HVAC High Temperature Applications
For long term high temperature exposure

HVAC Metal Bellows
Metal bellows specifically designed for HVAC applications in a range of styles to suit your piping

HVAC Metal Bellow
What is an HVAC Metal Bellow?
High temperature design with flanged, copper or union ends...
- Design
Extensive range of metal bellows suitable for a wide range of HVAC services. - Performance
High quality bellows manufactured in 316 stainless steel. - Application
Potable water, heating water, steam. - Web Shop
Available online with next day delivery from our web shop.
Copper End HVAC Metal Bellows
Union End HVAC Metal Bellows
Size | Length | Pressure Rating | Movement | In Shop |
---|---|---|---|---|
DN012-½" | 181 | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
DN020-¾" | 187 | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
DN025-1" | 191 | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
DN032-1¼" | 207 | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
DN040-1½" | 215 | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
DN050-2" | 229 | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
Short Axial HVAC Metal Bellows
Size | Length | Pressure Rating | Movement | In Shop |
---|---|---|---|---|
DN032-1¼" | 180 | 16 Barg @ 180 ºC | Axial +/- 12 mm | Yes |
DN040-1½" | 180 | 16 Barg @ 180 ºC | Axial +/- 15 mm | Yes |
DN050-2" | 180 | 16 Barg @ 180 ºC | Axial +/- 15 mm | Yes |
DN065-2½" | 180 | 16 Barg @ 180 ºC | Axial +/- 15 mm | Yes |
DN080-3" | 180 | 16 Barg @ 180 ºC | Axial +/- 15 mm | Yes |
DN100-4" | 180 | 16 Barg @ 180 ºC | Axial +/- 15 mm | Yes |
DN125-5" | 180 | 16 Barg @ 180 ºC | Axial +/- 15 mm | Yes |
DN150-6" | 180 | 16 Barg @ 180 ºC | Axial +/- 15 mm | Yes |
DN200-8" | 220 | 16 Barg @ 180 ºC | Axial +/- 15 mm | Yes |
DN250-10" | 220 | 16 Barg @ 180 ºC | Axial +/- 15 mm | Yes |
Long Axial HVAC Metal Bellows
HVAC Pump Metal Bellows
How to specify a metal expansion joint






Can't quite find the right bellow?
Try the FlexEJ Bellows Finder
Or call our expert team on +44 (0) 1384 881188
FlexEJ's HVAC Metal Bellows
FlexEJ's has the following ranges of HVAC Metal Bellows available:
HVAC COPPER END METAL BELLOWS
EN1057 Table X copper ends
FlexEJ's copper ended bellows are WRAS approved for drinking water. Minimum length designs for axial compression with 316 stainless steel bellows rated at 6 Barg @ 90°C
HVAC UNION END METAL BELLOWS
EN10242 Female union ends
Union ended bellows. Minimum length designs for axial compression with 316 stainless steel bellows rated at 6 Barg @ 150°C
HVAC LONG AXIAL BELLOWS
EJMA calculated punch formed bellows
FlexEJ's Long Axial range offer large axial movements. Stainless Steel 316 bellows, designed to EJMA, manufactured by punch forming. Minimum overall length design with PN16 carbon steel flanges. These expansion joints are rated for applications up to 16 Barg @ 180°C.
SHORT AXIAL METAL BELLOWS
EJMA calculated punch formed bellows
FlexEJ's Short Axial range offer moderate axial movements and are consequently shorter overall. Stainless Steel 316 bellows, designed to EJMA, manufactured by punch forming. Minimum overall length design with PN16 carbon steel flanges. These expansion joints are rated for applications up to 16 Barg @ 180°C.
HVAC PUMP BELLOWS
EJMA calculated punch formed bellows
FlexEJ's Pump range offer small lateral movements suited to pump alignment and vibration applications. Available as tied and untied. Stainless Steel 316 bellows, designed to EJMA, manufactured by punch forming. Minimum overall length design with PN16 carbon steel flanges. These expansion joints are rated for applications up to 16 Barg @ 180°C.
Got a quick question?
Use Live Chat. Or call us.
For instant advice use the Live Chat link to message one of the sales team. Or call them direct on +44 (0) 1384 881188
HVAC flanged axial bellows comparison chart
Which is the best flanged metal bellow for your application? Four potential alternatives to consider:
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
Not sure what flange spec you need?
Use the FlexEJ Flange Finder to find out
FlexEJ stock a full range of specs and types for our bellows. Or call our expert team on +44 (0) 1384 881188.
Who can you talk to?
Try our sales and customer service team on 01384 881188
They don't bite. And they know what they're talking about. Call the team any time from 8:30am to 3:30pm weekdays, 12:30pm Fridays or use LIVE CHAT if you would prefer a quick text answer. For more complex queries, send us any pro-forma documentation using the get a quote form below or email us sales@flexej.co.uk.
Can't see what you want? Need help?
Call us. Or use Live Chat.
For instant advice. We can custom-design and engineer almost any expansion joint you need for delivery in the UK or worldwide. Call our expert team on +44 (0) 1384 881188. Or email us sales@flexej.co.uk
Frequently Asked Questions
Please visit our full FAQ page to see all our frequently asked questions.
Need a detailed quote?
Get A Quote. On us.
We will provide full technical details together with, pricing and shipping timescales. For more complex engineered quotes, preliminary sketches and calculations will be available.
Got a quick question?
Use Live Chat. Or call us.
For instant advice use the Live Chat link to message one of the sales team. Or call them direct on +44 (0) 1384 881188
Get A Quote
Please complete the short form here and we'll get back to you within 24hrs Monday to Friday (quicker if marked urgent).
Alternatively, you can also call our expert team directly on +44 (0) 1384 881 118 from 8:30AM to 4:30PM weekdays (12:30PM Fridays), who will be only too pleased to talk through your requirements and technical queries over the phone.
Visitors are also welcome Monday to Friday although please get in touch beforehand to let us know you're coming.

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.

