Characteristic of Bellows Designs Single Ply Typical Application * Shell and tube heat exchangers * Clamshell bellows * Penetration seals * HVAC piping Characteristics * One ply * Relatively thick * Robust * Higher spring rate * High lateral stiffness * Relatively cheap * Good NDE when installed

Characteristics of Bellows Designs Multi-Ply * Each ply made from welded tube * Each ply leak proof * Wetted ply can be made of different (higher alloy) material for enhanced corrosion resistance * Allowance for weep holes Multi-ply (Spiral)* Inner/Outer plies welded* No sudden leak* Wetted

Tied Expansion Joint Designs Tied Expansioin Joints Most Common Types:Hinged Expansion Joints In-line pressure Balance Expansion JointGimbaled Expansion Joints Tied Single & Universal Expansion Joints Features:Single or dual bellows with restraining hardware Typically used for high pressure servic

Untied Expansion Joint Designs Untied Expansion Joints Most Common Types: Axial Expansion Joints Double Expansion JointInternally Guided Expansion joint Untied Universal Expansion Joints Pressure Balanced Expansion Joint Features :Single or dual bellows with installation fittings only Commonly used

There are introductions of types of movements will a rubber expansion joint handle and the function of a rubber expansion joint.That must be help you to learn more about a rubber expansion joint.

In modern expansion joints, the metal bellows expansion joints are often produced with a so-called multi-ply design. And multiple thin plies of metal are layered to form the bellows walls to increase both flexibility and stability.

Expansion Joint Movements Angular Rotation Bellows neutral Bellows rotated Lateral Movement Lateral Movement using a Using a Single Bellows Double or Universal Bellows Bellows Bellows Neutral

Bellows Movements Axial Movement Bellows neutral Bellows compressed Bellows expanded Bellow Flexibility A bellows consists of one or more convolutions and each convolution can have a position that is neutral , extended or compressed. l Bellows (convolution) in neutral position

The compensator's function is to improve performance and achieve stability, and in the aspect of technologies, electronics and optics, compensators have its own principle.

Factors Determining the Selection of Bellows expansion joint The selection of expansion joint for a particular application is influenced by six primary considerations: Temperature Pressure Media Size End Fittings Motion