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R6906 5-Convolute PTFE Expansion Joints

Resistoflex 5-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.)
Neutral Length Maximum Travel
+ Or -
1 3 1/2 2 1 57/64 1/2 30 44 22 2
1 1/2 3 1/2 3/4 2 7/8 2 35/64 1/2 75 83 46 5
2 4 1 3 5/8 3 13/32 1/2 60 47 50 9
3 5 1 5 4 41/64 1/2 55 60 170 14
4 5 1/4 1 1/4 6 3/16 5 11/16 5/8 72 60 80 20
6 6 1 1/4 8 1/2 8 5/8 190 130 195 31
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. 20°.
Consult Factory for spring rates for angular deflection.
R6906 Bellows is not recommended for vacuum service.

5-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 R6906-016WD R6906-016BD N/A R6906-016WS N/A BS6906B-016
1 1/2 R6906-024WD R6906-024BD R6906-024WS R6906-024BS BS6906B-024
2 R6906-032WD R6906-032BD R6906-032WS R6906-032BS BS6906B-032
3 R6906-048WD R6906-048BD N/A R6906-048BS BS6906B-048
4 R6906-064WD R6906-064BD R6906-064WD-N R6906-064BS BS6906B-064
6 R6906-096WD R6906-096BD R6906-096WD-N R6906-096WS R6906-096BS BS6906B-096

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 registered Trademark of E.I. du Pont de Nemours and Company and is used under license by CRANE Resistoflex.


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