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| Construction |
| The strength of RigiDuct® is derived from criss-cross
spiral rovings of fiberglass. RigiDuct® has more strength than non-filament
wound fiberglass or PVC duct; yet, the tubing is as light as any
other plastic duct and much lighter than metal duct.
The inert qualities of the fiberglass combine with the tough resins
to make RigiDuct® highly resistant to attack from acid or alkaline
conditions. RigiDuct® complies with all applicable U.S. Mine Safety
and Health Administration (MSHA) regulations and requirements. |
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| Shapes |
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Round RigiDuct® is normally used in standard
mine or tunnel operations. Oval RigiDuct® is offered for areas
that have limited head room.
Round and Oval RigiDuct® are furnished in standard 10 foot
(3m) lengths. Round RigiDuct® can also be furnished in 20
foot (6m) long sections. |
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| Suspension |
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All sections come supplied with strong flat
metal straps and metal D-rings at each end. These straps,
an integral part of the tubing, can be used to lock sections
together or utilized for suspension purposes in a mine or
tunnel application.
When ordering Oval RigiDuct®, you must specify whether it
will be hung vertically (flat side to rib or shaft wall) or
horizontally (flat to the roof or top). This specification
allows for proper placement of suspension loops and correct
manufacture of the accessories. |
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| Couplings |
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RigiDuct® is supplied with standard tapered
bell and spigot couplings, designed to minimize coupling air
loss. This coupling has fiberglass fabric reinforced ends
to reduce breaking or fraying as the tubing is handled. The
bell end is color-coded for easy identification underground.
Single gaskets are available to minimize coupling air loss.
For high pressure applications, double gaskets are recommended.
Single or double gaskets are offered as an option for all
sizes of RigiDuct®. |
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| Sizes |
| Standard Duty (SD) ROUND
RigiDuct® is available in the following sizes: (Inside Dimensions) |
| 08"
(205mm) |
18" (460mm) |
28"
(710mm) |
48" (1,220mm) |
| 10" (255mm) |
20" (510mm) |
30" (760mm) |
54" (1,370mm) |
| 12" (305mm) |
22" (560mm) |
36"
(915mm) |
60" (1,525mm) |
| 14" (355mm) |
24" (610mm) |
40" (1,015mm) |
72" (1,830mm) |
| 16" (405mm) |
26" (660mm) |
42"
(1,070mm) |
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| Standard Duty (SD) OVAL
RigiDuct® is available in the following diameters: |
| 14" (355mm) |
22" (560mm) |
42" (1,070mm) |
| 16" (405mm) |
24" (610mm) |
45" (1,145mm) |
| 18" (460mm) |
30" (760mm)
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| 21" (535mm) |
36" (915mm) |
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| NOTES: Extended
Duty (XD) Round RigiDuct® is available in 24" diameter and
larger sizes. Extended Duty (XD) Oval RigiDuct® is available
in 21" and larger sizes. |
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| RigiDuct®
Accessories |
| Fittings includes 22˝-, 30-, 45-, 60- and 90-degree
Elbows, Flexible and Smooth Radius Elbows, End Caps, T’s, Y’s
and Lateral Y’s. Reducers and Transition Pieces, (Figure 1)
for connecting different shapes and sizes of RigiDuct®, are
also available. When ordering T’s, Y’s, Reducers and Lateral
Y’s, be sure to indicate the bell and spigot locations. See
photo below, labeled (Figure 2), showing how vertical and horizontal
elbows are manufactured.
We also offer extensible Face Tubes, which slide forward
manually to keep the duct within 10 feet (3m) of the face.
Face Tubes are furnished as the next available size smaller
than the tubing line diameter.
In addition to the standard line of Fittings, we can customize
your installation by offering special items such as short
lengths of RigiDuct® or Smooth-Radius Fittings. Sections with
mixed couplings are available to adapt RigiDuct® to MineDuct®
exhaust tubing or MineVent® blower tubing. we can also tailor
your tubing or fittings by installing customized dampers to
meet your specifications. |
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| RigiDuct®
Round to Oval Conversion Chart |
Equivalent
Round Diameters for Oval RigiDuct® |
| RigiDuct®
Size for Specifying |
Spigot End
NOTE: Add
1" to dimensions to determine
bell end measurements
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Equivalent
Round Diameter (I.D.) |
| A |
B |
| inches |
mm |
inches |
cm |
inches |
cm |
inches |
mm |
| 14 |
355 |
17.125 |
44 |
09.125 |
23 |
12.500 |
320 |
| 16 |
405 |
19.750 |
50 |
10.875 |
28 |
15.125 |
385 |
| 18 |
460 |
22.500 |
57 |
11.125 |
28 |
16.500 |
420 |
| 20 |
510 |
26.500 |
67 |
12.000 |
31 |
19.125 |
490 |
| 22 |
560 |
28.750 |
73 |
14.250 |
36 |
21.125 |
540 |
| 24 |
610 |
30.000 |
76 |
16.000 |
41 |
22.500 |
570 |
| 30 |
760 |
36.500 |
93 |
20.500 |
52 |
28.100 |
715 |
| 36 |
915 |
43.000 |
109 |
26.000 |
66 |
34.375 |
875 |
| 42 |
1,070 |
51.000 |
130 |
28.000 |
71 |
39.250 |
1,000 |
| 45 |
1,145 |
54.000 |
137 |
32.500 |
83 |
43.125 |
1,095 |
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