Fisher™ Whisper Technology

Key Features:

• Up to -20 dBA acoustical attenuation is achievable depending on service conditions
• Provides up to 80% more noise attenuation than other rotary valves
• Optimized inlet contour minimizes flow capacity reductions and noise caused by turbulence
• Elliptical channels allow for optimal flow separation by changing the shape of the flow stream as the ball rotates
• Increased flow area of holes between trim channels improves pressure distribution and reduces velocities of process material 
• Compatible with gas, vapor, or steam, and is offered in multiple valve sizes and pressure class ratings.
• The additively manufactured attenuator features a rugged fabrication weld to provide structural integrity

Key Features:

• Optimized design allows for up to 30 dBA noise reduction with maximized flow efficiency
• Provides 20% more flow capacity than previously possible, allowing smaller globe valves to be applied where facility space was previously limited
• Additively manufactured lattice trim design eliminates jet structure limitations and increases flow capacity
• Compatible with gas, vapor, or steam, and is offered in multiple valve sizes and pressure class ratings
• Quick change trim allows fast and easy inspection of the cage without taking the valve body out of the pipeline
• Hardened materials of construction are standard to provide exceptional wear resistance

Key Features:

• Allows for up to a 10-15 dBA noise reduction with a negligible pressure drop and no impact on process flow
• Used in applications downstream of control valves or any other equipment contributing to system noise
• Patented design with internal acoustic cavities of varying sizes reduce noise across a broad range of frequencies
• Cast internal drain channel ensures any potential liquid buildup can be removed, ensuring optimum performance
• Straight-through flow geometry, with inside diameter that matches the pipe, accommodates pigging operations when required for cleaning and maintenance
• Designed for a wide range of fluid flow rates, pressures and temperatures
• Easy maintenance and installation with the removable cylindrical stainless-steel screen and threaded lifting provisions