Clamp Together Ducting
(Clamp Together Duct – Rolled Lip Ducting – compatible with all major brands of quick, rolled-lip, connecting ducting)
Our Laser Welded Clamp Together Ducting (CTD) is a ducting system that incorporates a gasketed, over-center clamp to draw together and seal the rolled lip formed on the end of ALL components.
The system is available in galvanized and SS material. Standard gauges range from 18-24 gauge with the rolled lip formed directly onto the pipe- as an integral part of the pipe. The system is also available in gauges up to 10 gauge. In this configuration a separate collar is used on the end of the pipe and fitted to the pipe the same as if it were a fitting.
The Clamp Together Ducting system is infinitely adjustable, owing to the use of an adjustable sleeve and the adjustable collar found on each fitting. This feature, combined with the clamping action greatly reduces installation time so as to be 70% faster than standard spiral or flanged duct. Elbows of multiple styles, branches, cut-offs, reducers, adapters and hoods are all fitted with the adjustable collars to further speed the installation.
Straight Duct: The duct is a nominal 5 feet in length– the variation being by the diameter of the pipe and the corresponding size of the rolled lip. The standard gauge duct is first formed by cutting stock sheet metal to specific widths. After rolling, the rolled duct is laser welded to a completely sealed seam. The final forming of the rolled lip onto the duct is accomplished by using opposing dies in a 5’ hydraulic press.
Duct Standard Gauges for the duct are 26 ga for 3”, 24 ga for 4-6”, 22 ga for 7-12” and 20 ga for sizes 13-22”. Typically, all sizes can go 2 gauges heavier and still have the rolled lip formed onto the end. But the duct is also available in gauges up to and including 10 gauge. At the higher gauges and dependent upon the size, a collar is applied to welded duct or tubing.
Elbows: Elbows are available in a variety of styles depending upon the diameter, radius (length of turn), and gauge and material required. These include welded halves with a longitudinally welded seam, formed tube elbows, and gore/segmented elbow which are mechanically locked or fully welded to form the elbow. Typical degrees are 90, 60, 45 and 30 degree with standard radii of 1, 1.5 and 2.5 x Diameter. BUT ALL DEGREES AND ALL RADII ARE AVAILABLE. Elbows are typically two gauge heavier than the duct.
Branches: (Lateral, T on tapers, Y’s, double Branches, etc.): These are built to specification with the lightest gauge being 18 gauge. The laterals are FULLY welded to the body for a smooth transition. Standard degrees are 30, 45 or 90.
Cut-offs and Blast Gates: Standard cut-offs consist of aluminum body gates with either galvanized or SS blades. Other options include
– Fabricated galvanized or SS bodies
- Full welded air tight galvanized or SS bodies
- Fabricated bodies with UHMW seals that press against the blade
– Automatic gates- pneumatically operated/electrically activated- in any of the above styles. Cylinders require a minimum of 90 psi. Activating voltages can be 12 or 24V AC or DC and line voltage up to 240V.
Miscellaneous Fittings: Adapters, hoods, transitions, reducers et al. are available to specification. Gauge is dependent upon size and application but range from 22 to 10 ga.