Instruction Manual
D103195X012
Inline and Vent Diffusers
December 2011
2
Table 1. Specifications (for Standard Designs)
Available Configurations
6010: Inline diffuser (with integral outlet head)
6011: Inline diffuser (pipe-style)
Whisper Disk: Inline diffuser (flat plate)
6012: Drilled-hole Vent diffuser
6013: Drilled-hole Vent diffuser (with outer shell)
6014: WhisperFlo disc style
6015: WhisperFlo disc style (with outer shell)
Sizes
6010: NPS 1 x 3 to NPS 26 x 48 (inlet x outlet)
6011: NPS 2 to NPS 30
Whisper Disk: NPS 2 to NPS 24
6012: NPS 2 to NPS 26
6013: NPS 2 to NPS 26 (outer shell NPS 4 to 36)
6014: Sizes are available to meet your application
(see bulletin 80.3:6014)
6015: With outer shell. Sizes are available to meet
your application (see bulletin 80.3:6014)
End Connections
6010: Any combination of flanged (raised-face,
ring-type joint, and flat-face) or welded end
(buttweld or socket weld)
6011: Wafer flanged
Whisper Disk: Raised-face or ring-type joint flanged
6012 and 6013: Raised-face flanged, ring-type joint
flanged, or buttweld end
6014 and 6015: Raised-face flanged, ring-type joint
flanged, or buttweld end
Note
Inline and vent diffusers are not hydrostatically tested.
Introduction
Scope of Manual
This instruction manual includes operation, installation, and maintenance information for the following diffusers:
D
6010, 6011, and Whisper Disk Inline Diffusers. See figure 1
D
6012 and 6013 drilled-hole vent diffusers. See figures 2 and 3
D
6014 and 6015 WhisperFlo disc style vent diffusers. See figures 4 and 5
Do not install, operate, or maintain these diffusers without being fully trained and qualified in valve, actuator, and
accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to
carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If you
have any questions about these instructions, contact your Emerson Process Management sales office before
proceeding.
Description
Inline and vent diffusers are installed to provide backpressure for control valves, which greatly reduces control valve
noise generated by steam, gas, or vapor flow applications. Inline diffusers are placed downstream of the valve and are
either placed in or between pipe. Vent diffusers are placed downstream of the valve and vent process to the
atmosphere. Fisher inline and vent diffusers are used in gas, vapor, and steam applications.
