Crane Home
  Home  |  About Us  |  Contact Us  |  My Account  |  Careers  |  Links  |  Email Translator  |  
Translate!



  Product Families
  Product Dimensions
  Spec Assistance
  Ask the Pipe Doctor
  Liner Types
  Chem. Resistance
  CONQUEST®
  Product Specs
  Special Applications
  Tech Library
  Tools & Fabrication
  Inst. & Maintenance
  Find a Distributor
  FAQ








R6904 2-Convolute TEFLON® PTFE Expansion Joint

Resistoflex 2-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 ±
1 1 3/8 1/4 2 1 7/8 1/8 104 80 104 2 FV/450
1 1/2 1 3/8 1/4 2 7/8 2 27/64 1/8 320 180 224 3
2 1 9/16 1/4 3 5/8 3 1/8 512 300 240 7
2 1/2 2 1/4 5/16 4 1/8 3 1/2 1/8 457 278 328 10
3 2 1/4 3/8 5 4 1/2 3/16 648 320 319 10
4 2 5/8 1/2 6 3/16 5 1/2 1/4 480 280 400 18 FV/400
5 3 1/4 1/2 7 5/16 6 1/2 1/4 440 440 320 24
6 2 3/4 1/2 8 1/2 8 1/4 440 386 440 29
8 4 1/2 10 5/8 10 5/64 1/4 450 390 480 47 FV/250
10 5 1/4 1/2 12 3/4 11 3/4 1/4 760 600 580 64
12 6 1/2 15 15 1/4 3300 420 700 115 FV/75
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.
12" size supplied only with crest rings in stainless steel.
† This is an installation dimension not a limit bolt setting.
NOTE: Angular Deflection approx. 7°.
Consult Factory for spring rates for angular deflection.

2-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 R6904-016WD R6904-016BD N/A R6904-016WS R6904-016BS BS6904B-016
1 1/2 R6904-024WD R6904-024BD R6904-024WS R6904-024BS BS6904B-024
2 R6904-032WD R6904-032BD R6904-032WS R6904-032BS BS6904B-032
2 1/2 R6904-040WD R6904-040BD N/A N/A BS6904B-040
3 R6904-048WD R6904-048BD R6904-048WS R6904-048BS BS6904B-048
4 R6904-064WD R6904-064BD R6904-064WS R6904-064BS BS6904B-064
5 R6904-080WD R6904-080BD N/A N/A BS6904B-080
6 R6904-096WD R6904-096BD R6904-096WD-N R6904-096WS R6904-096BS BS6904B-096
8 R6904-128WD R6904-128BD R6904-128WD-N N/A N/A BS6904B-128
10 R6904-160WD R6904-160BD R6904-160WD-N BS6904B-160
12 R6904-192WD R6904-192BD N/A BS6904B-192

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®.

"This page is a machine translation of the source page, which is written in
English. This translation is intended to provide a general idea of the
page's content, and is not guaranteed for accuracy."