Layflat Duct 450mm x 120mtr (Fits 285mm diameter outlets)
Layflat Duct 450 mm x 120 m (fits 285 mm diameter outlets). A roll of wide layflat polyethylene tubing for machines with large outlets, cut to length on site to carry air where it is needed.
What It Is For
- Ducting air from equipment with 285 mm diameter outlets, where a 300 mm or 355 mm roll is too small.
- Directing dry or filtered air into a drying chamber, void or another room.
- Carrying exhaust air out of a work area or containment.
Specifications
| Brand | Signet |
|---|---|
| SKU | F268-450 |
| Flat width | 450 mm |
| Opens to (calculated) | About 286 mm diameter |
| Length | 120 m |
| Fits | 285 mm diameter outlets |
| Material | Polyethylene tubing |
| Thickness | Not confirmed — ask us |
Signet sells a natural 450 mm x 120 m poly tubing at 150 micron. CCW has not yet confirmed that this roll is that product, so the thickness is not stated here.
Which Machines?
CCW does not list specific machines for this size. Measure the outside diameter of your machine's outlet spigot: this roll opens to about 286 mm, so it suits outlets of about 285 mm. For smaller outlets see the sizing table below, and if you are unsure send us the machine make and model.
Sizing Layflat Duct
Layflat duct is described by its flat width, not by the outlet it fits. A 300 mm layflat duct opens to roughly a 200 mm circle. Match the duct to the machine outlet, not to a number that sounds similar.
The round size is simple geometry: the circumference is twice the flat width, so the open diameter is about the flat width × 2 ÷ 3.14. The table below uses that calculation for the rolls CCW lists.
| Roll | Flat width | Opens to about | CCW lists it for | Length |
|---|---|---|---|---|
| Layflat Duct 300 mm x 362 m | 300 mm | 191 mm | 200 mm outlets | 362 m |
| Layflat Duct 300 mm x 100 m | 300 mm | 191 mm | 200 mm outlets | 100 m |
| Layflat Duct 355 mm x 152 m | 355 mm | 226 mm | 200 mm to 225 mm outlets | 152 m |
| Layflat Duct 450 mm x 120 m | 450 mm | 286 mm | 285 mm outlets | 120 m |
The Phoenix 250 mm and Phoenix 355 mm rolls are named by their round diameter, not their flat width, so they are not directly comparable with the rolls above.
Keep It Short and Keep the Bends Gentle
Every metre of duct and every tight bend costs airflow, and the loss is not proportional — a kinked duct can cut delivery to almost nothing while the machine sounds exactly the same. If a ducted setup is not drying, shorten the run before you add another machine.
Fitting and Using It
- Cut the length you need with a sharp blade, such as the Film Cutting Knife, keeping the cut square.
- Slip the duct over the machine outlet and secure it with duct tape or a strap so it cannot blow off.
- Run it as straight as the job allows, with gentle bends and no kinks, and keep it off hot surfaces and sharp edges.
- Where the duct passes through a containment wall or doorway, seal around it so the barrier stays intact.
- Check the run during monitoring visits. A split or a crushed section is cheaper to replace than to tolerate.
Treat poly duct as a consumable. Duct used on Category 3 water, sewage or mould jobs should be disposed of with other contaminated materials in line with the job's remediation plan, not carried to the next site.
Frequently Asked Questions
Why is a 450 mm duct listed for a 285 mm outlet?
Because 450 mm is the width of the tube laid flat. Opened into a circle it is about 286 mm across.
Will it fit a 250 mm or 300 mm outlet?
Not well. On a 250 mm outlet it will be loose and hard to seal; on a 300 mm outlet it will not open wide enough. Match the roll to the outlet using the table above.
Can I reuse layflat duct?
Undamaged duct from a clean-water job can be rolled up and reused. Duct from contaminated or mould jobs should be disposed of with other contaminated materials.
Related Products
- Layflat Duct 300 mm x 362 m (200 mm outlets)
- Layflat Duct 355 mm x 152 m (200 mm to 225 mm outlets)
- Film Cutting Knife
- Containment & Ducting Systems
- Structural Drying
Tell us the machine or tool and we will confirm the part before you order.
