Duct Coupler- 4 Bolt Design with Seal
- Ready to use.
- Air and water tight.
- Rubber Seal Inside
- Cost effective and user friendly.
- Proper installation visibility.
Duct Couplers- 4 Bolt Design with Seal are a two-piece split design held together by 4 stainless steel bolts.
They connect two ends of inner duct while sealing the joint against air leakage during a cable-air installation. The coupler is reusable or can be installed as a permanent connection. The coupler can easily be installed by one person with the DH-10 Duct Holder Tool and available in a variety of sizes.
Size: 3 1/4″ x 4″ x 3 1/2″ installed
Material: Corrosion-resistant aluminum
Weight: 1-1/2 lbs.
Bolts: 4 each stainless steel- 5/16-18NC x 1 1/4″ long
Tension Requirement: Annular pointed ridges on the inside of the coupler cause an interference fit with the outside of the duct creating a joint that takes a minimum of 4,000 lbs. to pull apart.
Air Sealing Requirement: 1/4″ thick x 3/4″ wide adhesive backed foam tape at the joint will exceed the requirement of a cable-air duct run: no more than a 20 psi drop in pressure in two minutes starting from a sealed pressure 100-130 psi.
Special Requirement: The coupler can be machined to connect two ducts of different outside diameters allowing for transition from one pipe size to another.
DC-10-1.66: SDR11, 1 ¼” I.D. S.Wall