HVAC Union End Metal Bellows
For axial compression with a BSP union swivel at both ends.
24hr Shipping
On all stock items ordered.
Mon-Thur by 2pm, 10am Fridays
Design & Manufacturing
Full in-house design & manufacture to EN / ASME / PED.
ISO14001 Accreditation
FlexEJ has an accredited Environmental Management System.
Union End Metal Bellows
FlexEJ union-end HVAC axial compression expansion joints come with a BSP union swivel at both ends complete with fibre washer and stainless steel convoluted bellows from DN15 (15mm) to DN50 (50mm):
HVAC Union End Bellows
HVAC Union End Bellows
HVAC Union End Bellows
HVAC Union End Bellows
HVAC Union End Bellows
HVAC Union End Bellows
PRODUCT GUIDES
HVAC METAL BELLOWS
WHAT IS A UNION END METAL BELLOW?
BSP FEMALE UNIONS FOR THREADED CONNECTIONS AND AXIAL COMPRESSION..
Materials
Stainless steel 316 bellows with iron BSP unions.
Application
Heating water and most water services, not suitable for drinking water.
Rating
6 Barg @ 150°C.
Web Shop
Available online with next day delivery from our web shop.
UNION END HVAC METAL BELLOWS
| SIZE | LENGTH | PRESSURE RATING | MOVEMENT | IN SHOP |
|---|---|---|---|---|
| DN12-½” | 181 mm | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
| DN20-¾” | 187 mm | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
| DN25-1″ | 191 mm | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
| DN32-1¼” | 207 mm | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
| DN40-1½” | 215 mm | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
| DN50-2″ | 229 mm | 6 Barg @ 150 ºC | Axial +0/-25 mm | Yes |
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.
An overview of FlexEJ's HVAC Union End Metal Bellows
FlexEJ’s Union End Metal Bellows are for use on threaded connections and axial compression:
| 316 stainless steel bellows | Threaded female BSP |
| Iron swivel unions | Rated 6 Barg @ 150°C |
| Minimum length design | For axial compression |
Specifications
HVAC Union End Metal Bellows Finders and Calculators
We have several easy to use tools and calculators to help you find the right HVAC Union End Metal Bellow from our online stock with next-day UK delivery. Our Thermal Expansion Calculator for Piping helps you estimate the increase in length of a pipe run with temperature.
Our Advanced Bellows Finder is a quick way to navigate our stock range of bellows, both metal and rubber. With just a few choices you can arrive at the appropriate selection – criteria include pipe size, type, media compatibility, installation length, pressure rating, pipe connection type, conformance and movement axial, lateral and angular. All the products are in the online store with 24hr shipping as standard. If you’re not sure what flange you need, our handy Flange Finder should also be useful.Stock HVAC Union End Metal Bellows Finder
Do search for union end metal bellows by pipe size, intended media and/or connection hardware to see FlexEJ’s stock bellows options below but don’t hesitate to call us on 01384 881188 or email us for more bespoke or OEM options or if you need any advice at all.
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
HVAC flanged axial bellows comparison chart
Is this the best flanged metal bellow for your application? Three 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
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
A. Our Flange Finder contains details for many common flanges. Typically, to be able to make the identification you need to know the bore size or outside diameter and number of bolts. For technical assistance contact us or use our Live Chat facility.
A. Yes, FlexEJ has full design capability for engineered metal expansion joints and can work to any recognised standard – typically EJMA, B31.3/Appendix X, EN14917 plus PED and/or other customer specifications. Engineered rubber expansion joints are typically designed to meet the FSA guidelines plus PED and/or other customer specifications For technical assistance please contact us or use the Live Help link on this page.
A. Yes, if you have the details we can normally offer an equivalent, our FAQ here gives the information we will need for a full selection. For technical assistance please contact us or use the Live Chat link on this page.
A. To identify an existing expansion joint we need to know: nominal bore, overall length and flange type plus service, temperature, pressure and required movement if known. Try our Flange Finder to help identify the flange and you can send us a picture of the existing part using the Contact us form. For technical assistance please contact us or use the LIVE CHAT link on this page.
A. Yes, our MRCA copper ended metal expansion joints also have WRAS approval. We laso have DWI approval for stainless steel expansion joints. For technical assistance please contact us or use the Live Chat link on this page.