You must determine whether you prefer a hydraulic system or an automation pneumatic actuator. Some variations between the hydraulic system and pneumatic actuators are found here to encourage your decision:
The most popular fluid medium for hydraulic systems is the hydropower systems with liquids and gasoline. Hydraulic fluids are, therefore, usually not compressible. This is why hydraulics can operate at extremely higher forces from 1,500 PSI up to 2.500 PSI because they do not compress.
Incompressible oil is used by hydraulic systems that allow more control and movement accuracy. The running costs of the hydraulic fluid are at all times smaller than the circuit pressure. Since hydraulic uses non-compressible fluids, they are ideal for industrial applications where a high level of accuracy is required. These systems may carry static loads for prolonged periods due to minimum variability in the actuator's predicted strength. This is suitable for mobile applications such as lorries and heavy goods vehicles.
However, in addition to providing many hydraulic systems, there are some inconveniences, such as hydraulic systems, as the materials used for building hydraulic systems are more costly than pneumatic systems. The most expensive choice to choose is hydraulic systems.
Besides, a system leakage is prominent due to oil used as a means of transmission, resulting in protection and environmental risks. Leaks may also be very expensive if not quickly identified and handled. Owing to increased pressure on hydraulic circuits, the possibility of fire increases. Not just that, even hydraulic systems are dirty and noisy. All the necessary materials, such as filters, lines, pumps, and oil in hydro-systems, need regular checking, adjustment, cleaning, and timely replacement. Consequently, more maintenance is required, and the downtime and expense will increase.
In comparison to Hydraulic systems, gas is the primary means for transferring posers in pneumatic fluid circuits from one position to another. Gasses can be compressed and need more space. As the pneumatic fluid is compressible at low pressures, it typically works at or below 100 liters per inch (PSI). And the traveling is two m/s quicker and faster. As pneumatic systems work at low pressure, it is therefore mandatory to build them from lighter materials compared to their hydraulic components.
Since pneumatic systems with lightweight materials have been built and comparatively fewer operating components, the initial cost would also be lower. Yet running costs can be higher depending on their use. More commonly, pneumatic systems are considered irrational in industries since they require a very fine positioning, and when decompressed, they expand rapidly, resulting in an anticipated force variability. However, these systems are ideally suited to food applications due to their clean operation.
Pneumatic systems are ideally suited to production conditions, which require precise operating precision and gentleness. The working pneumatic systems are also quieter as the pneumatic and actuator compression system usually has to be mounted separately. Besides, low maintenance and cleaning pneumatic systems are required.
Due to gas use, there are fewer probabilities for industrial accidents, and advanced skills are not needed.
There are also many inconveniences, which may need repairs, including compressors, air filters, and condensation lines. It is hard to manage and expensive to maintain variable speed and slow-motion together with high accuracy. Consequently, with time actuator wear out, replacements are required, which contributes to costs.
There are no one-size-fits-all when it comes to selecting fluid power systems. Every system has some advantages and decreases, hydraulic or pneumatic. You can pick actuators according to your need.