4-BOLT CONNECTION SPECIFICATION

Description:

Elgen Flange & J Flange are premium 4-bolt connections. Elgen Manufacturing is customer oriented and understands that duct fabricators like to have a choice, which is why Elgen offers both flange configurations. Both 4-bolt connections exhibit the following features:

  1. Fast, easy Installation.
  2. No additional sealant required.
  3. Connections match up to most other manufacturers systems.
  4. All components are guaranteed against defective material.
  5. The flanges are precision roll-formed from 20 GA galvanized (min G-60) steel.
  6. Flanges have factory installed mastic making them almost totally leak-free.
  7. The flanges are comparable to the SMACNA Class “J” traverse joint connection.
  8. The systems are not recommended for applications with duct gauges heavier than 16 GA, or lighter than 26 GA. The J Flange is available in “wide pocket” for use with 12 GA to 16 GA.
  9. Both systems are available in Stainless Steel #304, Stainless Steel #316, Aluminum, Galvaneal (Paint-Grip), and PCD Coated (4mil on both sides).
  10. All components are manufactured to the highest standards using state-of-the-art machinery.

Installation Guidelines

  1. Cut flanges 1-1/4” shorter than ductwork.
  2. Cut with mastic pocket on top to avoid metal falling into mastic.
  3. Use a carbide tipped metal saw blade when possible. Other blades can heat up the flange and cause the mastic to melt.
  4. Assembly frame with corners and install on the ductwork. Use a rubber or wooden hammer to ensure the frame is properly installed and the ductwork completely penetrates the mastic. This ensures there will be no air leakage along the connection.
  5. The corner of the duct must protrude out past the corner piece.
  6. Fasten within ¾” of the end of each flange using screws. For flanges over 24” add a screw to the middle of the flange. For flanges over 48” add screws spaced no more than 24” apart.
  7. When connecting sections of ductwork together, use Elgen #440 Gasket (or Elgen Neoprene Gasket for breakaway connections) between sections.