Sage SIE Series, Operation And Instruction Manual

Page: 12 / 75

S A G E M E T E R I N G , I N C .
O p e r a t i o n s a n d I n s t r u c t i o n M a n u a l
12
REV. 03-SIE/SRE
FLOW CONDITIONING
Although a minimum of 15 pipe diameters of
upstream straight run is commonly recommended,
to absolutely assure that the flow profile is well
developed at the point of measurement, either use
Flow Conditioners (standard in Sage In-Line Flow
Meters, 1/2" and larger, and also available as assem-
blies for Insertion Flow Meters, see page 14), or
consider additional straight run. The Chart below
provides examples of the amount of straight run
that would virtually assure that there are no flow
disturbances at the point of measurement.
and is plumbed directly in the flow line by thread-
ing, flanging, welding, etc. DO NOT USE REDUCERS.
It includes the sensing element (a self-heated flow
sensor and a temperature/reference sensor) mounted
directly in the specified flow section for exposure to
the process gas; a sensor drive circuit; microprocessor
meter board, and transmitter enclosure.
All in-line Flow Meters, 1/2" and up have built-in
Flow Conditioners. See Table on page 12 for
Upstream Straight run requirements. Note, the 1/4"
and 3/8" do not have Flow Conditioners and thus
require more straight run.
IMPORTANCE OF FLOW CONDITIONING
Recommended Pipe Diameters Upstream
One 90˚ Elbow
Two 90˚ Elbows
in the same plane
Two 90˚ Elbows
in different planes
4:1 Area Reduction
4:1 Area Expansion
Multiple Disturbance
3
5
9
3
10
TBD
1
This column applies to In-Line Flow Meters, which come standard with built-in Flow Conditioners, as well as Insertion Meters,
when provided with upstream Captive Flow Conditioners (see page 13).
D I S T U R B A N C E
15
20
At least 40
15
At least 30
To Be Determined
WITHOUT
FLOW CONDITIONING
Minimum Industry
Recommendation
WITH FLOW
CONDITIONING
1
Sage
Recommendation