About SPIRAmir®
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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
(-40¼ F to +212¼ 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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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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