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
ALL-PLASTIC STATIC MIXER ASSEMBLIES
FMX7200 Series
Sizes:
Sizes:
3
3
⁄4 to 2"
⁄8 to 2"
diameter
diameter
FMX7200 Series
The FMX7200 Series is an effective
answer to your mixing requirements.
Operating in-line, with no moving
parts, these mixers blend and
disperse treatment chemicals into
waste water streams. Compared to
competitive mixers, its unique
baffling design ensures complete
mixing in a shorter length and lower
pressure drop.
The FMX7200 Series is easily
installed in new or existing process
lines. They are available in pipe sizes
from ³⁄₄ to 2" diameter. Construction
materials include PVC, and CPVC.
FMX7200 Series mixers are specially
designed for waste water treatment,
mixing additives, pH control, and
polyelectrolyte dilution. These
all-plastic mixers combine PVC
or CPVC pipe with polypropylene
internals. Certain sizes feature
clipped sections, which eliminate
sharp crevices where material can
accumulate and plug up the mixer.
Polypropylene has excellent chemical
resistance to most acids and bases.
The maximum service temperature
of a standard FMX7200 Series mixer
is 60°C (140°F) with PVC housing,
82°C (180°F) with CPVC housing.
SPECIFICATIONS
Section: Polypropylene non-removable
Housing: PVC or CPVC;
schedule 80 up to and including
1"; schedule 40 for 2"
OMEGA® FMX7200 Series mixers are designed for efficient
turbulent-flow mixing at low pressure drop. Ideal for admixing water/
wastewater treatment chemicals, polymer dilution, and other
low-viscosity applications. Mixing elements consist of a series of
polypropylene baffles, and are mounted in a PVC housing with
FNPT ends. CPVC and clear PVC housings available.
FMX7221-CP (above) and FMX7251 (left)
NPT threaded model, shown smaller
than actual size.
Pressure Limitations
Pipe Size psig @ 24°C (75°F)
³⁄₄" 690
1" 630
2" 200
To Order Visit omega.com/fmx for Pricing and Details
Model No. (PVC) Model No. (CPVC) Dia. (inch) Elements Ends FNPT (inch) Length mm (inch) L T
— FMX7221-CP 0.687 7 clipped
FMX7222 — 0.687 14 clipped
FMX7232 — 0.906 14 clipped 1 320 (12.6) 0.013 0.16
FMX7251 FMX7251-CP 2.05 5 2 287 (11.3) 0.0003 0.0016
Comes complete with PVC housing and PVC 150# Van Stone SlipON flanged ends, internal mixing elements are CPVC material.
Ordering Examples: FMX7221-CP,
FMX7251, 2 FNPT, 5 clipped elements.
3
FNPT, 7 clipped elements.
⁄
4
Factors
No. of
³⁄₄
178 (7.0) 0.015 0.24
³⁄₄
267 (10.5) 0.03 0.48
L-X
ALL STAINLESS STEEL STATIC MIXERS
With Optional PFA-Coated Elements
FMX8400 Series
Sizes:
Sizes:
1
1
⁄8 to 2"
⁄8 to 2"
diameter
diameter
FMX8400 Series
FMX8400 Series pipe mixers feature
304 SS piping (schedule 40 nominal)
with 316 SS elements. For routine
maintenance, the elements can be
pushed out and cleaned.
The leading and trailing edges of the
mixers are “knife edged” to
flush clean with less solvent,
having no flat leading edges to
accumulate material.
The FMX8400 Series consists of
effective motionless mixers. When
combined with metering pumps, these
mixers replace expensive treatment
tanks and dynamic mixers. Consider
these advantages: zero maintenance,
low cost, easy installation, and low
energy consumption.
Typical applications include laminar or
turbulent blending, liquid/gas contacting,
and enhanced heat transfer. The mixing
process is modular: the more difficult the
application, the greater the number of
elements required.
FMX8400 Pressure Limitations
Pipe Size (in) psig @ 24°C (300°F)
¹⁄₈ 8750
¹⁄₄ 8500
³⁄₈ 7250
¹⁄₂ 7250
³⁄₄ 6000
1 4500
1¹⁄₂ 3000
2 2500
OMEGA FMX8400 Series mixers offer efficient mixing of low
or high viscosity fluids at low pressure drop. Also ideal for
two-phase (gas-liquid) mixing and blending of gases. Elements
consist of a series of left and right helixes fabricated from 316 SS.
304 SS housing is corrosion-resistant, designed for high pressure
and high temperature service. MNPT ends ensure easy installation.
FMX8481S (NPT threaded model),
shown actual size.
316 SS Elements
To Order
ID No. of Ends Length Factors
Model No. (inch) Elements MNPT (inch) L T
FMX8442S 0.28 12
FMX8451S 0.37 6
FMX8452S 0.37 12
FMX8462S 0.51 12
FMX8481S 0.64 6
FMX8482S 0.64 12
FMX8412S 0.80 12
FMX8413S 1.06 6 1 9.5 0.001 0.024
FMX8414S 1.06 12 1 18.5 0.002 0.048
FMX8415S 1.61 6 1
FMX8421S 2.07 6 2 17.5 0.0001 0.0013
Ordering Example: FMX8481S, 316 SS element mixer.
