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Circular Spiral Duct Connectors Male Coupling With Rubber Seal
Product Name: Circular Spiral Duct Connectors Male Coupling With Rubber Seal
- Designed for connecting circular spiral ducts.
- Material: Galvanized steel
- Thickness: 0.6mm
- Diameter range:from 80mm to 800mm
- Bigger sizes can be produced as per request
Wall thickness / gauge
0.6mm
Material
Galvanized steel
Notes
Designed for connecting circular spiral ducts.; Bigger sizes can be produced as per request
Related in this range
What it is
This unit is in Galvanized steel / 0.6mm. A circular spiral duct connector is a male coupling tube used to join two spiral ducts, and to adapt from spiral duct to a flat collar, a diffuser or a plenum. It carries the same spiral ripple as the duct itself, so the inside surface behaves the same way under airflow and the joint stays straight over long runs.
The connector is rolled and interlocked rather than welded on the standard part, which keeps the galvanizing intact and keeps the part light enough to handle on a roof or in a ceiling void with one person. It is supplied in the diameter of the duct you are running, and the male profile slides inside the female end of the next length.
It is the part that most often gets shortened by mistake on site. Get the diameter and the length of the overlap right at the quotation stage and you avoid the classic come-back of a truck of connectors that do not fit the duct already installed.
Technical specification
| Wall thickness / gauge | 0.6mm |
|---|---|
| Material | Galvanized steel |
| Notes | Designed for connecting circular spiral ducts.; Bigger sizes can be produced as per request |
How to choose the right one
- Measure the spiral duct diameter, not the flanger outer diameter — the connector has to match the inner bead of your duct.
- Choose the gauge to the duct gauge. A 0.6 mm connector on a 0.6 mm duct keeps the joint stiff; using a lighter gauge on a heavier duct just makes the joint the weak point.
- For outdoor or roof runs, use a heavier gauge and check the coating — a thin connector exposed to rain and condensation is what fails first.
- Ask for bigger diameters if your duct goes above the standard size range; they are produced to order rather than stocked.
Material and finish options
| Material | Finish | Typical use |
|---|---|---|
| Galvanized steel 0.6 mm | Zinc plating | Standard indoor supply and extract spiral duct |
| Galvanized steel (heavier gauge) | Zinc plating | Outdoor, roof, long unsupported spans |
| Stainless steel on request | Mill finish | Wet plant rooms, coastal, food plant |
Installation
- 1Cut the duct ends square; a ragged end makes the connector sit off-centre.
- 2Slide the male connector into the female end of the previous length so that at least the full overlap depth is engaged.
- 3Fix with self-drilling screws through the overlapping wall — two per joint per side is normally enough on low pressure.
- 4For higher pressure or for roof plant, add a stainless band clamp over the joint and seal the seam with foil tape or mastic.
- 5Support the joint: a connector spanning a hanger gap is the joint that rattles loose within a season.
Where it is used
Commercial fit-out
Ceiling void supply runs off a main riser.
Industrial extraction
Low speed extract ductwork in workshops.
Rooftop plant
Connections between AHU outlets and riser ducts.
Packaging, shipping and OEM
| Minimum order quantity | MOQ is normally 300–500 pcs per model for stock items and 500 pcs per model for made-to-order sizes |
|---|---|
| Lead time | 25-30 days for standard sizes after order confirmation; tooling for new tooling parts starts around 35 days |
| Samples | Sample pieces can be sent 3-5 days against your specification; courier cost is on the buyer side for the first trial order |
| Packing | Standard export packing: bulk in corrugated cartons with pallet on request; retail colour box and printed barcode available for OEM orders |
| OEM | OEM is available — item code, laser logo, carton print and retail box can all carry your brand |
| Trade terms | FOB Ningbo / Shanghai; T/T 30% deposit before production and 70% against copy of B/L |
Frequently asked questions
Related parts and capabilities
Circular spiral duct connectors — full rangeSheet metal stampingCNC bendingSurface treatmentCustom fabrication capabilityRequest a quotation
Not sure which variant fits? Send the drawing, the profile width or the outside diameter and we will confirm the part before you order. Email sales@climatecarer.com
Drawing
| Item Code | Dia(mm) | d(mm) | H(mm) | W(kg) | |
|---|---|---|---|---|---|
| VX 080 | 80 | 78.9 | 40 | 0.12 | |
| VX 100 | 100 | 98.9 | 40 | 0.15 | |
| VX 125 | 125 | 123.8 | 40 | 0.19 | |
| VX 150 | 150 | 148.7 | 40 | 0.21 | |
| VX 160 | 160 | 158.7 | 40 | 0.23 | |
| VX 180 | 180 | 178.6 | 40 | 0.26 | |
| VX 200 | 200 | 198.6 | 40 | 0.29 | |
| VX 225 | 225 | 223.6 | 40 | 0.33 | |
| VX 250 | 250 | 248.5 | 40 | 0.37 | |
| VX 280 | 280 | 278.5 | 40 | 0.4 | |
| VX 300 | 300 | 298.5 | 40 | 0.43 | |
| VX 315 | 315 | 313.4 | 40 | 0.46 | |
| VX 355 | 355 | 353.3 | 40 | 0.5 | |
| VX 400 | 400 | 398.3 | 40 | 0.67 | |
| VX 450 | 450 | 447.6 | 55 | 0.95 | |
| VX 500 | 500 | 498.3 | 55 | 1.06 | |
| VX 560 | 560 | 558.8 | 55 | 1.19 | |
| VX 630 | 630 | 629.9 | 70 | 2.01 | |
| VX 710 | 710 | 708.2 | 70 | 2.26 | |
| VX 800 | 800 | 797.5 | 70 | 3.9 |
