Labyrinth seal increases efficiency in severe service
The Arlon 4020 Labyrinth Seal has a controlled thermal expansion over a wide range of temperatures, and has a uniquely engineered tooth profile that make it a cost-effective and long-lasting seal choice. Customer test results show up to a 1.5% gain in efficiency compared to traditional seals, correlating with field tests and predictions from finite-element analysis (FEA). Non-contacting labyrinth seals reduce leakage in centrifugal applications. This is accomplished by restricting flow through a series of chambers formed between the rotating element while the teeth control the passage of the media. The improved performance is said to be due to the innovative combination of custom-engineered tooth designs and high-performance PEEK (polyether ether ketone) thermoplastic materials. The materials reduce friction and eliminate galling, which extends the seal’s life and lowers maintenance costs. The erosion and corrosion resistance make the Arlon 4020 suitable for severe sealing applications. — Greene Tweed, Landsdale, Pa.