The Full PTFE Bellows Expansion Joint is a flexible connector designed for highly corrosive, high-temperature, and high-pressure environments. Constructed entirely from polytetrafluoroethylene (PTFE), it offers exceptional chemical resistance, sealing performance, and flexibility. This product is widely used in industries such as chemical processing, pharmaceuticals, electroplating, and environmental engineering.
| Nominal diameter |
Wave number |
Pressure rating(MPa) | Length | ||||
| 0.6 | 1.0 | 1.6 | Flange (mm) |
Take over | |||
| mm | Inch | Axial Compenstion(mm),Rigidity(N/mm) | |||||
| 32 | 1¼ | 8 | 22/26 | 20/26 | 18/63 | 160/250 | 264/280 |
| 32 | 1¼ | 16 | 46/14 | 41/14 | 36/32 | 224/291 | 316/321 |
| 40 | 1½ | 8 | 22/44 | 20/44 | 18/89 | 164/259 | 269/289 |
| 40 | 1½ | 16 | 46/22 | 41/22 | 36/45 | 230/304 | 319/334 |
| 50 | 2 | 8 | 22/51 | 20/70 | 18/70 | 172/276 | 282/306 |
| 50 | 2 | 16 | 46/26 | 41/22 | 36/35 | 204/342 | 347/372 |
| 65 | 2½ | 8 | 30/35 | 20/70 | 22/55 | 215/294 | 300/322 |
| 65 | 2½ | 12 | 38/22 | 41/35 | 34/40 | 260/334 | 340/362 |
| 80 | 3 | 8 | 36/26 | 26/44 | 28/41 | 240/338 | 344/366 |
| 80 | 3 | 10 | 49/17 | 38/32 | 43/26 | 270/368 | 323/345 |
| 100 | 4 | 6 | 45/60 | 34/33 | 35/93 | 235/317 | 374/390 |
| 100 | 4 | 10 | 74/32 | 49/21 | 57/50 | 305/381 | 387/409 |
| 125 | 5 | 5 | 42/47 | 40/75 | 34/74 | 282/314 | 316/342 |
| 125 | 5 | 9 | 77/29 | 64/40 | 58/45 | 382/386 | 388/414 |
| 150 | 6 | 5 | 44/50 | 38/59 | 34/78 | 282/339 | 338/367 |
| 150 | 6 | 8 | 71/43 | 66/36 | 54/59 | 356/399 | 402/427 |
| 200 | 8 | 4 | 46/55 | 40/62 | 38/78 | 280/348 | 348/372 |
| 200 | 8 | 6 | 65/44 | 64/51 | 53/58 | 340/402 | 402/426 |
| 250 | 10 | 4 | 65/34 | 42/68 | 52/45 | 315/379 | 415/379 |
| 250 | 10 | 6 | 97/21 | 59/52 | 79/39 | 393/459 | 493/399 |
| 300 | 12 | 4 | 65/62 | 59/42 | 52/65 | 366/427 | 466/467 |
| 300 | 12 | 6 | 97/41 | 87/35 | 79/41 | 464/525 | 564/565 |
| 350 | 14 | 4 | 65/58 | 59/59 | 52/74 | 397/452 | 497/492 |
| 350 | 14 | 6 | 97/39 | 87/37 | 79/48 | 509/564 | 609/604 |
| 400 | 16 | 4 | 97/35 | 59/67 | 52/68 | 412/478 | 512/518 |
| 400 | 16 | 6 | 145/22 | 87/44 | 79/47 | 522/588 | 622/628 |
| 450 | 18 | 4 | 97/64 | 59/62 | 79/41 | 403/498 | 503/523 |
| 450 | 18 | 6 | 145/37 | 87/43 | 118/25 | 503/658 | 603/648 |
| 500 | 20 | 4 | 97/80 | 87/37 | 79/75 | 431/523 | 531/544 |
| 500 | 20 | 6 | 145/37 | 131/39 | 118/43 | 531/665 | 631/742 |
| 600 | 24 | 4 | 97/80 | 87/85 | 79/94 | 478/548 | 578/588 |
| 600 | 24 | 6 | 145/45 | 131/49 | 118/53 | 658/579 | 758/781 |
| 700 | 28 | 4 | 97/72 | 87/77 | 79/85 | 490 | 590 |
| 700 | 28 | 6 | 145/45 | 131/49 | 118/53 | 690 | 790 |
| 800 | 32 | 4 | 108/95 | 102/102 | 94/112 | 502 | 602 |
Product Features:
100% PTFE Material: Highly resistant to all kinds of corrosive chemicals including strong acids, bases, and solvents.
High Temperature Resistance: Operates reliably in environments up to +260°C.
Excellent Flexibility: Effectively absorbs thermal expansion and mechanical vibrations.
Superior Aging Resistance: Durable and maintains structural integrity over time.
Outstanding Sealing Performance: Prevents leaks and maintains system safety.
Applications:
Acid and alkali transportation pipelines in chemical plants
Clean pipeline systems in the pharmaceutical industry
Corrosion-resistant piping in food processing
Electroplating and surface treatment systems
Delivery of corrosive gases or liquids in industrial setups
Optional Specifications:
Nominal Diameter: DN25 to DN600
Pressure Rating: PN0.6MPa - PN1.6MPa
Working Temperature: -20°C to +260°C
Connection Type: Flanged, with optional stainless steel flanges
PTFE Liner Thickness: 3mm - 6mm (customizable)
