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Displacement Products

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Airpot Corp’s displacement products include Self-Aligning Pneumatic Actuators and basic Piston / Cylinder Sets that are constructed using a graphite piston / borosilicate glass cylinder combination in which each piston is selectively matched to fit the cylinder with extremely close clearances. They have unparalleled low friction, responding to forces as low as only a few grams and pressures less than 0.2 psi. Starting and running friction are almost identical, preventing jerky, uncontrolled starts and providing uniform smoothness throughout the full stroke of the device.

Airpot Actuators operate as low friction air cylinders, but also have uses as pumps and pressure sensors.  The most compact of the Airpot actuator line, they have self-aligning capability and offer very low mass for super responsive motion. They make possible accurate force sensitivity and actuation with uniform motion, allowing amazingly smooth movement and pressure sensing operation even over distances less than 0.1 inch and cycle rates ranging from very slow to very high speeds- up to 10cps or more. They can be used to dispense small volumes of air, sense a flow, generate airflow or air pressure, or accurately provide a visible volume indication with ease. Airpot self-aligning pneumatic actuators are ideal for pumping small volumes of air or generating low pressures with minimal energy use. These lightweight compact actuators are also great for devices requiring portability.

When designing with our accurate force pneumatic displacement products, here are the main functional differences to consider:


  • Self Aligning and ready to mount
  • Compact
  • Single acting (can be pressurized in extension direction only but can be returned with vacuum)
  • Can be used to generate vacuum or pressure for pumping applications

Piston and Cylinder Sets:

  • Basic building blocks ready for your own mounting design
  • Linear and rotary motion capability-even simultaneously
  • Varied configuration and design choices
  • Most easily customized
  • Lowest cost components
  • Totally non-metallic
  • Low mass
  • Transparent cylinder provides visible piston position

Product Lineup

Piston Cylinder sets

Airpot Piston Cylinder sets
Airpot Corp’s piston and cylinder kits make great building blocks for engineers who have need for customized mechanical or pneumatic devices. The kits feature Airpot’s borosilicate glass cylinder and graphite piston material technology which allows the use of extremely tight tolerances to achieve a high precision fit and control of leak while offering a seal-less, self -lubricating pneumatic or light-load bearing device. Each piston and cylinder set is individually matched for optimal performance. The ultra low friction pistons will respond to single gram forces and low pressures of less than 0.2 psi. Stiction is virtually eliminated, meaning nearly identical starting and running friction, and providing movement that is uniformly smooth and consistent from the start and throughout the device’s full stroke cycle.

Airpot piston and cylinder kits are unaffected by extreme temperature variations, run clean and do not contaminate surrounding components. No piston seals are required, and there are no liquids or lubricants to leak. Materials used are capable of exceedingly high cycle rates. They do not heat up or materially change under conditions of rapid and/or continuous cycling and have a life-span of multi-millions of cycles.

Innovative designers use Airpot piston and cylinder kits as linear bearings, vacuum pickups, inertia sensors, portable piston pumps, position sensors, spool valves, flow indicators, pressure sensors, dispensers, pneumatic calibration devices, Stirling Engine power pistons, and for many other demanding applications. Airpot piston and cylinder kits exhibit very low mass, no deterioration or change in performance due to age or non-use, have the ability to move linearly and rotationally simultaneously, and use a clear, see-through cylinder. When driven by pressurized air, maximum performance can be enhanced when used in conjunction with Airpot’s precision FFR low pressure filter/regulator products.

The cylinders are available in bore sizes ranging from 0.220” to 1.75”, and lengths from the desired stroke plus 0.325” to the desired stroke plus 0.880”. All models exhibit friction of less than 1 gram (in the absence of side loads).

Self-Aligning Actuators

Airpot Self-Aligning Actuators
Airpot Corp. pneumatic actuators have an outstanding ability to perform functions that go far beyond conventional actuators that can only provide a motive force. Because of the Airpot Actuator’s unique combination of materials, many engineers have found them to be equally well suited to a variety of applications that we call “displacement” related .

Employing our borosilicate glass cylinder and graphite piston technology, Airpot Actuators have amazing performance properties with respect to friction, cleanliness, and temperature range. They are light weight, compact, use no lubricants, and the piston/rod assemblies have very low mass. This unusual range of characteristics give our actuators performance capabilities that allow them to be used in uncommon, even novel ways that would be impossible with conventional air cylinders. For example, in addition to uses involving response to pressure or vacuum, Airpot Actuators can also provide functions involving displacement of a volume, such as for pumping, measuring, sensing, and indicating pressure or vacuum changes. Furthermore, since the cylinder is clear glass, the Airpot Actuator can even be used to provide a see-through, visual reference for pressure related volume and stroke changes.

Of course, Airpot actuators are equally superior to conventional cylinders for applying a precise force, a repeatable motive or counterbalancing force, applying a gentle or precise holding or squeezing force (as low as a few grams) and for actuation with uniform motion at almost any speed. They are ideal for requirements involving the need to move something slowly and smoothly, even over distances less than 0.1 inch, or to cycle at very high speeds- up to 100 cps.

We encourage engineers working on any new or novel design involving displacement or pneumatic actuation to contact us for assistance and information about the Airpot Actuator’s unusual and wide range of capabilities.

For more information about these products…
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