Metallic Expansion Joints - Thorburn Flex Inc

THORBURN
FLEXIBLE PIPING SPECIALIST
DUCTFLEX SERIES DFRU AND DFRV
UNIVERSAL DUAL-FLEX RECTANGULAR METALLIC EXPANSION JOINTS
E
N
D
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WW - WELD ENDS
L O.A.L.
L
37.5°
L
FF - FLANGED ENDS
O.A.L.
L
Series Number Axial Spring Bellows Minimum Overall Length Approx. Weight
Convolutions of Move- Rate Length (LL) (inches) (pounds/Perimeter ft)
Pressure Cons. ment (L)
inches lbs/in/in inches inches
Perimeter
WW FF WW FF
DFRU
"U" Shape
2 1/2" high x 2" pitch
± 400" H 2
O at
800ºF
DFRVZ
"U" Shape
5" high x 2" pitch
± 100" H 2
O at
800ºF
DFRV
"V" Shape
7" high x 2.5" pitch
± 100" H 2
O at
800ºF
1 + 1 1.50 18.0 2 8 14 14 17 35
2 + 2 3.00 9.0 4 12 18 18 19 37
3 + 3 4.50 6.0 6 16 22 22 21 39
4 + 4 6.00 4.5 8 20 26 26 23 41
5 + 5 7.50 3.5 10 24 30 30 25 43
6 + 6 9.00 3.0 12 28 36 36 27 45
7 + 7 10.50 2.5 14 32 38 38 29 47
8 + 8 12.00 2.375 16 36 42 42 31 49
1 + 1 2.50 4.0 2 9 15 15 18 36
2 + 2 5.00 2.0 4 13 19 19 22 40
3 + 3 7.50 1.3 6 17 23 23 26 44
4 + 4 10.00 1.0 8 21 27 27 30 48
5 + 5 12.50 0.8 10 25 31 31 34 52
1 + 1 3.50 1.5 2.5 10 16 16 18 37
2 + 2 7.00 0.8 5.0 15 21 21 23 41
3 + 3 10.50 0.5 7.5 20 26 26 27 45
4 + 4 14.00 0.4 10.0 25 31 31 31 49
5 + 5 17.50 0.3 12.5 30 36 36 35 53
FOR ORDER INFORMATION, PLEASE SEE PAGE 78
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C
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V
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TECHNICAL NOTES TO CONSIDER WHEN SPECIFYING THORBURN DUCTFLEX
To specify liners, add L to part number and
advise Thorburn of specific movements to
properly size liner. On combination ends
specify flow direction. Liners must be specified
by client when flow velocity exceeds
25 FPS or where abrasive particles in the
gas stream could cause erosion of the
bellows.
To specify covers, add C to part number.
M
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A
L
S
Bellows: Cover, liner and end
material must be stated in part
number.
SEE PAGE 12 FOR CODE DETAILS
Bands: 1/4" THK X 2" wide, A36/44W
Weld ends: 1/4" THK X 3" wide, A36/44W
Flanges: 3 X 3 X 3/8, A36/44W
Liners: 1/8" THK, A36/44W
Covers: 11 gauge, A36/44W
SEE NOTE 7
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1. Pressure range shown is the maximum and minimum
pressures for which these catalogue expansion joints
are rated. In order to provide the proper reinforcement
for your pressures, the maximum and minimum design
pressures in inches of water (H 2
O) MUST be specified
in the catalogue part number as shown on page 78.
2. The convolution height shown is nominal.
3. Installation position MUST be specified in the catalogue
part number to provide proper center duct support for
Dualflex Series.
4. Max extension = 50% max compression.
5. Temperature rating is -20ºF to 800ºF for carbon steel
duct components. Actual temperature should be
specified.
6. Ends, bellows and liner material must be compatible
with application media and temperature and pressure.
7. For temperatures exceeding 800ºF, MCOT A36 material
is not recommended. For higher temperature,
compatible materials should be used.
Page 79