What Is Pneumatics? A Guide to Our Pneumatic Range

Hydraulics gets a lot of the attention on our site, but pneumatics is just as central to what we supply and repair. We hear the two terms used interchangeably fairly often, and it's an easy mix-up. Both power industrial equipment. Both rely on pressurised fluid power. But they work in different ways, suit different jobs, and use different parts, so knowing which is which matters when you're sourcing components or troubleshooting a system.

What is Pneumatics?

Pneumatics is the use of compressed air to create movement or force in a system. Instead of pressurised fluid (as in hydraulics), pneumatic systems use air drawn from a compressor, which is then filtered, regulated, and directed through valves to power cylinders, actuators, and tools.

A basic pneumatic system works in stages. Air is compressed and stored, usually in a receiver tank. It then passes through an air preparation unit, which filters out dirt and moisture, regulates the pressure, and in some cases adds a fine lubricant. From there, valves direct the air to where it's needed, and a cylinder or actuator converts that air pressure into physical movement, such as pushing, pulling, gripping, or rotating.

Because air is compressible and widely available, pneumatic systems are generally lighter, cleaner, and simpler to maintain than hydraulic ones. There's no oil to leak or dispose of, and the components tend to be smaller and less expensive to replace. The trade-off is that pneumatic systems can't match hydraulics for raw force or precise control under heavy load, since compressed air is less predictable than fluid under pressure.

That's why pneumatics tends to show up where speed, cleanliness, and repeatable movement matter more than brute strength, such as automated production lines, packaging equipment, sorting systems, and pneumatic hand tools. Hydraulics, by contrast, is the better fit for heavy lifting and high-force applications like rams, presses, and plant machinery.

The two aren't always kept separate, though. Some equipment combines both, using compressed air for fast, lighter movements and hydraulics for the high-force parts of the same cycle. Air-over-oil systems are a common example, where air pressure is used to drive a hydraulic circuit. So while the underlying principles are distinct, it's not unusual to find both types of components on the same piece of equipment.

What Counts as Pneumatic Equipment?

Pneumatic equipment covers anything involved in generating, treating, controlling, or using compressed air. In practice, this includes:

• Air preparation – filters, regulators, and lubricators, often supplied together as an FRL unit. These clean moisture and particles out of the air supply, set it to the correct working pressure, and, where needed, add a fine mist of lubricant to protect downstream components

• Cylinders and actuators – the components that convert air pressure into linear or rotary movement. These are the parts that actually do the physical work, whether that's extending a rod, gripping a part, or rotating a mechanism

• Valves – directional control valves, solenoid valves, and process valves that manage where and when air flows through a system. These act as the switching layer that controls the sequence of movements

• Couplings and fittings – quick-connect couplings, push-in fittings, and hose tails that join everything together and allow lines to be connected and disconnected quickly without tools

• Tubing and hose – the flexible lines that carry compressed air between the compressor, valves, and actuators

If a component's job is to store, move, control, or use compressed air, it's classed as pneumatic.

Our Pneumatic Range

At Suttons Ross, our pneumatic stock includes:

• Quick connect pneumatic and breathing air couplings

• Air preparation and condensate management equipment

• Pneumatic cylinders and valves

• Process and control valves

• Push-in fittings

• Tubing, hose, and ducting

We stock trusted brands including Festo, Parkair, and Sicomat, so whether you're maintaining an existing system or specifying a new one, there's a good chance we already carry what you need.

Our sales counter team can help you identify the right part for your system, whether that's matching a single fitting, sourcing a replacement valve, or working out the right specification for a full setup. If you're not sure what you need, bring in the old part or give us a call. We'll match it against our stock or talk through the alternatives, and where something needs repair rather than replacement, our in-house workshop can take a look.

FAQs

Can the same fittings be used for hydraulics and pneumatics?

Some fitting types look similar, but hydraulic and pneumatic components are rated for different pressures and media, so they're not interchangeable. Always check the rating before substituting one for the other.

Do you repair pneumatic equipment as well as hydraulic?

Yes. Our in-house workshop covers pneumatic repairs alongside hydraulic ram, pump, and motor repairs.

What's the difference between a directional control valve and a solenoid valve?

A directional control valve manages the path air takes through a system, while a solenoid valve is a specific type of directional valve operated electrically. Most pneumatic systems use solenoid valves for automated control.