Fox Thermal Instruments FC10 Specifications

Model FC10 Flow Conditioner

Precision Mass Flow Measurement

An ON

I

CON Brand

Irregular flow
profiles

Proper flow profile

FLOW

for Gas Applications

• Reduces the need for long straight pipe
runs

• Precision, laser-cut design

• 316 stainless steel material

• Creates proper gas flow profile from
irregular flow profiles

• Negligible pressure drop

• Use with insertion style flow meters

• Available in 10 sizes for schedule 40
pipes: 1.5”, 2”, 2.5”, 3”, 4”, 5”, 6”, 8”, 10”,
and 12”

• Install upstream from the flow meter
probe between 150 lb. flanges

• Easy installation in the center of the
pipe via flange matching pipe outer
diameter (OD)

FC10

Flow Conditioner
for use with Insertion
Style Flow Meters

Flow conditioners installed upstream
of ow meters reduce the need for
long, straight pipe runs.

Installation Solutions for Limited Pipe Runs

Flow meter accuracy is often dependent on achieving a uniform flow
profile near the center of the pipe. Distortion and swirl are disturbances
in flow that can be remedied either by extending the length of space
between the cause of the disturbance and the sensing element
(increasing straight pipe runs) or by adding a flow conditioner to correct
the disturbance directly.

FOX THERMAL

399 RESERVATION ROAD
MARINA, CA 93933
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www.foxthermal.com

In certain circumstances, the extra space needed to accommodate flow
meters requiring more straight pipe runs upstream or downstream of
the flow meter’s flow sensor isn’t available. In these cases, it’s necessary
to find solutions to these space limitations.

Insertion thermal mass flow meters are easy to install and require
minimal straight pipe runs. In the past, the only option to reducing
straight pipe runs for very tight spaces was to order inline flow meters
with flow conditioners. In order to give customers more flexibility,
Fox Thermal has developed the FC10 flow conditioner for use with
insertion style flow meters.

Each flow meter is calibrated with the flow conditioner to ensure the
highest accuracy.

FC10 Rev. A

SPECIFICATIONS

Flow meter

(customer supplied)

Sizing

The FC10 was designed to be used in a variety of pipe
sizes. FC10s are available in 10 sizes for schedule 40 pipes:

1.5”, 2”, 2.5”, 3”, 4”, 5”, 6”, 8”, 10”, and 12”. For pipe sizes

outside of this range, an inline ow meter is recommended.

NOTE: For pressure drop data, please visit the Fox website.

Figure 1.1: Straight Pipe Run Requirements

FC10 Flow Conditioner

installed between two flanges

Irregular Flow
Profile

FLOW

Table 1.1: Straight Pipe Run Requirements

Proper
Flow
Profile

“X”

F1

F2 F3 F4

Lateral Placement

To determine where to install the FC10 flow conditioner,
the pipe size is important. FC10s require 5D upstream.
The flow meter’s sensor should also have 5D before any
downstream disturbances. The distance between the FC10
flow conditioner and the flow meter’s sensor is dependent
on the pipe size and is listed in Table 1.1 and illustrated in

Figure 1.1 below.

TECH TIP

Branch Outlet
(installed by customer)

5D5D

Compare Upstream &

Downstream Straight

Run Requirements for

Common Flow Meter

Technologies

DP METERS

20 Upstream

10 Downstream

Schedule 40

Pipe Size

“X”

Inch (mm)

Min. Up/Downstream

Pipe Diameters Inch (mm)

1.5 6 (152) 5D 8 (203)
2 6 (152) 5D 10 (254)

2.5 9 (229) 5D 15 (381)
3 9 (229) 5D 15 (381)
4 9 (229) 5D 20 (508)
5 10 (254) 5D 25 (635)
6 12 (305) 5D 30 (762)
8 16 (406) 5D 40 (1016)

10 20 (508) 5D 50 (1270)
12 24 (610) 5D 60 (1524)

INSTALLATION

FC10 Orientation

Every FC10 has “UPSTREAM” etched into the
orientation marker at the top of the flow conditioner.
This marker should be pointing parallel to the probe
with the “UPSTREAM” etching pointing toward the
upstream portion of the pipe.
The FC10 is installed between two 150lb flanges and
gaskets (supplied by customer) should be placed on
both sides of the flow conditioner to ensure a tight

seal.
Please refer to document #107679 for further
installation instructions.

VORTEX METERS

35 Upstream

5 Downstream

TURBINE METERS

20 Upstream

5 Downstream

ULTRASONIC

METERS

10 - 20 Upstream

10 - 20 Downstream

Figure 1.2: Orientation of FC10 Flow Conditioner

Orientation marker

FLO

FC10 Orientation marker
with “UPSTREAM” etching

(supplied by customer)

Gaskets

must be parallel to
flow meter probe

(see table previous page)

F1

F2 F3 F4

Probe
Branch Outlet

“X”