PTFE Expansion Joint

BGF Type PTFE Bellows Expansion Joint Product Introduction

The BGF type PTFE bellows expansion joint features an advanced design consisting of 2, 3, or 5 molded white PTFE convolutions. Each convolution is reinforced with metal rings, significantly enhancing the pressure-bearing capacity and overall structural stability of the bellows, ensuring excellent sealing performance and durability even under high-pressure conditions.

This product is equipped with standard galvanized carbon steel flanges, which are fully covered by the lips of the PTFE bellows. This design effectively prevents the medium from directly contacting the metal surfaces, achieving complete isolation between the medium and metal. As a result, all surfaces exposed to the medium are made of corrosion-resistant PTFE material, greatly extending the product’s service life. It is especially suitable for piping systems that transport corrosive media.

To ensure safe operation and facilitate installation, the BGF expansion joint comes factory-installed with steel limit rods that restrict excessive expansion and contraction during operation, protecting the piping system from damage caused by excessive displacement. Additionally, the increased number of convolutions not only improves the joint’s pressure resistance but also significantly enhances its movement compensation capabilities, effectively absorbing axial, lateral, and angular displacements to meet the multi-directional movement compensation needs of complex piping systems.

The right side shows our Songjiang PTFE expansion joint installed in a chemical pipeline application.