FlexEJ Value HVAC Rubber Bellows - Union
FlexEJ's Value Union rubber bellows are ideal for smaller diameter applications at lower temperatures and pressures where WRAS drinking water approval is not required. Length of 200mm (240mm at DN65) all with BSP Unions, DN20 to DN65:
HVACUnion End
HVACUnion End
HVACUnion End
HVACUnion End
HVACUnion End
HVACUnion End
HVAC Rubber Bellows - Union
What is a FlexEJ Value HVAC rubber Bellows?
Value choice for lower temperatures...
- Materials
EPDM with galvanised cast iron unions. - Application
Water: LT heating, waste, sanitary, chilled. - Rating
PN10 at +20°C and PN06 at +95°C. BSP Unions. - Approvals
Not approved for drinking water.
How to select an HVAC rubber bellows
Temperature is the most critical as it directly influences the choice of rubber - but also the actual pressure capability of the bellows. The stated maximum rated pressure is maintained up to around 50ºC for most rubber bellows, for higher temperatures check the data in the Range tab.
The rubber compound used for the inner layer of the bellows must be compatible with the working fluid. Drinking water requires a WRAS approved EPDM, oils require Nitrile and so on - our Bellows Finder can help you with finding the right rubber.
Moulded bellows are manufactured in set combinations of diameters and lengths. However, our handmade Safetech range can be manufactured in any diameter and length to suit your application, only the more standard sizes are shown on the Safetech range tab.
Any flange drilling can be supplied; if you are uncertain about what you already have installed our Flange Finder will help you identify it. The HVAC and Elaflex ranges have swivel flanges; the Safetech range has full face rubber flanges. Our web shop stock is PN10/16. Bellows will exert a pressure force on the pipe (see FAQ) which must be restrained or absorbed at the piping anchors. All our flanged rubber expansion joints are available with tie rods and we can offer hinges or gimbals on the Elaflex and Safetech products.
Moulded rubber bellows have a defined movement range, which is shown for each type in the Range tab, movements listed are non-concurrent (see FAQ). A Safetech bellows will be designed to meet your required movements.
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.
FlexEJ's HVAC Union End Rubber Bellows
FlexEJ's HVAC Union End rubber bellows offer excellent value for many small bore building services applications:
| BSP Unions | EPDM rubber lining |
| All metal parts galvanised | In stock for quick delivery |
| Twin sphere design | Swivel connections |
Specifications
All sizes available from the web shop...
For detailed specifications please see our catalogue.
HVAC Union End rubber bellows comparison chart
Is the HVAC Union End rubber bellows the best option for your application? Two potential alternatives to consider:
WRAS approved 
WRAS approved bellows
Is this bellow approved for use in all UK public mains water supplies?
Potable water Potable water
Is this bellow approved for water systems used for drinking and food preparation?
Rating barg/°C Pressure & temperature
What is the required pressure rating (in barg) compared to temperature rating for this bellow?
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.
