direction is the forward movement of a material or fluid (such as
air or water) through the components of a system. You can set or
reverse the flow direction of a duct run or a pipe run between 2
branches. Once you set the flow direction, you can show it using
flow markers, toggling the markers on and off as needed. The flow
markers are solid 2D arrows displayed at the midpoint of segments.
Flow markers indicating
the flow direction of a pipe run
In addition to flow
markers, you can also add flow labels (sometimes referred to as
flow arrows in the software) to duct runs and pipe runs. Like flow markers,
flow labels show the current flow direction of the run if the flow
direction has been set, and they are scaled according to the annotation
scale. Unlike flow markers, flow labels are fully annotative objects,
which means you can modify and delete them. For information on adding
flow labels as you draw, see Applying Label or Flow Arrow Styles to Ducts
or Adding Labels or Flow Arrows to Pipe
To set or reverse the flow direction
of a duct or pipe run
- Select a segment in the run.
- Click Duct tabCalculations
panelSet Flow Direction .
You can perform the same
operation on a pipe run using Set Flow Direction on the Pipe tab.
The current flow direction
of the run is shown by an arrow in the center of the selected segment.
If the run does not have an assigned flow direction, the start point
of the segment is considered upstream, and a default flow direction
- Do one of the following:
- Enter y (yes) to reverse
the flow direction.
- Enter n (no) to accept
the indicated flow direction.
The selected run between
branches is assigned the indicated flow direction. Flow direction
for a run stops at branch fittings (fittings with 3 or more connectors,
such as tees and crosses) and MvParts.
NoteTo reverse the flow
direction of a single segment, select it, right-click, and click
ReverseSegment (or enter reversesegment).
To turn flow markers on or off for all
runs that have a flow direction
- Select a segment in a run.
- Click Pipe tab or Duct
NoteIf you do not want
flow markers to appear on construction documents, turn them off
before plotting or publishing.