DWGD-RZ

DWGD-RZ UL-2221 Zero Clearance & Fire Resistive Rectangular Grease Duct

System features

Specifications

Description

Zero Clearance and fire rated Grease Duct:
Provides 2-hour fire resistive shaft and zero clearance duct in a rectangular assembly.

Inner Material

Stainless Steel

Outer Jacket Material

Choices of stainless steel or aluminized steel

Insulation

3'' of ceramic fiber insulation

Wall thickness

Inner liner made of 0.035" stainless steel

- Dimensions of all sides totaling 24” or less = 0.025” thick

- Dimensions of all sides totaling 26” or more = 0.035” thick

Sizes

Model DWGD-RZ Grease Duct is available in either square or rectangular configurations. The maximum allowable width to
height ratio is 6 to 1, for instance 36” x 6”.
Square duct is available in sizes from 6” x 6” to 36” x 36”. Rectangular duct is available in sizes from 6” x 8” to 27” x 48”.

Connection

Inner connection is a flange-to-flange bolted connection
Supplied sealant is used on the flange to create a seal
Blanket insulation and outer band complete the joint assembly
Rectangular grease duct must be installed with a slope of 1/8” per foot of horizontal run if the length of the run is 75’ or less. If the length of the horizontal run exceeds 75’, it must be installed at a slope of ½”

Literature

Main features

Extremely rigid inner is made of all-stainless steel with Limited Ten Year Warranty.
Liquid tight joints.
Smooth flow and known resistance for accurate factory pressure calculations.
Zero clearance and 2-hour fire resistive so it eliminates the requirements for an additional fire rated shaft.
Factory-built eliminates welding in the field.
Factory-insulated allows for single trade installation.
Rectangular configuration allows for alternative use of space in certain restrictive conditions.
May be intermixed with Jeremias round Models (GD, FL, or CK) or rectangular Model SWGD-R.