DuraVent DIS1 Посібник - Сторінка 6
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Друкувати сторінкуFIRE RATED (2-HR) WALL PENETRATION
Fig. 8: Through a fire-rated Wall / requires 2 X DIS3ZØTPFK
Expected number of tubes of S-TPFS per hole Through
a 2 – Hr. Fire Rated Wall or Floor
Inner Duct Diameter
5
6
7
8
9
10
11
12
13
14
16
18
20
22
24
26
28
30
32
34
36
Table 4: required number of tubes S-TPFS
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CIXPRO SERIES FOR GREASE DUCT UL1978 SUBMITTAL RECORD
Number of Tube per hole
2 – ¼
2 – ½
2 – ¾
2 – ¾
3
3 – ¼
3 – ¼
3 – ½
3 – ¾
3 – ¾
4 – ¼
4 – ½
5
5 – ¼
5 – ½
6
6 – ¼
6 – ½
7
7 – ¼
7 – ¾
PROPER STORAGE
All chimney components should be stored in a dry place until
installed.
Sealant shall be stored in a location where it will not freeze.
PRODUCT WEIGHT DIS3Z
The average weight of the duct, per foot of length, can be
estimated using the following formula:
SYSTEM SIZING
The Grease Duct system sizing should be done by an
experienced person familiar with duct sizing. Not following the
equipment manufacturer's instructions may result in
inadequate duct performance and/or a violation of the
equipment manufacturer's installation requirements.
EXTERIOR CORROSION PROTECTION
It is recommended to apply an exterior grade high heat paint to
any plate support, full/half angle rings, wall supports/guides,
aluminized outer duct wall (Galvalume) corrosion protection
against the elements. Rust-Oleum V200 series High Heat
Industrial Aerosol is an example for proper protection of these
components.
THERMAL EXPANSION CALCULATIONS
Thermal expansion under normal operating temperatures can
fatigue welds and joints causing leakage. To calculate the
thermal expansion, use the following formula:
[Length (ft.) / 100] X [Temperature Rise Degrees F / 100]
Example: [50' / 100] X 75° / 100] = .375" Expansion
If the computed expansion between the fixed points is greater
than .375" DuraVent recommends an adjustable length be
installed.
SLOPE FOR GREASE DUCT
For DuraVent factory-built grease ducts listed to UL1978,
install at a duct slope not less than 1/16" unit vertical slope in
12 units of horizontal toward the hood or toward the grease
reservoir. When DuraVent grease duct listed to UL1978
exceed 75 feet in length, the slope shall not be less than 1/8"
unit vertical slope in 12 units horizontal. The minimum slope is
a result of tests and/or analysis performed by Underwriters
Laboratories, where factory-built grease duct was compared to
rectangular field-applied grease duct for performance of flow
characteristics. Consult with AHJ for acceptance of this
alternate method.
REV: 0
AUGUST 2017
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