Bellows made up to your requirements and special lengths on request
A PTFE bellow is a flexible, accordion-like component made from Polytetrafluoroethylene (PTFE), a highly chemical-resistant and low-friction fluoropolymer. It is used to absorb movement, vibration, or misalignment in piping systems, while also providing excellent resistance to corrosive fluids and extreme temperatures.
Standard bellow:
2 convolution EN8A
3 convolution EN8B
High pressure series bellows with steel outer caps increasing pressure capabilities.
Here’s how this enhancement works:
- Reinforcement for Pressure Containment: The core of the solution is a high-quality PTFE bellow, which provides the crucial chemical and temperature resistance by being the wetted part in contact with the media. However, to withstand higher internal pressures, this PTFE bellow is externally reinforced.
- Steel Outer Caps/Shells: These are typically made from stainless steel or other high-strength alloys (sometimes referred to as “armored bellows” or “metal-reinforced PTFE bellows”). These metallic components encase the PTFE convolutions, providing external support and restricting the outward bulging or stretching of the PTFE under pressure.
- Increased Pressure Ratings: By containing the PTFE’s natural tendency to deform under pressure, the steel outer caps allow the overall bellow assembly to operate at significantly higher pressures than a standalone PTFE bellow. This is particularly vital in applications where aggressive chemicals also need to be handled under demanding pressure conditions.
- Enhanced Structural Integrity: The steel reinforcement adds structural rigidity to the PTFE bellow, making it more robust and resistant to external forces, mechanical damage, and sudden pressure surges.
Some of our various bellows:
