-––
[
HOW TO SPECIFY A
SPECIAL
NOTE
The following
STEP
Maximum Continuous
instructions will help
2
System Operating
determine the correct Temperature (MCSOT°F)
part number.
STEP
Expansion joints can be manufactured and - This is the highest
Completion of the
1
shipped either assembly or unassembled select temperature at which the system
ducting expansion joint
the option which best meets your requirements. normally operates. Excursion (upset)
specification sheet is
A - Assembled – Ready for immediate installation
temperatures and durations should
also helpful and enables be specified on the Ducting
Senior Flexonics
U – Unassembled – Match marked and packaged to
Expansion Joint Specification Sheet.
Pathway’s engineering
minimize assembly at the jobsite. Complete assembly
For applications exceeding 1200°F,
staff to verify that the
instructions and manufacturing drawings included.
please consult Senior Flexonics
correct design has been
BA - Belt, Assembled - Fabric belt elements are provided
Pathway’s engineering department.
selected. Factory holes,
as a factory-spliced, endless loop, to fit existing frames.
back-up bars, nuts, and
BU - Belt, Unassembled - Fabric elements are prepared
bolts must be specified
for field splicing at the jobsite.
if required.
Assembly MCSOT
Operating Frame
Pressure Style
English U 450 12 SR2400
Metric U 232 305 SR2400
STEP
Gas Seal Material - Leave this section
5
of the part number blank and Senior
Flexonics Pathway will make the
material selection.
STEP
Select the letter code for the options and
6
See material descriptions on Pages 17-20
accessories (CAP for Cavity Accumulation Pillow,
CIP for Cavity Insulation Pillow, BH for Braided
Hose Seal, TG for Tadpole Gasket Tape, FD for
]–-–
LOY ated
-––[FLEXO
N PRO
DUCT L
INE
]–-– ULTRACHEM Fluoroplastic co
D PTFE
/FKM A
L
fiberglass fabric w
ith 4 mil PTFE Flow Deflector, FWL for Field welded Liner, SWL for Shop
film laminated to g
as side
ay manufactures a
variety of compo
site belt configura
tions to meet the
tio-––n p[PurpAoseTEs is o
nNe of thTEe premiu
m grade
ITIONA
L FLE
XIBILITY
Senior Flexonics P
athw
temperatuPreRs. DARL
YN 1100
CB & U
LTRACH
EM
us operating OV
IDES A
DD
varied needs of a
ll our customers. S
hown for illustra
CB or Chemic
al Barrier was
developed fo
r superior cor
rosion resista
nce. A multil
ayer PTFE cas
t
s for each rated c
ontinuo
Perfluoroplastic, d
ue to its crystallin
e nature, is
and chemica
lly welded to
DARLYN 110
0 and ULTRA
CHEM assurin
g an even
s. 5/8” (1
6 mm) thick
belt construction film is ther
mally nonwoven fiberglass
inherently stiff w
hich reduces the lo
ng term flex
greater protec
tion from cor
rosion due to
exposure in t
he most extre
me condition
s. This
mer insulatio
n laminated
4 mil cast PTFE endurance and life o
f PTFE fabric expan
sion joint
to the gas seal
corrosion resistant film isotrooprtcominic film
(gid, fluentoroeical plashto
ysical propert
ies in all dire
ctions) is bui
lt up through
multiple
To overcome this sh Welded Liner, BFL for Bolted Flange Liner)operations assuring a u
niform thickn
ess, nonporo
us, chemically
inert barrier. F
urther, when
(Viton®/Fluorel
®) is blended into a p
atented alloy
combined wi
th the DARLY
N and ULTRA
CHEM isotro
pic fabric, the
result is a un
iform membr
ane
e beltwhich bathes the coated fib
erglass matrix s
ignificantly
which can fle
x without str
ess concentra
tions, distribu
ting the load
equally thro
ughout the b
elt.
ced increasing the flex
ibility, tear resista
nce, tensile and
shear
FLEXON-120
0 A compos
it
Multilayer reinforent
continuous filam strength of D
ARLYN fabricate
d belts. This m
eans longer
designed to p
rovide contin
uous
fiberglass yarn (Fill) in-service life. HIGH TE
MPERAT
URE AP
PLICATIO
NS
service at 120
0°F (649°C), b
y the
■ Superior streng
th retention, e
ven after repe
ated flexing.
addition of a
1/2” (13 mm
) of ceramic
ced■ Fast, easy field splicing
mat insulatio
n to the FLEX
ON 1000.
