FABRIC EXPANSION JOINT
]
–-–
STEP
List the system operating pressure in
STEP
Frame Style - Select the appropriate frame style
3
inches water column, the pressure will be
4
(SR2400, SR2500, SR2550, SR2600, SR2650,
assumed to be positive unless a negative SR2700, SR2750, SR2800, SR2900, U1000, etc.)
number is listed. The maximum rated
operating pressure: ±83” wc (3 PSIG) for teflon belt
For isometric view and detailed
±139” wc (5 PSIG) for elastomer. For higher
description see pages 12-14
pressures please consult Senior Flexonics Pathway’s
engineering department.
]–-–
-––[OPTIO
NS & A
CCESS
ORIES
field assembly over
existing
SR2800rame is well suited for installatio
n with
This style f for all temp
erature ratings.
, and is utilized SR28
00 uited for installation wit
h field assembly
over existing
BRAIDED HO
SE SEAL (BH
)
prefabricated ang
le iron
expansion joints This styln e frame
is well s
nts, and is utilize
d for all tempera
ture ratings.
Flexible stainless stee
l braided hose with en
closed ceramic insula
tion is often
■ Economic frame utilizin
g standard
isting metal expan
sio
ofit over ex expansion
joi
specified for expansio
n joints in areas of h
igh particulate loadin
g. The hose is
ame can be utili
zed
■ Either welded or bolted
frame can be utili
zed
be used to retr ■ Economic fra
me utilizing stan
dard prefabricate
d angle iron
secured between the fl
ow liners to prevent p
articulate from enterin
g the
■. This accessory along with a cavity
pillow works
■ Fabric wrap design ca
n
Either welded or
bolted fr
expansion joint cavity joints (possible
on-line installation) ■ Fabric wrap design can be us
ed to retrofit ove
r existing metal
expansion
well in cement plants. ■ Accepts eared pillow
design up
joints (possible o
n-line installatio
n)
SR2800 assembly
and fit-
■ Facilitates field ■n Accepts eared pi
llow design
SR2800■ Tack welded nuts are o
ptional
■ Facilitates field as
sembly and fit-u
p
TADPOLE GA
SKET TAPE (TG
)
ack for belt protectioides proper setb
■ Prov ■ Tack welded nut
s are optional
When using integral fla
nge-type expansion jo
ints in duct systems w
ith
■ Provides proper se
tback for belt pr
otection
positive pressure ope
rating conditions, Sen
ior Flexonics Pathway
recommends the use
of tadpole gasketing
between the flexible
element
ssembly is required
or preferred.
flange and backup ba
rs (as illustrated). Th
is prevents the heads
of the
SR2900erection bolts from abrading the outside c
over of the flexible ele
ment.
Best utilized where flan
ges are not present a
nd field a
SR2900
This option also prote
cts both flat and inte
grally flanged belts d
uring large
■ Fabric wrap design u
sed over existing m
etal expansion join
ts
Best utilized wh
ere flanges are n
ot present and f
ield assembly is r
equired or prefe
rred.
lateral or compressio
n movements. (poss
FDible o
n-line installation) ical design ■ Fabric wrap design used
over existing m
etal expansion jo
ints
TP ann
els for econom■ Provides additional stiffener reinfo
rcement to existin
g ductwork
tructural steel ch (possible
on-line installat
ion)
■ Utilizes standard s ■ Provides addition
al stiffener reinfo
rcement to exist
ing ductwork
■ Flanges act as duct stiffi
ners
■ Utilizes standard s
tructural steel ch
annels for econo
mical design
SR2900 ■ Flanges act as duct stiffin
ers
SR2900 temperatures
FLOW DEFLE
CTOR (FD)
low to moderate
In some expansion jo
int installations, an a
ngle flow deflector is
added to the design to
U1000
n is used for
increase the service life
of the joint. A flow d
eflector is used to pre
vent moisture and
The standard integrally
flanged U-belt desi
g
d fasteners costU1000
particulate from slidin
g down vertical duct
walls and being trapp
ed in the expansion
here duct flanges are pre
sent and particula
te loading is minim
al
etal frame anapplications w The standard integrally flang
ed U-belt design
is used for low t
o moderate tem
peratures
joint cavity by the flo
w liner.
■ Lowest initial cost d
ue to reduced m
applications wh
ere duct flanges
are present and
particulate loadi
ng is minimal
■■ Molded corners provided
for rectangular du
ctwork
Lowest initial co
st due to reduce
d metal frame an
d fasteners cost
■■ Accommodates flanged
ducting or equipm
ent and utilized freq
uently for
Molded corners
provided for rec
tangular ductwo
rk
]–-– fan ap
plications ■ Accommodates flan
ged ducting or e
quipment and u
tilized frequent
ly for
U1000 ■ Minimal shipping c
osts fan applications
-––[FRAM
E STYL
ES
■■ Minimal shipping
costs
pplications. The inte
grally flanged U-beltStandard 3” high flange d
esign
U1000
■ Standard 3” high
flange design
Senior Flexonics Path
way provides numero
us frame designs for v
arious a
lications with minim
al
design has a very eco
nomical initial capita
l cost. The flat belt fra
me design has a lowe
r replacement belt co
st and
SLEEVES in H.V.A.C. applica
tions with minim
al
existing hardware can
be reused. The follo
wing is a sample of se
veral standard arrang
ements.
