Page 1
Sample Specifications - ULD
Upblast Roof Ventilator
Furnish and install as indicated on the plans PennBarry, Model
ULD, Direct Drive, Low Silhouette-Upblast Roof Ventilator(s),
complete with motor(s) and other accessories as described
below. The fan(s) shall be of heavy duty construction, designed
and suitable for continuous industrial use.
The fan housing shall be fabricated of heavy gauge sheet steel
spun to form a smooth air inlet and welded to a structural plate
motor mount. For a weatherproof installation the housing shall
have overlapping joints and a curb cap extended down over
the roof curb a minimum of 3". The fan discharge shall be of an
up-blast design with an extended throat beyond the propeller
and two (2) discharge dampers which shall open automatically
from the airstream pressure and close automatically from the
gravity of the damper blades. The damper blades shall be
galvanized steel with a weatherproof overlapping formed edgeseal and shall each have a continuous full length 1/2" diameter
axle for structural support of the damper blade. Each axle shall
be welded to its damper blade and shall turn in bronze oilite
bushings at both ends. The dampers shall be surrounded by
a circular galvanized windband to shield the dampers from
wind and allow them to close when the fan is shut off. All mild
steel surfaces not galvanized shall be prepared for painting by
means of a hot iron-phosphate wash and rinse. The prepared
surfaces shall be coated with an air dry enamel paint. Finish
coat shall be field applied by others to match building trim color.
Galvanized surfaces are to be supplied uncoated.
The fan propeller shall be of cast aluminum or fabricated steel
airfoil design. The propeller shall be statically and dynamically
balanced to commercially accepted standards.
The fan motor shall be of a NEMA foot mounted design,
suitable for continuous duty, and of the horsepower, speed
and enclosure type (open) (totally-enclosed) (explosion-proof
Class ________. Group ________,) listed in the fan schedule.
The motor shall be suitable for operation on the power supply
listed in the fan schedule for phase, cycles and voltage.
The fan accessories shall include: ____________________
________________________________________________
________________________________________________
The fan, motor, and accessory combination shall be as
manufactured by PennBarry of Richardson, Texas. The fan
shall be test run at the factory, and shall deliver the required
airflow CFM when installed and operating against a system
static pressure resistance as stated in the fan schedule.
32
PENNBARRY
Page 2
ULB - Sample Specifications
Upblast Roof Ventilator
Furnish and install as indicated on the plans PennBarry, Model
ULB, Belt Drive, Low Silhouette-Upblast Roof Ventilator(s),
complete with belt drive(s) motor(s) and other accessories as
described below. The fan(s) shall be of heavy duty construction,
designed and suitable for continuous industrial use.
The fan housing shall be fabricated of heavy gauge sheet
steel spun to form a smooth air inlet and welded to a structural
bearing mounting plate and motor mounting plate assembly.
For a weatherproof installation the housing shall have
overlapping joints and a curb cap extended down over the roof
curb a minimum of 3". The fan discharge shall be of an up-blast
design with an extended throat beyond the propeller and two
(2) discharge dampers which shall open automatically from the
airstream pressure and close automatically from the gravity of
the damper blades. The damper blades shall be galvanized
steel with a weatherproof overlapping formed edge-seal and
shall each have a continuous full length 1/2" diameter axle
for structural support of the damper blade. Each axle shall
be welded to its damper blade and shall turn in bronze oilite
bushings at both ends. The dampers shall be surrounded by
a circular galvanized windband to shield the dampers from
wind and allow them to close when the fan is shut off. All mild
steel surfaces not galvanized shall be prepared for painting by
means of a hot iron-phosphate wash and rinse. The prepared
surfaces shall be coated with an air dry enamel paint. Finish
coat shall be field applied by others to match building trim color.
Galvanized surfaces are to be supplied uncoated.
The belt drive shall have a drive service factor of 1.5. All drive
sheaves shall be of cast or malleable iron, accurately machined
and balanced. The drive belt tension shall be easily maintained
by adjusting the motor position via slotted motor mounting
holes on smaller motors and via the motors and via the motor
slide base on motor frame sizes 215 and larger. The fan belts
shall be removable without any disassembly of the unit.
The fan bearings shall be self-aligning 200 series ball bearing
pillow-block units. The bearings shall be equipped with
pressure relieving neoprene seals. The fan bearings shall
have a minimum L10 bearing life of 35,000 hours (average
life equals five times L10 life). The fan shaft shall be of mild
steel turned, ground and polished to standard commercial
tolerances and
the bearing manufacturer for rated bearing life.
The fan propeller shall be of cast aluminum or fabricated steel
airfoil design. The propeller shall be statically and dynamically
balanced to commercially accepted standards.
The fan motor shall be of a NEMA foot mounted design,
suitable for continuous duty, and of the horsepower, speed
and enclosure type (open) (totally-enclosed) (explosion-proof
Class ________. Group ________,) listed in the fan schedule.
The motor shall be suitable for operation on the power supply
listed in the fan schedule for phase, cycles and voltage.
The fan accessories shall include: ____________________
________________________________________________
________________________________________________
The fan, motor, and accessory combination shall be as
manufactured by PennBarry of Richardson, Texas. The fan
shall be test run at the factory, and shall deliver the required
airflow CFM when installed and operating against a system
static pressure resistance as stated in the fan schedule.
compatible with the tolerances suggested by
PENNBARRY
33
Page 3
Sample Specifications - UTD
Upblast Roof Ventilator
Furnish and install as indicated on the plans PennBarry, Model
UTD, Direct Drive, Upblast Roof Ventilator(s), complete with
motor(s) and other accessories as described below. The fan(s)
shall be of heavy duty construction, designed and suitable for
continuous industrial use.
