Pneumatics are found within a wide variety of systems and use the energy stored in compressed air to carry out work. Pneumatic components can be found in circuits and utilise symbols to aid individuals in identifying each separate system piece. When working with pneumatic systems it is important that each symbol is understood by the individual, helping to avoid accidents, and ensure that the system works at its most efficient.
There are several sectors of business that use pneumatics within vital pieces of manufacturing equipment. Consequently, there are multiple types of cylinders and valves to support such diverse machinery.
Single-acting cylinders with a three port valve use the compressed air stored to push a piston out, whilst a spring is used to push it back in again, forming a continuous cycle of movement. A single acing cylinder is commonly controlled by a simple switch type component which governs air flow, named a three port valve.
Individuals will find that certain types of machinery require double-acting cylinders which are controlled by five port valves. When using machinery that requires pneumatic components, it is important to ensure you have a fully operational control valve in place, should you ever need to slow down the exhaust air.
Further to this, certain pneumatically operated systems include time delay circuit equipment. As the name suggests, time delay equipment provides a pause between the operation of a valve and the action of a piston. In order to generate such a calculated break between the action and movement of a piece of machinery, a unidirectional-flow control valve needs to be connected to a reservoir where air will slowly build, causing the pressure inside to rise until it reaches a certain limit that will eventually cause the valve to operate.