1/2” (13 mm) Inconel wire reinfor
ceramic mat bric
ck of stiffness. ■ Outsta
nding corrosio
n resistance
Inconel
® wire inserted silic
a cloth is
insulation silica
/ceramic fa
encasement■ Less than 1/4 the weight o
f 100% fluoro
elastomer fab
rics, resulting
in lower inst
alled costs
used as the e
ncasement to
replace
Wrapped to DARLYN can be easily id
entified by its la
maximize fiberglass
in applicatio
ns above
°C).flexibility and The uniformly distrib
uted alloy coatin
g is more
1000°F (538tensile strength
compliant than
PTFE, filling the
voids and impre
gnating
M fluoroplasticULTRACHE FLEXON-700 A
composite b
elt designed
the woven stru
cture. This plia
ble matrix maintain
s
coated fiberglass fa
bric
to provide co
ntinuous reli
able service a
t
OW]–-– ]–-–
700°F (371°C
). A tightly w
oven fibergla
ss
isted consisten
t physical and c
hemical proper
ties over a wide
Bundled and tw insulation is ther
mally bonded
to the
oplastic coatedfor flexibility range of temperatu
res and corrosiv
e conditions
experienced in flu
e gas ductwork. FLEXON material. This c
omposite des
ign
ULTRACHEM Fluor 4 mil PTFE
fiberglass fabric w
ith e
Woven to provide to gas sidatrix provides insulating pr
operties at ele
vated
film laminated paration
of See pages
-––[CAVITY PILL ACCESS
ORIES
tardiOng thPeOW STYLES
-–– TIO
NS &
CAVITY PILL [onics Pathway cavity pillows serve
three purposes, re
The Senior Flexextended life m
intrusion of particula
te, thermal protection
, and resistance to pr
essure pulsation.
BRAIDED H
OSE SEAL
(BH) n is oftenic insulatio
d hose with enclosed ceram e
temperatures
and prevents
se
are fabricated from se
lected insulation mat
erials and wrapped w
ith a
Our pillows Flexible
stainless steel braid
e particulate loading. The hose is
reas of high
r expansion joints in a t particulate fro
m entering th works
e detailed the in
sulation. high temperature fabric, designed fo
r the operating condi
tions. Standard pillow
s are
specified fo w liners to preven
CONSIST
ENT COA
TING PRO
CESS
FLEXON-150
0 A compos
ite belt
provided with “ears”
or tabs that fasten un
der the belt and back
up bars to hold the
secured between the flo y alon
g with a cavity pillo
w
pillow in place. The e
ars are designed to pr
ovide a memory to th
e
. This accessor
The DARLYN ser
ies of products
are coated and
cured over a d
ozen times in th
e patented pro
cess.
oroplastic coatedULTRACHEM Flu 4 mil (0.1 mm) designed to provide co
ntinuous
FLUORINAT
ED ELASTO
PLASTICS
The multilayer
alloy coating o
f PTFE and FKM
completely su
rrounds the fibe
rglass foundatio
n,
4 mil PTFE film fiberglass fabric with
laminated to service
at elevated c
ontinuous .
Fluoroelastoplastic
s combine the co
rrosion resistance
of a fluoroplastic w
ith the flexibility

ltiple filament cover PTFE film la
minated to gas sid
e
and then is mu
lti-coated with
PTFE. This un
ique procedure
is a characteristic
of th
60 oz (0.64 g/cm
3) ULTRACHEM temperatures to 1500°F (8
16°C)
of a fluoroelastom
er through the ad
dition of FKM to th
e PTFE compoun
d. Fluoroelastoplastic
11-12
expansion joint cavitypillow such that it will return to an
“as installed” uncom
pressed
ts.
well in cement planstate after plant cool down, during
outages.
ithuct systems w
sion joints in d
quality and cons
istency which g
uarantees the lo
ngevity of the D
ARLYN products.
CAVITY ACCUMUL
ATION PILLO
W (CAP)
TADPOLE G
ASKET TAP
E (TG)
ge-type expan t
00% defect free, c
ontinuous, twiste
d mu
tightly woven fibe
rglass
When using integra
l flan nditions, Senior Flexonics Pathway
materials have bee
n used successfully
in over 10,000 ex
pansion joints wo
rldwide, providin
g
mat insulation lam
inated A cavity created between the structur
al steel frame/flanges
and the
al plies areanufactured with 1 positive pressure operating codpole gasketing between
the flexible elemen
to the gas se gas seal (fabric expan
sion joint) is designe
d to provide a stando
ff
exceptional perfo
rmance even in th
e severe chemical en
vironments foun
d in flue gas
aterial is mDARLYN m s fibers possible. Numerous 1” (25 mm) thick recommends the use of ta
ceramic mat insula
tion
Style - 1 between th
e fabric element and
the flue gas. This cav
ity can fill
desulfurization p
lants (FGD), pulp
and paper (recov
ery boilers), refuse
derived fuels (RD
F)
fiberglass. This m
eans that for th
e entire length
of your DARLYN
belting material th
e strands are
teed the stronges
t fiberglas
s and guaran with par
ticulate falling out of
the flue gas. If these
deposits are
flange and backup
bars (as illustrated). T
his prevents the h
eads of the
ible element.
