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Building Vault Fan

BVF18E115B
Building Vault Fans are delivered completely assembled, including a 2-speed switch, adjustable thermostat and 4 foot cord with grounded plug.
  • Fan bodies constructed of 14 gage welded steel, powder coated for durability. Venturi is mill galvanized.
  • Motors are 1/4 HP, 115 V, single phase, drip proof construction, two-speed. Single speed and other voltages are available.
  • Zinc-plated fan guard.
  • Building Vault Fan, as shown, blows air into the vault to provide positive pressure. A reverse configuration is available to exhaust air from the vault, providing negative pressure.
Fans are used for forced ventilation in transformer vaults to remove transformer heat loss. Fans are selected based on transformer size and transformer efficiency. Heat loss through the walls and floor is usually about 10 to 20% of the transformer heat loss.

The "FAN SELECTION TABLE" is based on the normal heat loss from the transformer. The table is based on the transformer losing 1 1/2% of its capacity into heat. The air volume for a transformer rating is selected on the air temperature leaving the vault at 25 degrees F above the entering air temperature.

Fan Selection Table
Model Fan
Size
HP
RPM
Wall Opening
Maximum Transformer
CFM
Sound Level*
dB(A)
BVF12E115B
12
1/4
1725
1160
18 X 18
750 kVA
560 kVA
1200
890
62
52
BVF18E115B
18
1/4
1140
850
24 X 24
1400 kVA
1100 kVA
2200
1650
66
57
BVF24E115B
24
1/4
1140
850
30 X 30
2000 kVA
1500 kVA
3100
2300
70
61
*Sound levels taken at 10' from fan outside of vault.

Overall and Mounting Dimensions

Model Fan
Size
Wall
Opening
A
B
C
D
BVF12E115B
12
18 X 18
12
16¼
14
26¼
BVF18E115B
18
24 X 24
15
22¼
16
32¼
BVF24E115B
24
30 X 30
19
28¼
16
40
* Test Method: AMCA 210-99, fig. 12/ ISO 5801, fig. 71b, fan installation type A, free inlet and free outlet. Other impeller arrangements will affect the performance.
** Sound levels listed here were determined under laboratory conditions. Many factors can influence fan sound levels that are beyond the control of the propeller manufacturer or California Turbo, Inc; including inlet geometry and obstructions in the airflow. Please use this information for comparison purposes only.
NOTE: Electrical and noise data are supplied by the motor and propeller manufacturers, respectively. These values have not been independently verified by California Turbo, Inc.
California Turbo, Inc. reserves the right to make product changes from time to time, without prior notification.

10721 Business Drive, Fontana, CA 92337 USA
Phone: 909-854-2800 or 800-448-1446
Fax: 909-854-2801
E-mail: websales@californiaturbo.com
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