Pneumatic Cylinders – Air Cylinders to ISO 15552 and CETOP
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ISO 15552 Cylinder FMY (Ø32-Ø100)
ISO 15552 profile cylinder, magnetic piston, adjustable cushioning
CETOP RP 43P Cylinder PAG-PAGY (Ø32-Ø100)
Aluminium-body CETOP cylinder for industrial automation
CETOP RP 43P Cylinder PNS-PNSY (Ø32-Ø100)
Durable cylinder structure for tough field conditions
ISO 15552 Cylinder FMY (Ø125-Ø320)
Easy integration with standard-compliant connection options
CETOP RP 53P Cylinder PNS-PNSY (Ø125-Ø320)
High-strength body design, long service life
What Is a Pneumatic Cylinder?
A pneumatic cylinder — also called an air cylinder or pneumatic piston — turns compressed-air pressure into straight-line motion. It consists of a tube, a piston with seals, a piston rod and two end caps with air ports. In a double-acting cylinder air drives the piston in both directions; a single-acting cylinder uses air in one direction and a spring to return.
Because compressed air is available in almost every factory, pneumatic cylinders are the most common actuators in packaging, food processing, textile, automotive assembly and robotics. They are fast, clean and easy to control with standard valves and, with a magnetic piston, their position can be read by sensors mounted on the tube.
Pneumatic Cylinder, Air Cylinder or Pneumatic Piston?
They are the same product. “Pneumatic cylinder” is the engineering term, “air cylinder” is common in North America and in maintenance, and “pneumatic piston” is how many buyers — and many Spanish- and Turkish-speaking markets — describe the whole cylinder, although strictly the piston is the part inside the tube that the air pushes. When you search for any of them, you are looking for an actuator that turns compressed air into linear motion.
Fenitsa Pneumatic Cylinder Series
| Series | Standard | Body | Bore | Stroke |
|---|---|---|---|---|
| FMY | ISO 15552 | Profile body, magnetic piston, sensor slots | Ø32–Ø100 mm | 50–500 mm standard; to order up to 3,000 mm |
| FMY large bore | ISO 15552 | Profile body | Ø125–Ø320 mm | 50–500 mm standard; to order up to 2,800 mm |
| PAG-PAGY | CETOP RP 43P | Aluminium | Ø32–Ø100 mm | 50–500 mm standard; to order up to 3,000 mm |
| PNS-PNSY | CETOP RP 43P | Steel | Ø32–Ø100 mm | 50–500 mm standard; to order up to 3,000 mm |
| PNS-PNSY large bore | CETOP RP 53P | Steel | Ø125–Ø320 mm | 50–500 mm standard; to order up to 2,800 mm |
Need a special stroke, double rod, tandem or adjustable-stroke design? See pneumatic cylinder manufacturer and custom cylinders.
Pneumatic Cylinder Bore Sizes and Force Chart
Fenitsa ISO 15552 and CETOP cylinders come in eleven bores from Ø32 to Ø320 mm, each with a fixed rod size. The table gives the theoretical push force; pull force is lower by the rod area, and real output is roughly 10 % below theory because of seal friction.
| Bore | Rod | N @ 4 bar | N @ 6 bar | N @ 8 bar | kgf @ 6 bar | lbf @ 6 bar (87 psi) |
|---|---|---|---|---|---|---|
| Ø32 mm | Ø12 mm | 322 | 483 | 643 | 49 | 108 |
| Ø40 mm | Ø16 mm | 503 | 754 | 1,005 | 77 | 170 |
| Ø50 mm | Ø20 mm | 785 | 1,178 | 1,571 | 120 | 265 |
| Ø63 mm | Ø20 mm | 1,247 | 1,870 | 2,494 | 191 | 420 |
| Ø80 mm | Ø25 mm | 2,011 | 3,016 | 4,021 | 308 | 678 |
| Ø100 mm | Ø25 mm | 3,142 | 4,712 | 6,283 | 481 | 1,059 |
| Ø125 mm | Ø32 mm | 4,909 | 7,363 | 9,817 | 751 | 1,655 |
| Ø160 mm | Ø40 mm | 8,042 | 12,064 | 16,085 | 1,230 | 2,712 |
| Ø200 mm | Ø40 mm | 12,566 | 18,850 | 25,133 | 1,922 | 4,238 |
| Ø250 mm | Ø50 mm | 19,635 | 29,452 | 39,270 | 3,003 | 6,621 |
| Ø320 mm | Ø63 mm | 32,170 | 48,255 | 64,340 | 4,921 | 10,848 |
Working pressure range: 1.5–10 bar. For push and pull at any pressure use the pneumatic cylinder force calculator.
