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I. |
Description
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SPIRAmir®
is a patented product and represents a unique and convenient way of
joining spiral duct and fittings. SPIRAmir®
self-sealing spiral duct system uses O-Ring gasket. This gasket rotates
easily between two grooves placed on the SPIRAmir®
fittings. The first groove is the initial place of the O-Ring. When a
fitting is inserted into the spiral duct, the O-Ring gasket rotates and
moves from the first groove to the second. The rotation of the O-Ring
moves the pipe over the fitting.
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Specifications |
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SPIRAmir®
Self-Sealing Spiral Duct System has been tested by an accredited
testing laboratory in accordance with UL testing standards. The results
indicate that when testing in accordance with UL 723 and NFPA 255
standards, SPIRAmir®
Spiral Duct System produces a flame spread index of zero (0) and smoke
developed index of zero (0). |
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II. |
Materials
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Type
/ Standard |
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Galvanized: G90 in
accordance with ASTM A-653 and A-924. |
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Stainless Steel: 304/2B and
316/2B in accordance with ASTM A-240. |
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Aluminum: 3003-H14 in
accordance with ASTM B-209. |
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PVC Coated Steel: 4x1
Underground, 4x4 Aboveground, and 4x1 Reverse. |
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Gauges
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Gauges
are in accordance with SMACNA's medium pressure Duct Construction
Standards. Gauges for spiral duct and fittings are outlined in the
table below. |
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Diameter
(Inch)
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Spiral
Pipe (Ga.)
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Fitting
(Ga.)
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4-14
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26
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24
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16-26
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24
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22
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28-36
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22
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20
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38-48
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20
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20
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III. |
O-Ring
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SPIRAmir®
O-Ring is made from EPDM sponge rubber cord and is resistant to ozone,
sunlight, weathering, aging, temperature fluctuations (-40 F to
+212 F).
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IV. |
Construction
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Methods
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SPIRAmir®
Fittings are manufactured by using one or more of the
following construction methods: |
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Overlapped
and stitch welded along the entire length of the fitting. |
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Standing
seam gore locked. |
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Button
punched and internally sealed. |
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Spot
welded and internally sealed. |
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SPIRAmir®
Pipe is manufactured by using one or more of the following
construction methods: |
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Spiral
lock seam construction. |
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Rolled
construction continuously stitch welded along the entire length of the
pipe. |
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Pressure Class |
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SPIRAmir®
fittings far exceed SMACNA's medium pressure/high velocity requirements
(+10 in. WG). |
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V. |
Connection
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Method |
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Duct-to-duct connections
are made by using a pipe coupling. |
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Fitting-to-duct connections
are made by inserting fitting into the duct. |
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Fitting-to
fitting connections are made by using a fitting coupling. |
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Classification |
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SPIRAmir®
connections exceed SMACNA's leakage Class 3 requirements, per SMACNA's
Duct Design Manual from -20” W.G. to +12” W.G. |
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VI. |
Installation Instruction |
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1. |
Make sure the spiral pipe
or large end fitting is pushed all the way over and up to the bead of
the small end fitting. |
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2. |
Secure the slip connection
together by using 1/8" sheet metal screws or rivets. |
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3. |
Place the screws or rivets
1-1/2" from the edge of the pipe or the large end fitting to avoid
cutting into the O-ring gasket. |
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4. |
Insert the sheet metal
screws or rivets by using the sequence show below. |
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VII. |
Advantages
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vs.
Conventional |
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Lower field installation
costs. |
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How much: 30% to 40%
savings. |
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Why: Time savings due to
easier connections, no need for duct sealer or duct tape. |
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Contractors can handle more
projects, since each job takes less time to install. |
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Ideal for exposed spiral
projects. Jobs look clean without duct sealer and duct tape. |
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vs. Other Self-Sealing
Systems |
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SPIRAmir®
fittings can be used with any spiral duct manufacturer's pipe. Neither
the spiral duct machine nor the pipe needs to be calibrated. |
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SPIRAmir®
fittings are fitted with a removable O-ring gasket. |
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SPIRAmir®
fittings can be taken apart easily after connections have been made. |
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SPIRAmir®
fittings can be reused. New screw holes can be added without destroying
the integrity or clean look of the self-sealing system. |
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Flexible lead time to
accommodate projects and/or contractors needs. |
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In addition to standard
SPIRAmir® fittings, we
can easily make many non-standard fittings using the SPIRAmir®
Self Sealing System. Some examples include: Square to Round
transitions, reducing Tees (any angle), etc. Please contact us with
your special needs. |
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SPIRAmir®
fittings are made of PVC Coated Steel (4x1 & 4X4), Aluminum, in
addition to Galvanized and Stainless Steel.We also offer other than
standard gauges. |
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