Pharmaceutical & Aseptic Metal Bellows
Self draining, high surface finish stainless steel throughout, suitable for aseptic applications, steam cleaning and higher temperatures than achievable by any elastomer - typically 270°C and 10 BarG.
Large AxialMovement
InstallationRods
Self-DrainingPharmaceutical
Pharmaceutical Metal Bellows
What is a Pharmaceutical Metal Bellows?
Self draining, high surface finish, special convolution profile...
- Design
Engineered metal bellows designed to meet your project requirements. - Application
Hygienic and aseptic applications, pharmaceutical. - Configurable
Movement and length depending on diameter, flanges, weld ends, materials can all be specified to order. - Rating
Typically 10 Barg @ 270°C, designed to specification.
How to specify a metal expansion joint
We design and manufacture metal expansion joints so you are not restricted to our range of standard products, some of which are available in our web shop. For simpler applications a standard product may be entirely suitable but if not we will design to meet your exact requirements.
Metal bellows have a defined fatigue life based on movement cycles. Understanding the movements, if they are concurrent or not and the realistic number of times the movements can occur is fundamental to metal bellows design.
Metal bellows work well up to around 500ºC, above that we use insulation to control the actual bellows metal temperature if the media is above this temperature. Pressure and temperature must be known to select a metal expansion joint.
The most common material used for metal bellows is Stainless Steel - 304, 321, 316 - and for more demanding applications Nickel Alloys - 625, 800, 825. Corrosion is the most likely failure mode for the bellows itself so the correct material selection is important.
Our standard ranges have set lengths for each diameter / movement range but we can design to meet your exact requirements. Making the bellows longer will increase the available movement. Most commonly a flange, we can provide to any specification, or pipe weld ends. Our HVAC standard product is available with BSP Union ends and Copper Pipe ends. If you are uncertain about what flange type you already have installed our Flange Finder will help you identify it.
Call our expert team on +44 (0) 1384 881188 or email us at sales@flexej.co.uk or use Live Chat on this web site - we are here to help, please get in touch.
An overview of FlexEJ's Pharmaceutical Metal Bellows
FlexEJ's Pharmaceutical Metal Bellows for hygienic and aseptic applications
| 316 stainless steel bellows | No liner, internals all exposed for cleaning |
| Open bellows profile ensure free draining | Typical rated 10 Barg @ 270°C |
| Fully engineered to your specification | EJMA calculated bellows |
Specifications
For ratings and dimensions please see factsheet.
Pharmaceutical metal bellows comparison chart
Is a FlexEJ pharmaceutical metal bellow the best for your application? Four potential alternatives to consider - note alternatives are only suitable for non aseptic/hygienic applications in a Pharmaceutical plant:
Stainless steel bellow 
Bellows Material and Design
Is the bellows Stainless Steel and calculated to EJMA?
Flow Liner Flow Liner
Is a Flow Liner included?
Any flange / weld end Any Flange or Weld End
Is any common flange type or pipe weld end available?
Range of lengths Range of lengths
Can an overall length greater than minimum be specified?
Rating barg/°C
Industry experience
FLEXEJ Ltd was formed in 2002 by two professional engineers who brought together an already highly respected design capability with business and commercial skills gained in large multinational companies.
- Our focus has always been on application and design – helping our customers find the best value solution.
- We have a strong engineering and manufacturing team with experience in petrochemicals, refining, nuclear, desalination though to HVAC.
- The team is also very familiar with meeting complex requirements for documentation, in process NDT and test on projects. We have supplied many large end-users such as EDF, Exxon, Shell, Reliance & QatarGas working with major contractors such as JGC, Foster Wheeler & Technip.
