Single Unrestrained
   
     

These expansion joints are made of one single bellows element with end connections.

Regardless of accessories, such as liners and covers, this model absorbs all of the movements in any one length of piping but it is mainly used to absorb axial movements.

It does not restrain pressure thrust so adequate anchors and guides must be provided and they can be used only in piping systems that incorporate correctly designed anchors and pipe alignment guides

Features:
- Absorbs axial, lateral, and angular movements
- Must be properly guided
- Does not restrain the pressure thrust
- Requires main and directional anchors

 
 
 
Single Tied
 

These expansion joints are made of one single bellows element with end connections.

Regardless of accessories, such as liners and covers, this model absorbs all of the movements in any one length of piping but it is mainly used to absorb axial movements. It does not restrain pressure thrust so adequate anchors and guides must be provided and they can be used only in piping systems that incorporate correctly designed anchors and pipe alignment guides.


 

 

 
 
Hinged
     
 

These expansion joints are made of one single or double bellows element fitted with welding ends or flanges plus a system of articulated supports which allow for angular movement in one plane only. The hinge mechanism is designed to accept full pressure thrust These units do not allow axial.

Features:
- Absorbs angular movements in a single plane
- Restrains pressure thrust forces
- Supports dead weight
- Avoid twisting the bellows
- No main anchors required

 
 
Universal Unrestrained
       
   

Also known as the universal un-tied expansion joint this model is made up of two bellows joined together by a central pipe.

Although it can be used to absorb any combination of the three basic movements it is mainly used to absorb large lateral movements.

It does not restrain pressure thrust so adequate anchors and guides must be provided and they can be used only in a piping systems that incorporate correctly designed anchors and pipe alignment guides.

Features:
- Allow axial, lateral and angular movements
- Accept large amounts of lateral deflection
- Do not restrain pressure thrust
- Adequate anchors and guides must be provided

 

 
 
Universal Tied
       
       
   

This model is made up of two bellows joined together by a central pipe and a system of tie rods able to withstand the thrust produced by the internal pressure.

This model is used to absorb lateral movements in all planes.

The tie rods are provided in sets of two or more, equally distributed around the circumference of the expansion joint.

The amount of lateral deflection capability can be increased or decreased by simply changing the length of the spool pipe and the thermal expansion of the central pipe is taken by the bellows elements.


Features:
- Absorbs lateral movements in all planes
- Restrains pressure thrust
- Adequate anchors and guides must be provided

 

 
 
Gimbal
   

Gimbal Expansion Joints are made of one single or double bellows element designed to allow angular movement in any plane by the use of two pairs of hinges affixed to a common floating gimbal ring.

The gimbal ring, hinged and pins are designed to restrain the pressure thrust due to internal pressure and shear forces. 
A gimbal ring is either round or square.

Features:
- Absorbs angular movements in all planes
- Restrains pressure thrust forces
- Supports dead weight
- Avoid twisting the bellows
- No main anchors required

   
 
 
 
 
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