The gas exiting a control valve at high velocity into some piping configurations is a major sourceof noise and vibration. Vortices form in the largersections of the piping or headers adjacent to the main flow path. The formation of these vortices is detrimental for three reasons:

1. A vortex requires energy which will be obtained at the expense of the main flow path to keep it in motion.

2. A vortex has a negative velocity aspect in that the gas molecules in the vortex spin around and collide with the incoming gas molecules head-on.

3. A vortex is not stable and in fact pulsates,inducing noise and vibration into the pipeitself. The pulsation and vibration created by these intense vortices can have a detrimental effect on operations and a drastic effect on measurement.

Welker in-line diffusers are designed to produce
a constant velocity profile which reduces turbulence, thereby reducing noise and vibration.

Welker in-line diffusers are specifically designed
for each application. Call Welker Engineering Company today for solutions to your noise and vibration problems.

In the application illustrated to the left, a Welker in-line diffuser is used to reduce turbulence when stepping-up pipe size downstream of a control valve. Velocity is brought under control more efficiently for enhanced

Unretouched flow study photograph