the outside cover of the flexed belts during large
and smelters. uncut, homogeneou
than grouped a
nd twisted togeth
er maximizing th
e flex, tensile, s
hear and tear c
haracteristics o
f
hick5/8” (16 mm) t ced
FLEXON-100
0 A compos
ite belt
DARLYN
® PRODUCT LIN
E
thousands of filam
ents. These gla
ss yarns are then
bathed with a p
rotectant PTFE
coating to
nonwoven fibergla
ss
Inconel wire reinfo
r
for various
allowed to buildup th
e expansion joint wil
l fail to operate prope
rly
erection bolts from
abrading d integrally flang
ow designed to occup
y
and could become da
maged. Senior Flexo
nics Pathway
This option also protects both flat an
recommends the use
of an accumulation p
ill
lateral or compression
movements. FD
l woven glass. this “d
ead space”, preventin
g the deposits from e
ntering and filling
TP
designed to p
rovide contin
uous reliable
on-woven insulation laminated silica/ceramic fabricnt encasement this cavity. The cavity pillow in co
njunction with a flow
liner will
Senior Flexonics P
athway is an auth
orized fabricator o
f expansion joints u
tilizing Chemfab
resist self-abrasio
n and friction d
uring flexing, a
nd chemical attac
k preventing ac
id from wickin
g
to the gas seal reinforceme
service at 100
0°F (538°C). A
n
prevent the accumula
tion of particulate/fly
ash. Many
Corporation’s DA
RLYN fabrics. Th
ese products were first in
troduced in 1983
. The DARLYN
in service, which d
estroys convent
iona
Style - 2
fiberglass nee
dle-mat insul
ation is bond
ed
5/8” (16 mm) thic
k maintenance managers view this option
as a low cost insuran
ce
line of materials a
re fluorinatedelasto
plastic alloys. Be
cause of their therm
al and chemical
HEM materia
l and encased
nonwoven fibergla
ss
ed
to the ULTRA
C glass cloth. insulation laminat
capabilities, fluoro
elastoplastic fiberg
lass reinforced, PT
FE-coated and lam
inated belting ma
terials
ized coated fib
er al
in alumin to the
gas se
18are being used extensively in ex
pansion joint desig
ns for all types of sy
stems.
pillow styles.
policy that extends th
e service life of the ex
pansion joint.
Typical cavity pillow
FLOW DEFL
ECTOR (FD
) isture and
ns, an angle flow d
eflector is added to th
e design to
construction consisting ansionw deflector is used to preven
t mo
in the exp)In some expansion joint installatio d being trapped
HIGH TEMPE
RATURE CAVITY OWS (CIP
e service life oof layers of inf the joint. A flo
sulationuct walls an
increase thINSULATION PILL encased in a protective20
particulate from slidin
g down vertical d
high temp sleeve.Cavity Insulation Pillow (CIP) - A
style CIP provides ad
ditional
ion to the belting ma
terial for high tempe
rature
joint cavity by the flow
liner.
thermal protect17
applications.090°C). Style - 3
Note: Designs are availa
ble to 2000°F (1
]–-– lt
19
]–-– -––
-––
[FRAM
E STYL
ES
ns. The integrally flan
ged U-be
st and
[FLOW LINERS as a low
er replacement belt co
rous frame designs for vario
us applicatio
al shields designed to
provide protection fo
r the fabric element a
nd/or
athway provides num
e dard arrangements.
Integral Liner
Flow liners (baffles) a
re met of particulate or particulate acc
umulation. A liner is
also
Senior Flexonics P ple of several stan
ce thdeesign tem hperasa a verture ofy e
thcoenomical initial capital cos
t. The flat belt fram
e design h
cavity pillow from di
rect impingement
used to reduce flutter
of the fabric elemen
t caused by turbulence
, to help control the
existing hardware c
an be reused. The follo
wing is a sam
ions.
SR2400accumulation of dust or ash in the exp
ansion joint cavity, a
nd to redu
Design applications w
here the ductwork
flanges are presen
t and a complete fram
e
licat
well for high temperature apphis style works
flexible element. Flo
w liners can be suppl
ied on a variety of pr
ofiles (straight, airfoil
, semi-airfoil
assembly is preferre
d. T
or telescoping) and m
aterials. (Standard pr
ofile and material are
straight 10 GA. A569
C.S.). Flow
■ Complete drop-in asse
mbly uce cost
rd frames redliners fall into the following categories
.
Bolt-in Liner■ Prefabricated standa
■ Integral liners are pre-m
anufactured parts of
the expansion joint f
rame as on SR2700 an
d
■ Belting hardware ac
cessible from outside
SR2750 series frames. flanged style e
xpansion joints as on
our U1000
■ Best choice when ad
jacent structures o
r equipment cannot
permit liner
protrusion beyond
attachment flange
.
■ Bolt-in liners are prima
rily used on integrall
y
SR2400 ■
series, between the b
elt or expansion join
t flange and the mati
ng duct flange. Gask
ets are
Accepts shop weld
ed flow liner
■required on metal-to-metal and/o
r Teflon-to-metal con
nections.
Readily accepts ea
red pillow design
sion joint frame. Weld-in Linerrs spanning the breach opening can b
e either welded in th
e field to the duct
■ Used to fill large breec
h openingsovements
s large lateral m ion■ Weld-in line ed in factory to the expan ■ Accommodate
interior or can be sup
plied weld
■ Provides proper setback
for belt protect
12
bled.bled or unassem
ts are furnished assem
11 ay expansion joinSenior Flexonics Pathw
21
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