Exhaust Stacks.pdf

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High Plume Exhaust Stack Unit Plume Exhaust Nozzle wheel velocity Stack mounts stainless steel scroll type housing PolyStack Exhaust Stack PolyStack air flow CFM mounts Motor inline centrifugal fan High velocity Stack Exhaust Stack System direct driven Unit Arrangement

Bulletin 113
October, 2002
PolyStack High Plume
Exhaust Stack System
PolyStack Features
Features
• Sizes: Available in 10" to 36" wheel sizes.
Consult factory for larger units.
• Construction: Fiberglass, Hetron 99P
polyester resin construction with antimony
trioxide for a Class 1 flame spread of 25 or
less.
• Color: Gray, standard. For other colors
consult the factory.
• Motor Arrangement: Available in either
direct drive or belt driven arrangements.
Direct driven units have the motor isolated
from air stream.  Belt driven units have a
high velocity stack mounted on the outlet of
either a scroll type housing or an inline fan.
Scroll type housings are available with
motor arrangements 1,9, or 10.  Motor
cover standard on arrangement 10 fans.
• Hardware: 304 stainless steel.
• Wheel: Backwardly curved wheel for non-
overloading performance and quiet
operation. Self-cleaning radial wheels or
mixed flow wheels are available.
• Shaft: 316 SS or encapsulated steel with
shaft seal.
• Mounting:  Direct Driven units include cap
for mounting on plenum boxes or roof
curbs.
• Scroll units have slip fit inlets standard,
flanged style available.
• Stormband mounted on adjustable
mounts to control amount of secondary
dilution air.
Options
• High velocity stack mounted on inline
centrifugal fan for special applications.
• Special resins are available for specific
corrosive applications.
• Spark resistant construction with carbon
impregnation for static grounding with
static grounding lugs.
• Surface veil applied to airstream
surfaces to increase corrosion
resistance.
• Hardware: 316 stainless steel, for other
types consult factory.
• Shaft: 304 or 316 stainless steel.
• Complete line of fiberglass accessories
is available: Fiberglass duct work, inlet
plenums, and dampers for flow control.
• Disconnect Switches, Vibration Isolators,
access doors.
• Special units for low flow rates.
Polymil Products, Inc. high velocity exhaust
stacks are ideally suited to exhausting
contaminants from ventilation systems
where corrosion is also a concern.
PolyStack exhaust stacks are used for
dispersion of fumes, preventing these fumes
from re-entering buildings.  Available
accessories include inlet plenums, ducts,
and control dampers for use with the
PolyStack exhaust stack system.  Plume
heights equivalent to conventional stacks
can be achieved with lower profiles.
ARRANGEMENTS
Belt Drive Backward Inclined Fan
with High Plume Exhaust Nozzle
Belt Drive Inline Centrifugal Fan with High
Plume Exhaust Nozzle and Mixing Box
Direct Drive PolyStack with easily removed stack for
access to motor and wheel.  Motor compartment sealed
with o-rings.
Selection Table
PolyStack Performance
Unit Size
Minimum Air Flow (CFM)
Maximum Air Flow (CFM)
10
1065
2112
12
1535
4223
15
2381
6582
18
3420
9477
22
5150
14218
24
6130
16892
27
7780
21289
30
9630
26324
33
11670
31955
36
13790
37967
Corrosion Resistant Air Handling Products
51 North St. / P.O. Box 125
Phone (585) 768-8170
Le Roy, NY 14482
Fax (585) 768-7830
Visit our website: www.polymil.com or email us at sales@polymil.com
Effective stack heights are based on nozzle diameter and can be adjusted to
match your criteria.  Call with requirements and we can adjust to suit your
specifications.