Double Wall Duct Connector

Objective:

[0038]To compare the leakage of a SPIRALMATE® connection with inner ring (attached with BNGASKET) to a standard SPIRALMATE® connection (without inner ring) to determine if BNGASKET is an acceptable attachment method. This will be achieved over several tests required.

Overview:

[0039]All tests will be done with a two connection system per SMACNA requirements. The tests performed will be leakage trials for Standard SPIRALMATE® connection and Standard SPIRALMATE® connection with inner ring connected with double-sided tape / gasket. This will be trialed for both small and large profile SPIRALMATE® connections.

Materials & Instrumentation:

[0040]The following material and instrumentation were used:[0041](3×) 10″ Dia×2′ Long, round spiral pipe[0042](3×) 40″ Dia×2′ Long, round spiral pipe[0043]Cadillac Products blower unit, Model: HP33P[0044]Meriam laminar flow element, Model: 50MC2-2, Range: 0-20 psi[0045]Extech Differential Pressure Manometer, Model: HD700, Range: 0-2 psi[0046]Retrote

Objective:

[0065]There are two primary objectives to this series of tests. First is to compare the leakage of a SPIRALMATE® connection with centered inner rings (attached with ½″ PSA Tape) using double-wall duct to a similar connection with non-centered inner rings. Second is to compare the leakage of a SPIRALMATE® connection using double-wall duct where flange and inner ring splices are misaligned vs. aligned.

Overview:

[0066]All tests will be done with a one-connection system. The tests performed will be leakage trials for a standard SPIRALMATE® connection with inner rings attached (concentric vs. non-concentric & aligned vs. misaligned splices) using ½″ double-sided tape / gasket. Only large profile SPIRALMATE® connections will be used, due to the diameter of duct being tested. The application of the inner rings on large diameter double-wall duct will also be trialed for determining difficulty.

Materials & Instrumentation:

[0067]The following material and instrumentation were used:[0068]