Mechanical seals for chocolate and high-viscosity products

Chocolate, creams, spreads and other high-viscosity products can create demanding conditions for mechanical seals.
Sticky, dense and thermally sensitive products may lead to product build-up, deposits on seal faces, sticking of rotating parts, accelerated wear and unexpected downtime, especially in continuous food processing applications where hygienic design and reliable cleaning are essential.
For a modern European facility producing one of the world’s most iconic chocolate-based spreads, Huhnseal developed a custom Knife Edge mechanical seal designed for aggressive, sticky and high-viscosity fluids.
The optimized seal face geometry helps reduce product accumulation near the seal faces, supporting more effective cleaning, improved reliability and smoother production.
This case shows how the right sealing solution is not simply a standard component, but the result of application knowledge, collaboration and tailor-made engineering.
Read the full case study: A custom solution for a global icon of sweetness