established that
the pressure of an enclosed gas is
directly proportional to its temperature
and which he was the first to formulate.

5. Difference between Hydraulics and Pneumatics: