R6904 2-Convolute PTFE Expansion Joint		Resistoflex R-Series 2-convolute expansion joints are contour molded of Teflon® T-62 PTFE by a patented process. R-Series expansion joints use limit bolts to control overextension during expansion, and NITRONIC 50 reinforcing rings. Wrap around safety shields are specifically designed to provide sprayout protection and are required in hazardous service. Learn more
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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