Triple Lock Metal Duct

TL-B


Aluminum

TL-M


Aluminum

NI-TL


Aluminum

SS-NI-TL


Stainless Steel

Insulated Insulated Non-Insulated Non-Insulated
Pressure Rated Pressure Rated Pressure Rated Pressure Rated

10" w.g. positive thru 16" dia.
6" w.g. positive 18" dia.
12" w.g. negative thru 16" dia.
4" w.g. negative 18" dia.

10" w.g. positive thru 16" dia.
6" w.g. positive 18" dia.
12" w.g. negative thru 16" dia.
4" w.g. negative 18" dia.

10" w.g. positive thru 16" dia.
6" w.g. positive 18" dia.
12" w.g. negative thru 16" dia.
4" w.g. negative 18" dia.

12" w.g. positive (all dia.)
12" w.g. negative (all dia.)

Thermal Resistance: Thermal Resistance:   
 R-4.2, R-6.0, R-8.0 R-4.2, R-6.0, R-8.0
Vapor Barrier Permeance: Vapor Barrier Permeance:
.10 Perm A.S.T.M.
E96-66, Procedure A
.05 Perm A.S.T.M.
E96-66, Procedure A

 

Triple Lock

Flexmaster Triple Lock product is an all metal flexible duct that is constructed entirely without the use of adhesives.  The Triple Lock Mechanical joint makes an air-tight seam, while the circumferential corrugations provide excellent strength and flexibility

Minimum bend radius to center line is one diameter.  However, our recommended radius is 1.5 diameters in accordance with accepted practice.  Triple Lock stainless steel ducting may be easily cut to size and hand-formed into offsets or elbows to suit job conditions without subsequent sagging or droop.

Triple Lock has much lower pressure loss than conventional cloth ducts due to the small but consistent corrugations that provide both strength and flexibility.

ETL Class Rated
UL 181 vs. ETL

Nationally Recognized Test Laboratories:
http://www.osha.gov/dts/otpca/nrtl

Installation Instructions