We design, engineer and manufacture high quality,precision made edge welded metal bellows here in the UK


Edge Welded Bellows Solutions

EWB Solutions Ltd

Unit 18 Brickfields Industrial Estate,

Finway Road,

Hemel Hempstead

Hertfordshire

HP2 7QA

Telephone

+44(0)1442 263195


Where you can count on expertise and service

Copyright EWB Solutions Ltd 2015

VAT No. 731 511471 Company Registration No. 3755592

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Vacuum Connectors

Sensors

Accumulators

Aneroid Devices

Valve Stem Sealing


An Edge Welded Bellows is manufactured by welding a series of diaphragms together using a highly controlled and very precise Micro TIG  or Plasma welding process.

No material is added during the fusion process and the resultant welds beads have a bright appearance of very uniform shape. (Cross section left)

By measuring the shape, or geometry, of the welds we quality and test the consistency of this specialised welding process.

The diaphragms are often described as "crinkly washers" but are in fact precision pressed components having inside and outside diameters with a rippled profile formed in the surface.

Usually very thin materials are used in the production of the diaphragms, typically 0.05 mm to 0.25 mm thick in Stainless Steel, but often in more exotic alloys like Monel, Hastelloy, Inconel, Titanium etc.

It is usual to have a so-called Male and Female  form to the diaphragms ensuring the bellows fully nests without the diaphragms interfering.



The solid length of a welded bellows is not much more than the total thickness of all the diaphragms used plus a small design allowance.The Male and Female diaphragms are first welded together at their inside diameters to form a welded pair or convolution. The convolutions are then welded together at their outside diameters to form the Bellows. By leak checking the finished Bellows on a Mass Spectrometer and taking weld measurements during production it is possible to produce a bellows with high integrity welds equal to the most demanding applications.


Large Size Range

Bellows Manufacturing

Process- A brief description.


-Vacuum inside or outside.

-Aneroid   devices

-Lateral offset movements

-Long axial stroking.

-Limited space applications

-Pressure damping

-Accumulators

-Hermetic seals


Just some of the current EWB applications