Galvanised spiral ducting, spiral tube and ductwork fittings for commercial, industrial and HVAC ventilation systems across the UK.
Our spiral ducting tube is available in a wide range of diameters, with matching bends, reducers, branches, dampers and other spiral duct fittings. Our ductwork complies with DW144, the recognised UK specification for sheet metal ductwork.
Spiral ductwork provides an efficient way to supply fresh air and extract stale or contaminated air from buildings. Its circular construction and long 3m tube lengths reduce the number of joints required compared with rectangular ductwork, helping to minimise air leakage throughout the system.
We supply a large range of spiral ductwork products including 45° bends, 90° bends, 60° bends, Y pieces, T pieces, reducers, saddles, shoes & boots, volume control dampers, blast gate dampers, round access doors and flat access doors.
Our galvanised spiral ducting is suitable for commercial ventilation, industrial extraction and HVAC installations where reliable airflow and reduced leakage are important. Spiral ducting can carry air at temperatures of around 200°C continuously and around 250°C intermittently. Using it above the recommended temperatures may result in discolouration or corrosion. Read more about spiral ducting and fittings.
We supply spiral tube and duct fittings in a wide range of sizes, helping contractors, installers and facilities managers source complete spiral ductwork systems from a UK supplier. Products not listed online may also be available.
For product advice, availability or larger requirements, contact us at orders@alphatube.co.uk.
Flanged spigot branch made from galvanised steel. A male connection to fit into spiral ducting, flexible tube etc. Available in sizes ranging from 63mm – 710mm. Bigger sizes available by phone or email enquiries.
*Please note* some of the more uncommon sizes may have a larger lead time.
Cap ends made from galvanised steel with male ends to fit inside spiral ducting. Cap ends are used to terminate ducting runs. Available in sizes ranging from 63mm – 630mm. Bigger sizes available by phone or email enquiries.
*Please note* some of the more uncommon sizes may have a larger lead time.
*Please note* depending on size, some cap ends can act as a female connection.
Volume Control Damper made from galvanised steel. The dampers have male ends to fit inside ducting or other female fittings. They are used for manually balancing the flow of the air in ducting runs with a single circular blade. Bigger sizes available by phone or email enquiries.
*Please note* some of the more uncommon sizes may have a larger lead time.
Manufactured from cast aluminium with a galvanised shut off blade. These circular dampers are ideal for use on extract systems in the woodwork industry where by you can shut off parts of a system that are not in need of a constant flow.
*Please note* other sizes may be available by telephone or email enquiries.
T-piece 90-degree branch made from galvanised steel. Male ends to fit in spiral ducting, flexible tube etc. Available in sizes ranging from 63mm – 710mm. Bigger sizes available by phone or email enquiries.
Mesh end caps manufactured from galvanised steel with tabbed ends designed to fit on the outside of spiral ducting. Available in sizes ranging from 63mm upwards. Other sizes available by phone or email enquiry and may have a different connection.
