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Gaseous noise trim

07 February 2008

Flowserve, a provider of fluid motion and control products and services, has announced the release of Flowserve Valtek StealthT, a patented gaseous noise trim that reduces sound pressure levels in the most demanding applications.

"Three years of field service have proven the technologies behind Stealth's advanced design," said Bradford Haines, product manager at Flowserve. "We've developed a highly effective device capable of reducing noise up to 40 decibels in severe service where noise and excessive vibration can damage both human hearing and equipment."

Stealth laser-cut discs are stacked to form the seat retainer. The cuts in the discs form channels for the fluid to pass through. Building on technologies from the field-proven Flowserve Valtek TigerToothT trim, flow through the Stealth expands and contracts as it passes through the seat retainer creating gradual, controlled pressure drops.

Stealth's patented design gradually reduces pressure without generating high velocities, which is critical in noise reduction. In addition to reducing the pressure gradually, Stealth utilises a frequency shifting technology to further reduce audible noise. Flowserve's new WaveCracker technology utilises irregularly shaped cross-sections and improves noise reduction significantly over current designs.

The Stealth trim noise attenuator combines pressure reduction, velocity control, and noise elimination features to significantly reduce the noise caused by high pressure drops. Covered by three unique patents, Stealth is one of the most effective noise reduction trims for control valves.


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