Brochure

12 | The Silent Treatment
combines the efficiency of a rotary valve with noise control trim to provide improved performance for demanding applications.
This design is used to reduce aerodynamic noise for steam, gas, and vapor applications. The Vee-Ball control valve features an
attenuator welded on the back of the V-notch ball, which separates the flow into multiple smaller jets, reducing flow turbulence.
Precise contouring of the V-notch ball provides an approximately equal percentage inherent flow characteristic, which is optimal
for most flow control applications.
n Up to 10 dBA of attenuation
n ASME Class 150–600
n NPS 4–20
PRODUCTION: Ethylene
APPLICATION: Steam pressure-reducing valve
CHALLENGE: The previous control valve experienced excessive noise due to a demanding ow and pressure
drop application.
SOLUTION: Fisher NPS 12 Vee-Ball control valve with rotary attenuator.
RESULTS: Field noise measurements indicated the rotary attenuator achieved attenuation of -8 to
-10 dBA, which was on target with the customer requirement.
PROVEN RESULTS
Fisher
®
Vee-Ball
™
Control Valve with Rotary Attenuator