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R6905 3-Convolute TEFLON® PTFE Expansion Joints

Resistoflex 3-convolute expansion joints are contour molded of TEFLON® PTFE by a patented process. They are corrosion resistant, non-aging, with extraordinary flex life and reliability. The flexible element is formed over the full sealing face of the end flanges eliminating troublesome separate gaskets.
Ductile Iron Flange

Installation

Bolt Torque Data

Testing
 
Convert To Metric Units
Size (I.D.)
(in.)
A † B C Maximum
Misalignment*
Compression Force
Spring Rate
(lbf / in.)
Extension Force
Spring Rate
(lbf / in.)
Misalignment Force
Spring Rate
(lbf / in.)
Weight (lbs.) Vacuum Rating
(in. Hg/°F)
Neutral Length Maximum Travel
+ Or -
1 1 3/4 1/2 2 1 57/64 1/4 190 82 96 2 FV/400
1 1/2 2 1/2 2 7/8 2 35/64 1/4 84 66 108 4
2 2 3/4 3/4 3 5/8 3 13/32 3/8 69 76 109 8
2 1/2 3 3/16 3/4 4 1/8 3 13/16 3/8 91 97 160 11
3 3 5/8 1 5 4 41/64 1/2 124 125 194 13
4 3 5/8 1 6 3/16 5 11/16 1/2 220 155 264 19
5 4 1 7 5/16 6 5/8 1/2 320 210 324 25 FV/300
6 4 1 1/8 8 1/2 8 9/16 289 187 266 30
8 6 1 1/8 10 5/8 10 5/16 9/16 178 218 423 48 FV/125
All Dimensions in inches.
*At neutral length with limit bolts in place.
Maximum (axial) travel is based on installation with no misalignment or angular defection.
† This is an installation dimension not a limit bolt setting.
NOTE: Angular Deflection approx. 14°.
Consult Factory for spring rates for angular deflection.

3-Convolute PTFE Expansion Joints
Nom. Dia.
(in.)
DI Flanges & Hardware DI Flanges & Hardware
w/ Nozzle
316 SS Flanges & Hardware Replacement Limit
Bolt Hardware*
(Stainless Steel)
White Liner Black Liner White Liner White Liner Black Liner
1 R6905-016WD R6905-016BD N/A R6905-016WS R6905-016BS BS6905B-016
1 1/2 R6905-024WD R6905-024BD R6905-024WS R6905-024BS BS6905B-024
2 R6905-032WD R6905-032BD R6905-032WD-N R6905-032WS R6905-032BS BS6905B-032
2 1/2 R6905-040WD R6905-040BD N/A N/A N/A BS6905B-040
3 R6905-048WD R6905-048BD R6905-048WD-N R6905-048WS R6905-048BS BS6905B-048
4 R6905-064WD R6905-064BD N/A R6905-064WS R6905-064BS BS6905B-064
5 R6905-080WD R6905-080BD N/A N/A BS6905B-080
6 R6905-096WD R6905-096BD R6905-096WD-N R6905-096WS R6905-096BS BS6905B-096
8 R6905-128WD R6905-128BD R6905-128WD-N R6905-128WS R6905-128BS BS6905B-128

Pipe Motion may be absorbed by an expansion joint

"Maximum Travel" (±) may be called longitudinal movement or axial compression and extension. It is based on installation with no misalignment or angular deflection.

"Maximum Misalignment" may also be referred to as lateral offset or deflection. It is based on installation with no axial travel or angular deflection. "Maximum Angular Deflection" may be called angular rotation. It is based on installation with no axial travel or lateral offset.
Non-Shock Working Pressure vs. Temperature

 

TEFLON® is a trademark of DuPont. Only DuPont makes TEFLON®.

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