Discover the Fisher™ WhisperFlo™ Aerodynamic Noise Attenuation Trim, designed to reduce noise by up to -40 dBA to -50 dBA in high-pressure drop gas & steam applications. Explore features & technical specs.
The Fisher™ WhisperFlo™ Aerodynamic Noise Attenuation Trim represents a highly advanced solution for controlling noise in demanding fluid control applications . It is specifically engineered for severe service applications involving gases, steam, or vapors where high-pressure drops typically generate significant aerodynamic noise .
This trim technology utilizes a unique combination of three-dimensional flow channels, pressure staging, and special passage shaping to balance energy dissipation effectively . By managing the fluid dynamics that cause noise at the source, it protects equipment and piping from potential damage caused by excessive vibration and high sound pressure levels, thereby ensuring operational safety and regulatory compliance .
Superior Noise Reduction: Achieves noise attenuation of up to -40 dBA, with reductions of up to -50 dBA possible for particularly demanding applications . This significantly contributes to a safer working environment.
High Flow Capacity: The WhisperFlo™ trim provides higher flow capacity compared to traditional maze-style flow designs for the same valve travel and port size, allowing for potential downsizing of valve bodies and associated cost savings .
Easy Maintenance & Retrofit: Designed for quick and easy inspection and replacement without the need to remove the valve body from the pipeline. It is interchangeable with standard control valve trim, simplifying upgrades and maintenance procedures .
Enhanced Durability: Standard hardened materials or unique wear-resistant surface structures provide excellent resistance to wear, ensuring a longer service life and reduced total cost of ownership .
Advanced Design: The innovative design, potentially leveraging modern manufacturing techniques like 3D printing, optimizes internal flow paths for efficient noise control and improved flow efficiency .
Power Generation: High-pressure steam letdown systems, turbine bypass systems.
Oil & Gas / Hydrocarbon Processing: Compressor anti-surge control, gas pipeline transmission, export combustion.
General Industry: Any severe service application with high-pressure drops in gas or steam service where noise is a concern.
| Attribute | Specification |
|---|---|
| Brand | Fisher™ |
| Trim Model | WhisperFlo™ Aerodynamic Noise Attenuation Trim |
| Primary Function | Noise Suppression / Aerodynamic Noise Attenuation |
| Noise Reduction | Up to -40 dBA, with special applications up to -50 dBA |
| Service Media | Gas, Steam, Vapor |
| Flow Characteristic | Linear |
| Key Technology | 3D flow channels, Pressure staging, Special passage shaping |
| Interchangeability | Interchangeable with standard control valve trim |
| Material | Hardened Materials (Standard) |
For further technical details, specific compatibility information, or to discuss your application requirements, please do not hesitate to contact the sales team at Kateteco. We are here to provide you with the ideal solution for your demanding flow control needs.









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KateTeco (Tianjin) Technology Co., Ltd. serves as an outstanding partner in the field of industrial fluid automation, specializing in the introduction and integration of high-end valves and instruments. We are committed to providing customers with safe, reliable, and intelligent system solutions. By leveraging global leading product resources and supported by systematic professional training and on-site technical assistance from Emerson’s experienced engineers, we ensure that customers can respond promptly and accurately to technical challenges.
With full lifecycle services covering installation, commissioning, operation, maintenance, and replacement, we deliver a true one-stop service system. This allows our customers to enjoy seamless, efficient, and high-quality assurance, supporting enterprises in achieving stable operation and continuous upgrades.


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