Pasia’s Aero Engine Honeycomb Seal Secures First Flight-User Trial Certification

Pasia has announced that its vacuum-brazed nickel superalloy honeycomb seal has successfully obtained its first trial qualification certification from an aircraft user. This milestone marks a significant step in the product’s entry into the commercial aero-engine supply chain.

Certification Significance

The certification follows rigorous evaluation by the flight-user, validating the honeycomb seal’s performance under real-world aero-engine operating conditions. The product, manufactured under the VBHSTT model designation, integrates nickel-based superalloy materials, precision vacuum brazing technology, and a full-process quality traceability system .

Next Steps

Pasia plans to advance the product from trial certification to broader production qualification. This includes transitioning from single-engine trial validation to full-platform supply, expanding its qualified product catalog to cover additional aero-engine platforms, and scaling production capacity to meet anticipated demand from both commercial aviation and industrial turbine markets .

Product Advantages

The honeycomb seal delivers substantial performance improvements over conventional labyrinth seals:

Parameter Traditional Labyrinth Seal Pasia Honeycomb Seal
Gas-path leakage loss Baseline 50–70% reduction
Operating temperature Limited Turbine-stage capable (900°C+ long-term)
Blade protection None Abradable sacrificial layer
Process traceability Limited Full-chain traceable

The seal’s hexagonal honeycomb core serves as a sacrificial abradable layer, allowing blade tips to cut a precise running clearance during initial operation. This “active wear” design protects expensive turbine blades while enabling minimal radial clearances .

Additional Applications

Beyond aero engines, the honeycomb seal technology is deployed in:

· Power Generation Gas Turbines: Reduces parasitic leakage, lowering heat consumption by approximately 5 grams of standard coal per kWh
· Industrial Steam Turbines: Enhances rotor stability and protects blade tips from moisture erosion
· Wind Tunnel and Compressor Systems: Improves flow straightening and reduces aerodynamic losses
· EMI/RFI Shielding: The metallic honeycomb structure functions as an electromagnetic interference shielding vent