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December 18, 2024

How does the PTFE lined bellow expansion joint?

The PTFE Lined Bellow Expansion Joint is a device that uses a flexible bellows to compensate for the thermal expansion and contraction of the pipeline, absorb vibration and displacement. It is mainly composed of metal bellows, end pipes, flanges and sealing materials. In terms of working principle, the PTFE bellows compensator achieves elastic deformation through its internal corrugated structure. This deformation can occur when the pipeline expands due to heat or contracts due to cooling, thereby compensating for the change in the length of the pipeline.
When the temperature of the medium in the pipeline system changes, the bellows will stretch or shrink accordingly. Because the bellows has good flexibility and elasticity, it can absorb these changes without excessive stress. This compensation effect helps to reduce stress concentration in the pipeline system and extend the service life of the pipeline and its accessories.
In the superheated steam environment, the PTFE coating of the PTFE lined Bellow Expansion Joint can provide additional high temperature resistance, protect the bellows from high temperature damage, and maintain its sealing performance. The non-stickiness and chemical inertness of PTFE materials make the compensator resistant to most chemical corrosion and suitable for conveying various corrosive media.
In practical applications, the design and size of the PTFE bellows compensator will be determined according to the specific requirements of the pipeline system to ensure safe and effective operation within the expected operating temperature and pressure range. During installation, appropriate guiding and fixing measures must also be considered to ensure that the compensator can expand and contract freely without unnecessary constraints.
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