Visit omega.com/fmx for Pricing and Details
¹⁄₈
5.4 0.1176 12.2
¹⁄₄
3.7 0.0237 1.9
¹⁄₄
7.0 0.0474 3.8
³⁄₈
9.5 0.0184 1.1
¹⁄₂
5.7 0.0049 0.22
¹⁄₂
11.0 0.0098 0.44
³⁄₄
14.7 0.0046 0.08
¹⁄₂
14.0 0.0002 0.004
L-X
L
STAINLESS TUBE AND SPIRAL
SANITARY MIXERS
FMX9600 Series
The FMX9600 Series spiral mixers
are designed for high-pressure
applications such as two component
adhesives and sealants. The mixers
consist of a series of left and right
hand spiral elements which have
been “edge-sealed” into a tube.
The spiral tube mixer is available
in four diameters and with 21 to 32
elements. The elements have been
nicrobrazed along their complete
length and cannot be removed from
the tube. Consider the advantages
of this all-stainless steel assembly:
the moderate price offers significant
savings over competitive mixers,
the contour of the elements ensures
that the mixer flushes clean with
less solvent, and the tube mixers
are manufactured with heavy walled
tubing, which resists warpage
during furnace cleaning and
increases the life of the mixer.
Inset to show
detail.
FMX9604, shown
actual size.
FMX9611,
shown actual size.
SPECIFICATIONS
Elements: 316 stainless steel,
non-removable
Housing: 304 stainless steel
with plain ends
To Order Visit omega.com/fmx for Pricing and Details
Element Housing
Diameter Mixing Length Outside Dia. Pressure Limitation L Factor to Calc.
Model No. mm (inch) Elements cm (inch) mm (inch) psi@300°F bar@150°C Pressure Drop
FMX9603 2.87 (0.113) 27 19.05 (7.50) 4.75 (0.187) 6900 476 3.180
FMX9604 4.75 (0.187) 21 17.78 (7.00) 6.35 (0.250) 4200 290 0.540
FMX9605 4.75 (0.187) 27 23.50 (9.25) 6.35 (0.250) 4200 290 0.700
FMX9608 7.42 (0.292) 27 35.56 (14.00) 9.53 (0.375) 3600 248 0.110
FMX9611 10.62 (0.418) 32 62.87 (24.75) 12.70 (0.500) 2800 193 0.077
Supplied with plain ends, the elements are edge sealed to the housing to handle the mixing of high pressure or highly viscous materials.
Elements are 316 SS and the housing is 304 SS.
Ordering Examples: FMX9604, spiral mixer, 4.75 mm (0.187").
FMX9611, spiral mixer, 10.62 mm (0.418") diameter.
L-X
POLYACETAL STATIC
MIXER ASSEMBLIES
FMX8200 Series
The Series FMX8200 disposable
spiral mixers are idea for adhesives
or other high viscosity applications.
The leading and trailing edges of
the mixers are “knifed edged” to
flush clean with less solvent–no
flat leading edges to accumulate
material.
FMX8263, sold in
package of 10
FMX8234, sold in
package of 10
SPECIFICATIONS
Max Pressure Drop: 250 psi
Element: Polyacetal
Housing: Nylon plain ends
Pressure limitaion
OD PSIG @ 75ºF
0.187 580
0.250 430
0.375 600
0.500 460
0.625 350
FMX8213, sold in
package of 10
All models shown
smaller than actual size.
To Order Visit omega.com/fmx for Pricing and Details
Model No.
Polyacetal Package of 10
FMX8213 0.125 24 2.8 0.187 2.58 657.4 Polyacetal
FMX8214 0.125 30 3.5 0.187 3.23 821.7
FMX8223 0.187 24 4.1 0.250 0.7728 157.1 Polyacetal
FMX8224 0.187 32 5.4 0.250 0.9660 209.4
FMX8233 0.250 24 6.5 0.375 0.3240 53.6 Polyacetal
FMX8234 0.250 32 8.5 0.375 0.4320 71.4
FMX8251 0.370 12 7.5 0.500 0.0480 4.27 Polyacetal
FMX8253 0.370 24 11.5 0.500 0.0960 8.54
FMX8254 0.370 30 13.5 0.500 0.1200 10.7
FMX8262 0.498 18 11.1 0.625 0.0288 1.85
FMX8263 0.498 24 13.5 0.625 0.0384 2.46 Polyacetal
Ordering Examples: FMX8213, plain ends, 24 elements, package of 10.
FMX8234, plain ends, 32 elements, package of 10.
Diameter (inch)
Elements
Length (inch) O.D.
L-X
L T Material
Factors
L
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