CASE STUDY: Knife gate valve seal rings
THE PROBLEM:
One of our mining clients was facing a recurring and costly issue with their knife gate valves operating in a highly abrasive slurry environment. The standard seal rings within these valves were wearing out prematurely due to the coarse nature of the slurry. This rapid wear not only led to frequent seal replacements but also caused damage to the valve body itself—forcing the client to replace entire valve assemblies on a regular basis. The downtime, replacement costs, and operational disruptions were becoming unsustainable.
THE ARANZU PROCESS:
At Aranzu, we believe that even proven technologies can be reimagined to better serve demanding applications. After a detailed review of the operating conditions and valve design, our team evaluated the root causes of the failures and explored opportunities to improve the lifespan and protection of critical valve components.
Rather than suggesting a complete redesign, we focused on upgrading a key element—the seal ring—using advanced materials and better sealing technology to address the heart of the problem.
THE ARANZU SOLUTION:
We developed a custom seal ring solution designed to retrofit directly into the client's existing knife gate valves—eliminating the need for expensive valve replacements. These new seal rings are manufactured from Aranzu’s proprietary cast wear-resistant alloy, specifically engineered to endure aggressive slurry conditions.
To further enhance performance, we integrated a cast polyurethane face seal into the ring. This embedded sealing surface ensures a tight closure while shielding the polyurethane from direct wear, significantly extending its service life.
The result? A longer-lasting seal ring that:
- Protects the valve body from abrasive damage
- Reduces overall valve replacement frequency
- Minimises downtime and maintenance costs
- Offers a drop-in solution compatible with a wide range of knife gate valves
Even the best industrial components can benefit from targeted innovation. Aranzu’s upgraded seal ring design proves that with the right material, science and engineering approach, persistent problems can become long-term solutions.
If you're operating in harsh slurry environments and facing similar issues, our team is ready to help.