Omega Products FMX7106-P User Manual

STATIC MIXERS

A Technical Introduction

FMX8125-P,
pkg of 10

FMX7109-AC,
pkg of 10

All shown
smaller
than actual
size.

FMX7221-CP

FMX9611

FMX7251

FMX8263
pkg of 10

FMX8481S

FMX9603,

interior detail.

Selection Guide

For each application, the designer
must first determine the number of
mixing sections required to achieve
a complete mix. The guidelines
below are based upon the Reynolds
Number of your system. Also
included are tables with some
general application guidelines.
Next, the designer should select a
diameter and/or a construction that
will give the desired mixing
performance without exceeding your
system’s maximum allowable
pressure drop (see item 3 below).

1. Calculate the Reynolds
Number. Use the diameter given
in the charts. If both inside and
outside diameters are supplied,
use the inside diameter

3157 x Q x S

RE =

2. Select a model based on the

FMX7000 Series Mixers:
No. of

800 to1000 14
>1000 7

D x MU

Reynolds Number.

Reynolds No. Elements

Typical No. of
Application Elements

Ozone Absorption 7
pH Control 7
Gas/Gas Blending 7
Dilution of Chemicals 7
Polyelectrolyte Dilution 14

FMX8000 Mixers:
No. of

Reynolds No. Elements

<10 24 to 32

10 to 500 16 to 24
500 to 2000 8 to 16
>2000 4 to 8

Typical No. of
Application Elements

1-1 Epoxies 24

Urethanes/Elastomers 32
Urethane Foam 16
In-line Aeration 8
Admixing of Additives 8

3. Determine the Pressure Drop

Laminar Flow:

Reynolds Number < 500
DP = Q x MU x L
Turbulent Flow:

Reynolds Number > 500
DP = Q2 x S x T

Note: If the pressure drop across the
mixer exceeds its maximum rating, a
modular mixer is required. For example,
if a 24-element FMX8300 mixer is required
and the pressure drop exceeds the 250 psi
rating, we recommend coupling two
12-element mixers in series.

Symbols

RE = Reynolds Number
Dimensionless

Q = Flow rate in Gallons/Minute
S = Specific Gravity—

Dimensionless
MU = Viscosity in Centipoise
D = Diameter in Inches
DP = Pressure Drop in psi
L = Laminar Factor—

See Mixer Tables
T = Turbulent Factor —

See Mixer Tables

L-X

MIXING ELEMENTS

FMX7100/

8100 Series

The FMX7100 and FMX8100
series mixing elements are injection
molded in one operation to ensure
low cost with excellent quality.
The FMX7100 series are
specifically designed for low
viscosity applications. The
FMX8100 plastic spiral elements
were developed for adhesive and
sealant and other high viscosity
mixing applications. The leading
and trailing edges of the FMX8000
mixers are “knife edged” so that
the unit flushes clean with less
solvent—no flat leading edges to
accumulate material.

FMX7109-AC, low viscosity
mixing elements,
package of 10.

Both shown larger than actual size.

Polyacetal is completely inert to
most common solvents, such as
MEK acetone, and methylene
chloride for use in the Adhesive
and Insulation industries. Its
maximum service temperature is
250°F. Polyacetal is not
recommended for service with
bases or acids. Polypropylene has

FMX8125-P, high viscosity
mixing element, sold
in package of 10.

excellent chemical resistance and
a maximum service temperature
to 200°F. Metal or plastic tubing may
be used to house the mixing sections.
However, to achieve maximum
performance, the sections must fit
snugly inside the tube. Accepted
tolerance is no more than 2% greater
than the mixer diameter.

To Order Visit omega.com/fmx for Pricing and Details

Factors
Model No. Package of 10

Low Viscosity Mixing Elements
FMX7103-AC 0.300 7 1.4 0.18 8.74 Polyacetal
FMX7106-P 0.687 7 4.2 0.015 0.276 Polypropylene
FMX7109-AC 0.903 7 5.3 0.0066 0.092 Polyacetal
FMX7109-P 0.906 7 5.3 0.0066 0.092 Polypropylene
FMX7120-AC 2.040 5 9.0 0.0003 0.0018 Polyacetal
FMX7120-P 2.050 5 9.0 0.0003 0.0018 Polypropylene
High Viscosity Mixing Elements
FMX8112-AC 0.125 12 1.3 1.29 328.7 Polyacetal
FMX8112-P 0.125 12 1.3 1.29 328.7 Polypropylene
FMX8118-AC 0.187 16 2.5 0.5152 104.7 Polyacetal
FMX8118-P 0.187 16 2.5 0.5152 104.7 Polypropylene
FMX8124-AC 0.250 16 4.0 0.216 35.7 Polyacetal
FMX8125-P 0.251 16 4.0 0.216 35.7 Polypropylene
FMX8137-AC 0.370 12 3.9 0.048 4.27 Polyacetal
FMX8137-P 0.373 12 3.9 0.048 4.27 Polypropylene
FMX8149-AC 0.498 12 5.1 0.0192 1.23 Polyacetal
FMX8150-P 0.500 12 5.1 0.0192 1.23 Polypropylene

Ordering Examples: FMX7109-AC, polyacetal low viscosity mixing elements, package of 10.
FMX8125-P, polypropylene high viscosity mixing elements, package of 10.

Diameter (inch)

Elements

Length (inch)

L-X

L T

Material

L