The fan housing shall be fabricated of heavy gauge sheet steel
accurately rolled, continuously welded at the seam and bolted to
the curb cap. A structural plate motor mount shall be accurately
positioned in the housing and welded to the housing. For a
weatherproof installation the housing shall have continuously
welded joints and the curb cap shall extend down over the
roof curb a minimum of 3". The fan discharge shall be of an
up-blast design with an extended throat beyond the propeller
and two (2) discharge dampers which shall open automatically
from the airstream pressure and close automatically by gravity
of the damper blades. The damper blades shall be galvanized
steel with a weatherproof overlapping formed edge-seal and
shall each have a continuous full length 1/2" diameter axle
for structural support of the damper blade. Each axle shall
be welded to its damper blade and shall turn in bronze oilite
bushings at both ends. The dampers shall be surrounded by
a circular galvanized windband to shield the dampers from
wind and allow them to close when the fan is shut off. All mild
steel surfaces not galvanized shall be prepared for painting by
means of a hot iron-phosphate wash and rinse. The prepared
surfaces shall be coated with an air dry enamel paint. Finish
coat shall be field applied by others to match building trim color.
Galvanized surfaces are to be supplied uncoated.
The fan propeller shall be of cast aluminum or fabricated steel
airfoil design. The propeller shall be statically and dynamically
balanced to commercially accepted standards.
The fan motor shall be of a NEMA foot mounted design,
suitable for continuous duty, and of the horsepower, speed
and enclosure type (open) (totally-enclosed) (explosion-proof
Class ________. Group ________,) listed in the fan schedule.
The motor shall be suitable for operation on the power supply
listed in the fan schedule for phase, cycles and voltage.
The fan accessories shall include: ____________________
________________________________________________
________________________________________________
The fan, motor, and accessory combination shall be as
manufactured by PennBarry of Richardson, Texas. The fan
shall be test run at the factory, and shall deliver the required
airflow CFM when installed and operating against a system
static pressure resistance as stated in the fan schedule.
34
PENNBARRY
Page 4
UTB - Sample Specifications
Upblast Roof Ventilator
Furnish and install as indicated on the plans PennBarry, Model
UTB, Belt Drive, Upblast Roof Ventilator(s), complete with belt
drive(s) motor(s) and other accessories as described below.
The fan(s) shall be of heavy duty construction, designed and
suitable for continuous industrial use.
The fan housing shall be fabricated of heavy gauge steel
accurately rolled, continuously welded at the seams and bolted
to the curb cap. For a weatherproof installation the housing
shall have overlapping joints and a curb cap extended down
over the roof curb a minimum of 3". The fan shall have an
inner tube section, fully welded protecting the shaft, bearings
and drive components from direct air stream exposure. The
inner tube assembly shall have removable end covers to
allow for access to the bearings and drive assembly. The fan
discharge shall be of an up-blast design with an extended
throat beyond the propeller and two (2) discharge dampers
which shall open automatically from the from the gravity of
the damper blades. The damper blades shall be galvanized
steel with a weatherproof overlapping formed edge-seal and
shall each have a continuous full length 1/2" diameter axle
for structural support of the damper blade. Each axle shall
be welded to its damper blade and shall turn in bronze oilite
bushings at both ends. The dampers shall be surrounded by
a circular galvanized windband to shield the dampers from
wind and allow them to close when the fan is shut off. All mild
steel surfaces not galvanized shall be prepared for painting by
means of a hot iron-phosphate wash and rinse. The prepared
surfaces shall be coated with an air dry enamel paint. Finish
coat shall be field applied by others to match building trim color.
Galvanized surfaces are to be supplied uncoated.
The fan bearings shall be self-aligning 200 series ball bearing
pillow-block units. The bearings shall be equipped with
pressure relieving neoprene seals. The fan bearings shall
have a minimum L10 bearing life of 35,000 hours (average
life equals five times L10 life). The fan shaft shall be of mild
steel turned, ground and polished to standard commercial
tolerances and
the bearing manufacturer for rated bearing life.
The fan propeller shall be of cast aluminum or fabricated steel
airfoil design. The propeller shall be statically and dynamically
balanced to commercially accepted standards.
The fan motor shall be of a NEMA foot mounted design,
suitable for continuous duty, and of the horsepower, speed
and enclosure type (open) (totally-enclosed) (explosion-proof
Class ________. Group ________,) listed in the fan schedule.
The motor shall be suitable for operation on the power supply
listed in the fan schedule for phase, cycles and voltage.
The fan accessories shall include: ____________________
________________________________________________
________________________________________________
The fan, motor, and accessory combination shall be as
manufactured by PennBarry of Richardson, Texas. The fan
shall be test run at the factory, and shall deliver the required
airflow CFM when installed and operating against a system
static pressure resistance as stated in the fan schedule.
compatible with the tolerances suggested by
Motor is mounted externally on the fan casing and is not
exposed to the air stream. The fan's motor support and
mounting structure shall be fabricated of heavy gauge steel
plate and provide a means for belt tension adjustment. The
belt drive shall have a drive service factor of 1.5. All drive
sheaves shall be of cast or malleable iron, accurately machined
and balanced. The fan belts shall be removable without any
disassembly of the unit.
PENNBARRY
35
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