Technical articles on sealing technology
Materials, seal design, test reports and projects from practice — written by the people who design the seals themselves.
Replacing a gland packing: special seal 235/275 mm for a tumble dryer
A shaft penetration subject to German clean-air rules at 200 °C and 3.5 bar. Why an engineered seal works better here than an adjustable packing.
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HNBR rotary shaft seals in bean-to-cup coffee machines
Cleaning agents, descalers and steam hit the sealing lip on every cleaning cycle. Which elastomer stands up to that — and when FKM or EPDM is the better choice.
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Sealing unhardened stainless steel shafts efficiently
Unhardened stainless steel is corrosion-resistant but soft. Where VR seals work with no post-treatment — and where, honestly, the limit lies.
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A rotary shaft seal for a 1 mm shaft diameter
How small can a seal go? A project from medical technology and the food industry shows where the manufacturing limit lies.
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Supporting the BRS Motorsport team
Formula Student at Bonn-Rhein-Sieg University: how friction-optimized seals make a planetary gearbox inside a 10-inch wheel possible.
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Rotary shaft seals and the PFAS regulation
PFAS are under regulatory pressure. Which materials we offer as alternatives — and where the limits are.
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IP69K with VR seals: the test report
In-house test of an SAB 12 28 at 100 bar water pressure and 80 °C. The result hangs on one detail: the protective cover.
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Glossary of sealing technology
Seal types, materials, characteristics and the rules of the food industry — the terms that appear in data sheets and tenders.
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Optimizing rotary unions with VR seals
Rotary unions transfer media between stationary and rotating parts. The seal decides friction, service life and maintenance effort.
Read onSealing gap behavior of pressure-resistant rotary shaft seals
Why the annular gap ds decides whether a seal holds 150 bar or is destroyed — the technical basis of the SOA design.
Read onHygienic design in the food industry
Materials, approvals and designs for machines that are cleaned every day — and what EHEDG and DIN EN 1672-2 actually require.
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Sustainability by design
Eight pledges that follow from the design — and why metal and elastomer can be separated here without chemistry.
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