Open-ended metal bellows – Closed-ended metal bellows – Double-Ply Bellows


 

Open-ended metal bellows:

 

Efficient hydroforming technology

 

Mera Bellows applies hydroforming to construct the bellows convolutions. In order to supply open-ended seamless bellows, the closed ends of the tubes are cut using an additional working step. This production process takes great advantage of automated handling and leak testing. The ends of the bellows can be chosen in almost any shape. We have a long standing proven record in processing bronze, brass and different kinds of stainless steels. Mera Bellows is also able to handle special materials like e.g. Monel and Beryllium-Copper alloys.

Applications: sealing elements (bellows valves), flexible connectors, force-transmission, couplings.

Available bellows sizes – Table

Min [mm] Max [mm]
Inside-Ø 4,2 ± 0,1 70,0 ± 0,3
Outside-Ø 6,0 ± 0,2 100 ± 0,5
Wall thickness 0,065 ± 0,004 0,40 ± 0,025

Table: Minimum and maximum bellows diameter

 


 

Closed-ended metal bellows

 

made of seamless precision tubes

 

Mera Bellows production techniques allow the option of one closed end.
The bottom of our metal bellows can be formed in almost any way. Connection points or other design features may be integrated to meet your specific requirements.

Different bottom shapes

Different bottom shapes

 

Advantages: The force transmission through the use of our metal bellows is possible without additional soldering or welding. Thus, the customer is able to save valuable working time and resources. Additionally the customer has the ability to resolve any problems that could arise from soldered or welded seams.

Applications: Pressure switches, sensors, temperature regulation in the measurement and control technology

Available bellows sizes – Table

Min [mm] Max [mm]
Inside-Ø 4,2 ± 0,1 70,0 ± 0,3
Outside-Ø 6,0 ± 0,2 100 ± 0,5
Wall thickness 0,065 ± 0,004 0,40 ± 0,025

Table: Minimum and maximum bellows diameter

 


 

Double-Ply Bellows:

 

Better safe than sorry

 

Mera Bellows has a long-standing tradition in producing two-ply metal bellows. In order to produce such special bellows, two tubes have to be fit into each other before forming the convolutions. In doing so, one has to pay a great deal of attention and accuracy to the diameter of the tubes and to scrupulously clean the surface.

Cross section of a two-ply bellows

Cross section of a two-ply bellows

 

The most common Application is the use of a flexible sealing element. The great advantage of double-ply bellows is the high reliability against leaking – primarily at high working pressures: In the case of one wall breaking, the other one is still working as a seal.

Available bellows sizes – Table

Min [mm] Max [mm]
Inside-Ø 4,2 ± 0,1 70,0 ± 0,3
Outside-Ø 6,0 ± 0,2 100 ± 0,5
Wall thickness 0,065 ± 0,004 0,40 ± 0,025

Table: Minimum and maximum bellows diameter