Air Consumption
| Bore | Litres per double stroke | L/min at 10 cycles/min |
|---|---|---|
| Ø32 mm | 1.11 | 11.1 |
| Ø40 mm | 1.74 | 17.4 |
| Ø50 mm | 2.72 | 27.2 |
| Ø63 mm | 4.32 | 43.2 |
| Ø80 mm | 6.96 | 69.6 |
| Ø100 mm | 10.87 | 108.7 |
| Ø125 mm | 16.99 | 169.9 |
Values ignore the rod volume and hose dead volume, so they are slightly conservative for compressor sizing. Multiply linearly for other strokes and cycle rates.
Single and Double Acting Pneumatic Cylinders
- Double acting pneumatic cylinders — air in both directions; every Fenitsa catalogue series, with push and pull force from Ø32 to Ø320 mm.
- Single acting pneumatic cylinders — spring return or spring extend, built on request; net force = air force minus spring force.
ISO 15552 or CETOP?
Choose ISO 15552 when cylinders must be interchangeable with other manufacturers’ ISO cylinders or carry position sensors; choose the aluminium CETOP PAG series for economical, lightweight machines, and the steel PNS series for dusty, humid or impact-prone environments and very large bores.
Supplying the Middle East, Europe and the Americas
Fenitsa ships pneumatic cylinders to customers across the Middle East, Europe and the Americas. Road and sea freight are arranged per order, depending on weight, urgency and destination.
Quotations state price, production lead time and the agreed Incoterm (for example EXW, FCA, CPT or CIF). Shipments are packed for export with plugged ports and protected rods, and commercial invoice, packing list and certificate of origin are prepared with each order.
Pneumatic Cylinders – FAQ
What is a pneumatic cylinder?
A pneumatic (air) cylinder converts compressed-air pressure into linear motion. Air entering one side of the piston pushes it and the rod out; in a double-acting cylinder air on the other side pulls it back. Pneumatic cylinders are fast, clean and simple, which makes them the standard actuator in factory automation.
How much force does a pneumatic cylinder produce?
Force equals pressure times piston area. At 6 bar (87 psi) a Ø50 mm cylinder pushes about 1,178 N (120 kgf) and a Ø100 mm cylinder about 4,712 N (481 kgf). Real force is roughly 10 % lower because of friction.
What is the difference between a pneumatic cylinder and a hydraulic cylinder?
Pneumatic cylinders run on compressed air at typically 6–10 bar: fast, clean and inexpensive, but limited in force and less precise under varying loads. Hydraulic cylinders use oil at 100–250 bar or more, producing far higher force with stiff, controllable motion.
What does ISO 15552 mean?
ISO 15552 standardises the mounting dimensions of pneumatic cylinders from Ø32 to Ø320 mm, so ISO cylinders from different manufacturers fit the same mountings. Fenitsa’s FMY series is built to ISO 15552.
Can pneumatic cylinders be used in food processing?
Yes — pneumatic actuators are widely used in food and beverage lines because they are clean and simple. For direct food contact or wash-down areas, specify the environment when you ask for a quotation so that seals, surface finish and lubrication can be selected accordingly.
How do I calculate air consumption?
Air per double stroke ≈ (piston area × stroke + annulus area × stroke) × (p + 1.013) / 1.013. Multiply by cycles per minute to get free-air consumption in litres per minute.
