Approved materials
Tested rubbers for food contact: compliant with FDA 21 CFR 177.2600 and with EC Regulation 1935/2004. Metal-detectable grades on request.
Food industry
When the seal stops production
A kneading machine that has failed, an agitator standing still, a leaking rotary union: the cause is often at the sealing point. We build radial shaft seals for machines that are cleaned every day — materials compliant with FDA and EC 1935, hygienic design, from a batch size of one.
Discuss your applicationRequest the catalogue60-page PDF · 541 sizes
The situation
A failure rarely stays on its own
What starts at a single sealing point sets off a chain in food production.
Deadlines
Unplanned downtime
Delivery dates come under threat, and the cost of downtime runs from the first minute — regardless of how small the defective part is.
Effort
Tied-up resources
Every failure ties up maintenance, shift planning and scheduling. That time is missing somewhere else.
Hygiene
A standard at risk
A leak puts the hygiene requirements in doubt — and with them product quality and your customers’ trust.
What we set against it
Five properties that matter at this sealing point
Hygienic design
Designed with no cavities and no undercuts in which product residues can lodge. The transition between metal and elastomer runs without a step and the seal is easy to clean — to EHEDG and DIN EN 1672-2.
IP69K cleaning
High-pressure cleaning is routine on these machines. We tested an SAB 12 28 in house at 100 bar water pressure and 80 °C and published the test report — including the detail on which the result actually depends.
Lower friction power
A VR seal draws about one third of the friction power of a standard shaft seal; with the Low Friction sealing lip it falls by a further 50 to 70 per cent. That means less wear, lower energy costs and longer maintenance intervals.
Separable and recyclable
There is no chemical bond between metal and elastomer. The materials can be separated by type and the support body can be reused. This is not an environmental measure added afterwards; it follows from the design.
From practice
When the seal itself becomes the foreign body
A plant builder found red, yellow and black particles in his filling stations. The trail led to the rotary union.
The solution
Redesigned instead of reordered
A spare part would have repeated the problem. Instead we redesigned the sealing point:
- V-ring solution with minimal dead space — no gap in which product can lodge
- FKM to FDA and USP Class VI
- media-resistant, CIP- and SIP-capable
- temperature-resistant to 230 °C
- food-grade FFKM on request for more aggressive media
- metal-detectable on request
The result
Four things that changed
- No more foreign particles in the downstream filters
- Longer service life
- Less maintenance effort
- Lower energy consumption
The customer prefers not to be named. If you have a comparable problem with a rotary union, send us the installation situation — we will take a look.
Where they are used
Where our seals sit in food production
- Kneading machines and mixers
- Agitators
- Conveyor belts and screw conveyors
- Filling and packaging lines
- Rotary joints and rotary unions
- Centrifuges and separators
- Drying plants
- Pumps
Working together
From advice to series production
We are a manufactory. That means there is no minimum order quantity standing in the way of a design, and no catalogue for us to hide behind.
Step 1
Understand the sealing point
Medium, pressure, diameter, speed, temperature — plus the cleaning process and the approvals required. Five pieces of information are enough for a first answer on feasibility.
Step 2
Make a sample
Toolmaking and production are in house in Übach-Palenberg. That is why, from a batch size of one, we can do what elsewhere needs a minimum quantity.
Step 3
Into series production
If the sample holds, it goes into regular supply — in the same tools, with the same tests.
Technical catalogue 2024/25
Every design, material and size in one PDF
60 pages of design know-how: pressure and p-v diagrams, design guidelines, the elastomer overview and the complete size table with 541 sizes. You receive the link by e-mail straight away.
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