Pressure-resistant to 150 bar, friction-optimised, from 1 mm shaft diameter — designed and manufactured in our own plant in Übach-Palenberg, Germany. From a batch size of one.
Too much friction. Too little installation space. Pressure a catalogue part can no longer take. A shaft you would rather not harden or hard chrome plate. That is exactly where our work begins — from the seal design through to series production.
Applies under appropriate operating conditions. For higher pressures, higher circumferential speeds or abrasive media we design the seal individually.
In a typical gearbox in a production environment a DIN seal draws around 60 W of friction power per shaft. A comparable VR seal draws 20 W. Check it with your own figures.
Basis of calculation: 40 W of friction power saved per sealing point (60 W DIN against 20 W VR), CO₂ factor 0.512 kg per kWh. Figures from our own measurement on a typical gearbox — your actual saving depends on speed, lubrication and operating temperature. We are happy to work through your specific case.
541 available dimensions to DIN 3760 — shaft diameters from 1 to 635 mm, close DIN coverage up to 560 × 600 mm.
For standard tasks and confined installation spaces. DOA is only half as wide as DIN 3760 and starts at 1 mm shaft diameter; SOA takes up to 150 bar. BSB and MSB are our alternatives to ISO 6194.
SAB has two lips facing the same direction and extends service life. SAC, MSC and MAC separate two media, or seal vacuum and pressure in a single component. The space between the lips can be lubricated.
Replacing an existing seal without changing the installation space? These designs reproduce common geometries to DIN 3760 — a match for the housing you already have.
Unusual dimension, unusual medium, unusual temperature. Send us the installation situation as a drawing or a model and we will tell you what is feasible.
The patented two-component sealing lip bonds elastomer and PTFE permanently: the elastomer provides the flexibility, the applied PTFE membrane reduces friction by a further 50 to 70 % — depending on the friction conditions. Add to that much improved dry-running behaviour, less heat generation, lower leakage and a higher permissible circumferential speed. Available in DOA, DOB, SOA, SAB and SAC up to a housing diameter of 110 mm.
To the VR Low Friction seal
The limits apply individually, not simultaneously. The temperature range is determined by the elastomer selected.
| Characteristic | Unit | VR standard | VR high performance SOA |
|---|---|---|---|
| Circumferential speed vmax | m/s | 40 | 40 |
| Pressure pmax | bar | 15 | 150 |
| Temperature range | °C | −50 … 260 | −50 … 260 |
| Temperature range | °F | −58 … 500 | −58 … 500 |
| Shaft diameter D1 | mm | 1 – 635 | 1 – 635 |
| Dimensions | — | DIN 3760 | DIN 3760 |
Special case, double lip SAC: 15 bar on the cap side, 10 bar on the disc side. Complete dimension tables are in the technical catalogue.
Six industries in which standard parts regularly reach their limit — and in which we have been designing seals for years.
Hygienic design: no cavities, no bonding agents, a smooth transition to EHEDG and DIN EN 1672-2.
For more precise process control, compressed air and vacuum had to be fed into a rotating fixture — ideally through one shared channel. To make matters harder, the available torque was tightly limited by a magnetic coupling.
The VR radial shaft seal, design SAC, was the answer: two opposing sealing lips separate the two states, and the low friction power fitted the tight torque budget.
More on rotary unions
In-house production across the whole value chain — apart from compounding the materials. Direct sales for customer-specific solutions, selective distribution for standard applications.
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Made in Germany
Five fields are enough to begin with. Design data — speed, pressure, medium, temperature — we can clarify in conversation, or you send the drawing along straight away.
Prefer to talk directly? Book a consultation — 20 minutes, no obligation, with someone who does the seal design himself.