kbb43-43.qxd 12/23/15
KBB43-43 DOUBLE
CENTRIFUGAL BLOWER
Dimensions, inches [mm], are for reference only and subject to change.
STANDARD FEATURES
PERFORMANCE GRAPHS
Airflow vs. static pressure curves are shown for 60
Hz and 50 Hz (broken line) inputs. Static pressure is
in inches of water.
ACCESSORIES
AND OPTIONS
Airflow Switch
Automatic Speed Control
Other voltages and frequencies
Special external paint finishes
Special line cord or connectors
Capacity: 450 CFM
Full performance in any mounting position
Rugged construction with baked powder finish
UL/CSA ball bearing motors
12-inch [304.8mm] (minimum) power and
ground leads
Accessories and options
DIMENSIONS inches [metric]
TECHNICAL DATA
*
Approximate
CFM @ Cutoff RPM Amps Weight
Model 0" S.P. S.P. Nominal Run. L.R. Watts Lbs. Kg.
KBB43-43 450 1.70 3200 2.5 5.4 260 13 5.9
* 115V, 60 Hz. operation
KBB43-43
2.0
1.0
STATIC PRESSURE
.2
25
0
125
250 375 500
AIRFLOW C.F.M.
11.70
[297.2]
3.44
[87.4]
4.00
[101.6]
4.38
[111.3]
3.88
[98.6]
3.25
[82.6]
(8) .218 [5.5]
DIA. HOLES
[117.6]
4.00
[101.6]
4.63
3.25
[82.6]
(OPENING)
3.50
[88.9]
7.25
[184.2]
4.31
[109.5]
7.63
[193.8]
8.25
[209.6]
(REF.)
10.69
[271.5]
DESCRIPTION
KOOLTRONIC Double Centrifugal Blowers are designed to provide greater airflow than the related single blower series, in the same types of low to
moderate static pressure applications. Similarly, they are easily installed and operate with equal effectiveness in any mounting orientation.
Eleven models comprise the series, offering a choice of sizes and capacities to satisfy a wide variety of cooling requirements. Together, single and double
centrifugal blowers are the backbone of forced convection air cooling.
These Double Centrifugal Blowers and the Quadruplex Centrifugal Blowers are the exclusive air movement components in virtually all KOOLTRONIC
Packaged Blowers, Heat Exchangers and Air Conditioners.
STANDARD FEATURES
RUGGED CONSTRUCTION: Precision-engineered heavy-gauge steel construction insures blowers stand up under tough applications.
BAKED POWDER FINISH: Durable, baked-on gray powder finish is standard. Other finishes are available.
PRECISION BALL-BEARING MOTORS: All motors, whether permanent split capacitor or shaded pole, are UL/CSA Recognized and include automatic-
reset thermal overload protection. Designed for low temperature rise, KOOLTRONIC motors are also cooled by the blowers' intake air, for maximum motor
life. All motors meet Federal Specification CC-M-1807A, and include double-sealed or double-shielded precision ball bearings, which meet Federal
Specification FF-B-171A. Special permanent lubricants perform over a broad temperature range: -20ºF (-28.9ºC) to 250ºF (121.1ºC). Consult KOOLTRONIC
for motors designed to meet military or extreme environmental specifications.
POWER: 115 VAC or 230 VAC, 50/60 Hz is standard. For multi-phase power, other voltages and frequencies or brushless DC applications, consult
KOOLTRONIC. NOTE: Some 230 Volt models may not be available or minimum purchases may apply. Contact Kooltronic for information.
LEADS: 12'' [304.8mm] (minimum) power and ground leads. Special lengths and/or plugs available.
ACCESSORIES AND OPTIONS*
AIRFLOW SWITCH: Protects equipment against damage caused by loss of cooling airflow by activating an alarm or turning off power. The switch can be
mounted on any suitable surface which allows the stainless steel air vane to be placed in the critical airstream. This switch is a single-pole double-throw
type, with normally open and normally closed contacts. To order integrated airflow switch add -XX10 to model number. To order as external accessory, see
Kooltronic website.
OTHER VOLTAGES AND FREQUENCIES
SPECIAL EXTERNAL PAINT FINISHES
SPECIAL LINE CORDS OR CONNECTORS
*
Contact KOOLTRONIC for information.
KOOLTRONIC also designs and manufactures a variety of Blowers to meet unique specifications. We invite your inquiries about our modification
and custom-design capabilities.
KBB43-43 DOUBLE
CENTRIFUGAL BLOWER
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