Instruction Manual
D103195X012
Inline and Vent Diffusers
December 2011
3
Principle of Operation
Inline and vent diffusers are custom designed to match a wide range of valve outlet and/or pipeline size. Furthermore
these diffusers are selected to match the application specific conditions including temperature, pressure, and flow
capacity. The flexibility of the diffuser types and placement provide a range of installation possibilities. The diffuser is
not required to be installed adjacent to the control valve.
The 6010 is an inline diffuser that fits between two different sizes of pipe to meet both downstream and upstream pipe
sizes with an integral outlet head. The 6011 is a pipe-style inline diffuser that extends into existing pipe using a wafer
flange connection. The Whisper Disk is a flat plate-style inline diffuser that is available with a raised-face flanged
connection. The 6012, 6013, 6014, and 6015 are vent diffusers that are designed to reduce noise during process
venting applications.
Piping Considerations
Upstream piping should be the same nominal diameter as the diffuser inlet connection and vice versa.
The drilled hole pattern of the Whisper Disk inline diffuser must be within the inside diameter of the mating flange
schedule.
Reducers or elbows are not recommended downstream unless they are at least four to five downstream pipe
diameters downstream of the diffuser outlet.
Installation
Before installation, all piping to the diffuser must be blown clean, so that no particles, such as welding beads, dirt or
other foreign matter, are left in the pipeline. Keep foreign matter away from the line openings while preparing the
diffuser for installation.
CAUTION
Cleanliness of the upstream piping is critical. Debris in the piping can damage the diffuser and severely restrict flow, causing
overpressure.
Inspect the inside of the diffuser and clean if necessary.
Arrange a lifting sling around the diffuser to safely place it into the mounting position.
Note
To avoid flow interaction and reduce noise in 6012, 6013, 6014, and 6015 vent diffuser applications, do not install diffusers in close
proximity to support structures and ensure that adjacent diffusers are installed at different heights.
