Specialized Items
PTFE Expansion Bellows — 1–8 in (25–200 mm) nominal bore
Single layer joints with crossed and laminated PTFE film inner surface, designed to reduce noise and absorb expansion, contraction and minor piping misalignment. Sizes 1" (25 mm) to 8" (200 mm).
Technical specifications
| Dimensional availability | 1–8 in (25–200 mm) nominal bore |
|---|---|
| Tolerances | Face-to-face and flange dimensions to approved drawing; CNC work available to ±0.05 mm where applicable |
| Available grades | Virgin PTFE, 15% Glass-filled PTFE, 25% Glass-filled PTFE, 25% Carbon-filled PTFE, Bronze-filled PTFE |
| ASTM test references | ASTM D4894, ASTM D4745 |
Final dimensions, tolerances and material grade are confirmed against your drawing and service conditions.
Interactive product model
Buyer questions
Which grades are available for PTFE Expansion Bellows?
Virgin PTFE, 15% Glass-filled PTFE, 25% Glass-filled PTFE, 25% Carbon-filled PTFE, Bronze-filled PTFE are available subject to size, quantity and service requirements.
Can PTFE Expansion Bellows be manufactured to a drawing?
Yes. Face-to-face and flange dimensions to approved drawing; CNC work available to ±0.05 mm where applicable. Final tolerances are confirmed during quotation.
What is the continuous operating temperature of PTFE?
Virgin PTFE is commonly specified for continuous service from approximately -200°C to +260°C. Actual limits depend on load, pressure, filler grade and the process medium.
Selecting a filled grade? Read our PTFE vs Teflon engineering guide.