Uni-Gasket® Self-Sealing Fittings Reduce Assembly Time and Costs

Uni-Gasket fittings will save you money because they reduce assembly time about 30 to 40 percent by eliminating joint sealing (assembly time excludes the time to hang duct). They feature a single-leg EPDM rubber gasket, held in place with a 180° hemmed edge, that provides a reliable, airtight seal.
Testing has shown that this design meets or exceeds SMACNA's Class 3 for leakage (-20 inches wg to +20 inches wg). Fittings are secured to the duct with self-tapping screws uniformly located around the circumference as per SMACNA standards.

Standard Uni-Gasket® Fittings — sizes and gauges

Uni-Gasket Single-Wall, Round Fittings
Construction Spot or tack welded and sealed
Lap and riveted/screwed and sealed
Solid Welded
Standing seam and lap resistance welded
Diameters1 3-24 inches
Materials3,4 Galvanized Steel
Thicknesses2 26-22 gauge
Notes
  1. Uni-Gasket single-wall, round fittings are available with the following diameters: 3- through 12-inch diameters in 1-inch-diameter increments, and 14- through 24-inch diameters in 2-inch-diameter increments.
  2. Uni-Gasket single-wall, round fittings constructed with 20 gauge galvanized steel are available on special order.
  3. Uni-Gasket single-wall, round fittings are also available in carbon steel, paintable galvanized steel, and types 304 and 316 stainless steel on special order.
  4. Uni-Gasket single-wall, round fittings with SilverGuard™ coating (pre-coated with an EPA registered antimicrobial) are available on special order.
Uni-Gasket Double-Wall, Round Fittings
Construction Spot or tack welded and sealed
Lap and riveted/screwed and sealed
Solid Welded
Standing seam and lap resistance welded
Insulation Thickness1
1 inch
2 inches
3 inches 		Inner Liner Diameters2
3-22 inches
3-20 inches
3-18 inches
Materials5,6 Galvanized Steel
Thicknesses3,4 26-22 gauge
Notes
  1. Standard insulation density is 1.0 pcf.
  2. Uni-Gasket double-wall, round duct and fittings are available with the following outer shell dimensions: 5- through 12-inch diameters in 1-inch-diameter increments and 14- through 24-inch diameters in 2-inch-diameter increments. Standard fitting liners are solid metal. Standard insulation is fiberglass.
  3. Inner liners for Uni-Gasket double-wall, round fittings are 26 gauge.
  4. Uni-Gasket double-wall, round fittings constructed with 20 gauge galvanized steel outer shells are available on special order.
  5. Uni-Gasket double-wall, round fittings are also available in carbon steel, paintable galvanized steel, and types 304 and 316 stainless steel on special order.
  6. Uni-Gasket double-wall, round fittings with SilverGuard™ coating (pre-coated with an EPA registered antimicrobial) are available on special order.