Sleeves are primarily use
d for vibration in H
.V.A.C. app
SLEEVES
SR2400 pressures. rap of pipe penetration a
pplications
Sleeves are prim
arily used for vib
ration
Design applications w
here the ductwork fla
nges are present and a
complete frame
■ Least expensive design pressures.
assembly is preferred
. This style works we
ll for high temperatu
re applications.
lied endless or open e
nded for field-w
■■ Supp Least expensive d
esign
■ Complete drop-in assemb
ly
es reduce cost ■■ Supplied with worm
gear band clamps Supplied endless or open ended
for field-wrap o
f pipe penetratio
n applications
aterial■ Prefabricated standard fram ■■ For vibration applicationsr Teflon belt m Supplied with worm gear
band clamps
ith gaskets fo■ Belting hardware accessible from
outside
■■ Provided w For vibration app
lications
■ Best choice when adjac
ent structures or equip
ment cannot permit lin
er
Sleeves ■ Provided wi
th gaskets for Te
flon belt materia
l
SR2400 protrusion
beyond attachment fla
nge.
Sleeves
■ Accepts shop welded flo
w liner
pillow design■
Readily accepts eared
■ Used to fill large breech
openings
ction■ Accommodates large lateral m
ovements
ck for belt prote■
Provides proper setba
12
nassembled. 14 assembled or u 14
y expansion joints are furnishedSenior Flexonics Pathwa bled.
bled or unassem sembled.
mbled or unasnics Pathway expansion joints are furnished assem
Senior Flexo way expansion joints are furnished ass
e
Senior Flexonics Path
STEP
The basic
8
part number
is now
Belt Options Span
Duct Size
complete.
For a unassembled Flexon
Material Accessories F - F
Inside
Dimension
1000CB material on a
SR2400 frame with a
cavity accumulation pillow
and a flow deflector 120
Flexon 1000 CAP - FD 14 120 x 96
inches wide by 96 inches
high with 14 inches active
length for maximum
Flexon 1000 CAP - FD 356 3048 x 2438
continuous operating
conditions of 450°F and
12 inches water column.
NOTES:
Torsion and angular movement capabilities may be obtained by
consulting Senior Flexonics Pathway's engineering department. Larger
spans are possible, depending on system pressures and movements,
and require consultation of Senior Flexonics Pathway's engineering
STEP List the Face to Face Dimension department. Non-standard face to face dimensions are available.
7 (distance between the mating duct Movements must be specified in the description accompanying the
flanges) in which the expansion joint
part number. A significant difference exists between the movement
is to be installed. This dimension
capabilities of round expansion joints and large rectangular joints (sides
should not be confused with the active length.
exceeding 3’ length). This difference is due to the folding characteristics
of the fabric element, which vary depending on whether it is attached
to straight or curved flanges.
-––[MOVEMENT ]–-–
CAPABILITIES
The system thermal expansions are the differential
expansion/contraction of operating and/or excursion
temperatures and the minimum ambient temperature during
installation and shutdowns. The expansion joint engineer uses theses nonmetallic expansion
movements and temperatures to select the proper material and design for
each expansion joint. Senior Flexonics Pathway’
joints frequently can handle combined axial, lateral, angular and torsional.
movements in a single assembly
The expansion joint locations can often be optimized, reducing the total number required. Consideration should be
given for accessibility and belt replacement, for new ducting systems, it may be more economical for the duct fabricator
to provide a portion of the expansion joint frame.- The amount of duct movement occurring in either or both
Lateral Movement
of the two perpendicular planes to the longitudinal axis of the duct,
which moves the expansion joint flanges out of alignment.
- The dimensional shortening
Axial Compression/Extension
See page 7 for
(compression) or lengthening (extension) of the expansion joint s longitudinal axis.
face-to-face dimension parallel to it’
CAUTION- The amount of twisting movement (in degrees)
Torsional Deflection
occurring in the perpendicular planes to the longitudinal axis of
the duct system.
- The amount of rotation (in degrees) of the duct
technical data.
Angular Deflection
system which flexes the expansion joint flanges out of parallel position. BREACH OPENING
with each other FACE-TO-FACE
PABILITIE
S
12” (305mm)9” (229mm)
TYPICAL M
OVEMENT
CA
6” (152mm) 4” (102mm)Active Length 3” (76mm)
Belt Type 2” (51mm) 1/2” (13mm)Axial Compression 1/2” (13mm)
1/2” (13mm) 2” (51mm) Set Back Installation temperature and duct tolerances must be considered inSingle Layer 2” (38mm)
nt Axial Extension 1 1/Fabric Eleme 1” (25mm) 2” (51mm)
Lateral 1 1/2” (38mm) Active Lengt
h
(Non-concurrent) 1” (25mm) 1/4” (6mm)Axial Compression 1/4” (6mm)
1/4” (6mm) 1” (25mm)
Composite Belt Axial Extension 3/4” (19mm) Active Len
gth
1/2” (13mm) 4” (102mm)
(Concurrent) Lateral 3” (76mm)2” (51mm) 1/2” (13mm)
Axial Compression 1/2” (13mm)
Integrally Flanged 1/2” (13mm) 2” (51mm)Axial Extension 1 1/2” (38mm) Set determining installed face to face dimensions and movements.
Single Layer 1” (25mm) BackLateral
(Concurrent) nonconcurrent or concurrent
Breach orovements exceed those listed above or differ from m). Exceeding these F/F DOM
Notes: ust be made when m m), lateral + 1/4” (6m1. Special considerations m ent.
m), axial compression 1/2” (13m elt movemratings. Consult with factory for these applications.l extension 1/4” (6m
tolerances: Axia2. Breaching ent capabilities. ld lateral offset (preset) to reduce the relative bill affect movem
tolerances w m) should utilize coent exceeding 3” (76m
3. Lateral movem
7
22
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