Overview

With changes in pressure or temperature, metal bellows can be used to compensate for the volumetric changes of the liquid or gas through expansion and contraction. Whether a liquid is heated or a cryogenic tank is being filled, edge welded bellows can bridge the gap between thermal or pressure differentials to ensure that the system remains operational.  BellowsTech can integrate custom machined components or standard threads and fittings.  For outdoor or industrial environments, BellowsTech will incorporate a housing for the bellows for protection. Edge welded bellows technology can be pressurized internally and externally.  For example, in sub-sea vehicles, bellows can be combined with sensors to compensate for the differential pressure of the sea water and hydraulic fluid. Edge welded bellows can be manufactured in miniature sizes and offer a high stroke length.  Light-weight materials can be used to minimize overall system weight. Let BellowsTech know the pressures expected to be measured, and our engineering staff can assist with a designed to your specifications.  BellowsTech can also offer liquid filling services to compensate for external pressures. With a variety of materials, sizes and configurations, BellowsTech edge welded bellows can be designed to meet your requirements.

Bellows DD Form12-21B

Specifications – Volume Compensators – PDF

Common Materials 316L SS, AM 350, Titanium
Thickness 0.002″ and up every 0.001″
Standard Leak Rate <1×10-9 std CC He/sec
Size Ranges
Outside Diameter 0.358″ (9.0932mm) to 26″ (660mm)*
Inside Diameter 0.15″ (3.8mm) to 25.5″ (648mm)*
Shapes Round standard. Non-Round Available; Contact Factory.
Length Up to 96 inches (244 cm)

*For other dimensional requirements, contact the factory

volume-compensator-bellows2

There are over 90 Standard Diaphragm sizes available.

View the entire die list here and quickly choose the best fitting bellows mechanical seal for your application