What comes to your mind when you think about factories that produce cars, computer boards and coffee grinders? Probably an impressive robotic environment with dozens of computerized arms, perhaps much like limbs of octopus going about fitting things on an assembly line.
The reality is actually different. Most of the power in these labs is provided by pneumatics and not by electric motors. So, next time you hear the sounds of ‘psshh’ and ‘hiss’ in a plant you should know that there are pneumatic systems around.
In pneumatics, the mechanical motion is achieved by using pressurized air or gas, as opposed to h hydraulic systems which use liquids for the same purpose. Systems based on the principle of pneumatics are employed in many industries which deal with compressed air and inert gases. Compared to actuators and electric motors, the energy produced by these systems is more flexible, more reliable, less costly and far less dangerous.
The use of pneumatic fittings is not restricted to factories. You just need to have a look around and you will see them everywhere. In our daily lives, we use many itmes in which pneumatic fittings are present.
A few common examples of things we use in our daily life that contain pneumatic fittings are:
Types of Commonly used Pneumatic fittings
This is the most commonly used air fitting. They are designed for systems which employ nylon and polyurethane tubes generally used in normal working environments. As it is a type of pneumatic fitting, it does not have tolerance for liquids; instead air is used.
These fittings work under a pressure of 0-150 psi in an environment where temperature is in the range of 0-60 degrees. It can work under a negative pressure of -29.5 Hg. Its body material is made up of PBT (polybutylene terephthalate).
The benefit of using a plastic fitting is that it is light in weight and can withstand a significant amount of pressure. They are also affordable; their only drawback is that they cannot withstand high temperatures and high pressure.
These fittings are made from nickel plated brass and few composite fittings are made from glass reinforced nylon. Connection and disconnection of these fittings is an easy task and hence they are perfect for places where fittings have to be changed regularly. They can be used with polyurethane, nylon, PE and other types of tubes which are not commonly used.
They are used to carry compressed air, and they work under a pressure of -0.8 - 15 bar in environments where temperature is in the range of 10-60 degrees. A major benefit of using this fitting is that it has an easy structure and can withstand high temperatures. They are reasonably priced and well known for their durability. However they cannot be used in environments where corrosion could take place.
Unlike brass push-in fittings, stainless steel push-in fittings can be used in corrosive environments. The circuit can be assembled quickly with the help of these fittings and they can carry compressed air at a wide range of temperatures and pressures. They can be connected and disconnected manually and immediately. Its applications include robotics and conveyer systems.
They can operate under a pressure of -0.99 - 15 bar in an environment where temperature is in the range of 20 - 200 degrees. Since they are capable of high performance they are more expensive than other types of fittings.
Also known as rapid screw fittings, pneumatic push fittings and are widely used in the pneumatic industry. They are more reliable than other types of fittings and take longer to connect and disconnect. They have a firm grasp on the hose due to the nut. Twisting of pipe can be avoided by the swivel part and hence is more steady than the push-in fittings.
They can operate under a pressure of -0.8 – 15 bar in an environment where temperature is in the range of 10-60 degrees. They are capable of withstanding high pressure and high temperatures.
Apart from the ones described above, there are many other types of pneumatic fittings such as pneumatic compression fittings, brass connectors, pneumatic quick coupling, push button safety pneumatic coupling etc. If you intend to replace any of these fittings, or need more information regarding pneumatic fittings, contact us and we will be able to offer you our professional advice.