Air & Dirt Separators for HVAC HEATING AND COOLING SYSTEMS
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.
Air & Dirt Separators
FlexEJ Air, Dirt and Air & Dirt Separators can be used in both heating and cooling systems. These robust and cost effective units are manufactured in our UK factory.
Air Separator
Dirt Separator
Air & Dirt Separator
PRODUCT GUIDES
AIR & DIRT SEPARATORS
WHAT IS AN AIR & DIRT SEPARATOR?
AIR & DIRT SEPARATORS ARE USED TO REMOVE AIR BUBBLES AND DIRT PARTICLES FROM HVAC PIPING SYSTEMS…
Materials
Carbon steel with PN16 flanges.
Application
Heating water and cooling water services, not suitable for drinking water.
Rating
10 Barg @ 110°C.
Web Shop
Available online with next day delivery from our web shop.
DIRT SEPARATOR
| SIZE | PRESSURE RATING | SPECIFICATION | IN SHOP |
|---|---|---|---|
| DN50-2″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 350 mm, overall height 560 mm | Yes |
| DN65-2½″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 350 mm, overall height 560 mm | Yes |
| DN80-3″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 460 mm, overall height 710 mm | Yes |
| DN100-4″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 460 mm, overall height 710 mm | Yes |
| DN125-5″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 630 mm, overall height 980 mm | Yes |
| DN150-6″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 630 mm, overall height 980 mm | Yes |
AIR SEPARATOR
| SIZE | PRESSURE RATING | SPECIFICATION | IN SHOP |
|---|---|---|---|
| DN50-2″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 350 mm, overall height 555 mm | Yes |
| DN65-2½″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 350 mm, overall height 555 mm | Yes |
| DN80-3″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 460 mm, overall height 705 mm | Yes |
| DN100-4″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 460 mm, overall height 705 mm | Yes |
| DN125-5″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 630 mm, overall height 975 mm | Yes |
| DN150-6″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 630 mm, overall height 975 mm | Yes |
AIR AND DIRT SEPARATOR
| SIZE | PRESSURE RATING | SPECIFICATION | IN SHOP |
|---|---|---|---|
| DN32-1¼″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 300 mm, overall height 667 mm | Yes |
| DN40-1½″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 300 mm, overall height 667 mm | Yes |
| DN50-2″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 350 mm, overall height 705 mm | Yes |
| DN65-2½″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 350 mm, overall height 705 mm | Yes |
| DN80-3″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 460 mm, overall height 855 mm | Yes |
| DN100-4″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 460 mm, overall height 855 mm | Yes |
| DN125-5″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 630 mm overall height 1125 mm | Yes |
| DN150-6″ | 10 Barg @ 110 ºC | Flanged PN16, installation length nominally 630 mm overall height 1125 mm | Yes |
Air & Dirt Separation in HVAC Systems
All these products are designed to protect and optimise your heating or cooling system. These products are normally positioned as follows:Air or Air & Dirt Separator ~ boiler flow lines.
Dirt Separator ~ boiler return lines.
Dosing pots ~ main flow and return.
Low Loss Headers ~ between the boilers and system.
FlexEJ's Air & Dirt Separators
FlexEJ’s manufactures Air, Dirt and combined Air & Dirt Separators in the UK. They can all be bought direct from our web shop on a 24hr dispatch basis (Monday to Thursday). FlexEJ can also manufacture to meet specific client requirements, please get in touch if you do need a custom-designed air & dirt separator built for a specific size or need.
| Air Separators | Dirt Separators |
| Air & Dirt Separators | Custom fabrication options |
FlexEJ Air & Dirt Separators
DN50 to DN150
Features
- Carbon steel body
- PN16 flanges
- DN25 drain ball valve
- Flamco AAV with integral shut-off valve
- Stainless steel internals
Stock Air & Dirt Separator Finder
Do try our air & dirt separator product finder (below) to check if we have a stock air & dirt separator size and specification that meets your needs. If not then do call us on the usual 01384 881188 or use LIVEÂ CHAT or drop a note or specification to us via our Get A Quote page. We can also help with technicalities, drawings and whatever you need – including flange ends identification although do try our handy Flange Finder if you simply need to identify flange connections needed.
Stock Air & Dirt Separator Finder
Search for FlexEJ air & dirt separators by connection (pipe) size required, intended HVAC use and/or connection hardware (type):
Air & Dirt Comparison Chart
Three alternative product configurations to consider plus the option for design and build:
Air separation 
Air Separation
Is this unit recommended for air removal in UK HVAC heating systems?
Dirt separation Dirt Separation
Is this unit recommended for dirt removal in UK HVAC heating systems?
Air & Dirt separation Air & Dirt Separation
Is this unit recommended for air and dirt removal in UK HVAC heating systems?
Ratings barg/°C Pressure & temperature
What is the required pressure rating (in barg) compared to temperature rating for this bellow?
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, the majority of FlexEJ’s current range of Air and Dirt Separators are available from the FlexEJ shop on a same-day despatch basis although our largest Air and Dirt Separators (DN100 to DN150) need to be pallet-delivered and require an extra 2-3 days for delivery. We can also supply Air and Dirt Separators on an ongoing OEM basis and can cater for custom requirements. Please ask for details.
A. Most of our air & dirt separators are available from stock on a 24hr delivery basis. Non-stock separators or custom-manufactured items typically take 7-14 working days, depending on options and quantities required.
Please visit our full FAQ page to see all our frequently asked questions.