ST-3 Noise Attenuation trim works to reduce control valve noise in a broad spectrum of gas applications. ST-3 trim has two variants: the first is a one or two-stage design that reduces noise levels up to 15 dBA, the second is a multi-stage design for more extreme noise reduction up to 30 dBA. ST-3 works by controlling both pressure and velocity of the gas through the valve, thereby reducing turbulence, which is the culprit of all aerodynamic control valve noise. Multi-stage ST-3 reduces pressure with a concentric cylinder design similar to the ST-2 anti cavitation trim.
Technical Specifications
| Type: | ST-3 Noise Attenuation Trim |
| Base Valve: | Optimux OpGL Globe or Angle Body |
| Size Range: | 1” to 32” |
| CV Range: | 1 to 3220 |
| Flow Direction: | Flow Under |
| Pressure Stages: | 1 to 6 |
| Features: | • Effective attenuation of up to 30 dBA of noise • 1 or 2 stage cartridges fit a standard OpGL without modification |