Instruction Manual
D103195X012
Inline and Vent Diffusers
December 2011
4
6013 and 6015 diffusers with shell are provided with mounting brackets for wind and side loads. These mounting
brackets also provide support, so the entire weight of the diffuser is not on the inlet connection. The end-user shall
provide the necessary support structure to interface with the provided mounting brackets on the diffuser.
Flanged Connections–For high temperature applications, grease the flange connection bolts with a high temperature
thread lubricant. Install flange gaskets and connection bolts per accepted practices and tighten securely.
Re-tighten bolts after the diffuser has been pressurized. Do not expose the diffuser to undue stresses by installing it in
bent pipes or bent flanges.
Welded Connections–Welding procedures should be in accordance with the applicable codes and the base materials.
For preheat, welding electrodes, and post-weld heat treatment, refer to the standard applicable codes and practices.
Materials are specified on the diffuser specification sheet that is delivered together with the diffuser.
Maintenance
Servicing
The diffuser has no serviceable parts. However, during routine maintenance intervals it is important to inspect the
diffuser for damaged or cracked welds (exclusive of the Whisper Disk diffuser). Your local Emerson Process
Management Instrument and Valve Services office can help determine the correct course of action if damage is
present. The diffuser is normally welded or bolted in line and not removed unless it requires cleaning or replacement
due to damage or wear.
In the event the diffuser is not performing as expected, a bore scope can be used to examine the flow passages for
blockages without the need for disassembly and removal. If blockages are present, cleaning can be performed by
removing the unit by either cutting of the welds or removal of bolting and using a pressurized water stream to clear
any blockages. If blockages are still present after cleaning, the unit will need to be replaced.
Troubleshooting
Table 2 is intended as a basic first line troubleshooting guide. Contact your Emerson Process Management sales office
for assistance if you are unable to resolve your field operation problem.
Table 2. Troubleshooting Guide
Problem
Possible Solution
Anticipated backpressure is not reached.
Review valve conditions and opening percentage
Check for process flow changes and/or Inspect unit.
Inspect flow passages in diffuser for blockage, clean if necessary
System noise and vibration have suddenly increased above previous levels.
Review operating history to check for process flow changes. Inspect unit.
