Technical guides
Technical guides, advice and news on hydraulic and pneumatic seals: choosing, materials, maintenance and applications.
Rod seals: how to choose the right one
The rod seal is the first barrier against oil leaking out of the cylinder. Here is how to choose it according to pressure, speed, temperature and groo...
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Piston seals: single or double acting?
The piston seal separates the two chambers of the cylinder and turns pressure into force. Here are the differences between single and double acting an...
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Wiper seals: the first line of defence for a hydraulic cylinder
A wiper costs little but protects the whole cylinder: it keeps dust, mud and water from entering with the rod. Here is how to choose the right one.
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O-rings: a guide to sizes, cross-sections and materials
The O-ring is the simplest and most widespread seal in the world, but choosing it well requires attention to inner diameter, cross-section, material a...
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Guide rings: why they are essential in a cylinder
Guide rings do not seal anything, but without them no seal lasts long. Find out what they do, which materials exist and how to choose them.
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How to measure a hydraulic cylinder to order the right seals
Ordering the wrong seals wastes time and money. With a caliper and a few precautions you can take all the necessary measurements: here is how, step by...
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Oil seals and rotary shaft seals: a selection guide
Motors, gearboxes, pumps and hubs have one thing in common: the oil seal. Find out how it works, which versions exist and how to choose the right one...
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Static seals and V-rings: small components, great reliability
They do not move, or barely move, but if they fail the system leaks. Here is how static seals and V-rings work and how to choose them correctly.
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