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Dayton 20 inch transformer cooling fan with steel guard and aluminum blades

Dayton

Dayton 13F051 Transformer Fan 20 in 4600 cfm 115/230V

SKU CH-NTC9-KTGD9

20-inch guard-mount transformer fan delivers 4600 cfm airflow at 115/230V with a 15 ft cord

  • High airflow of 4600 cfm cools large transformer areas efficiently
  • Dual 115/230V AC input suits varied industrial power supplies
  • 20 inch aluminum blades with four-blade design move air at 1140 rpm
  • Totally enclosed air-over motor with ball bearings runs in 104°F ambient
  • 15 ft cord and guard-mount frame simplify placement on 17 3/4 in centres

Transformer Cooling Fan 20 in 4600 cfm

The Dayton 13F051 is a guard-mount transformer cooling fan built for industrial HVAC applications. It moves 4600 cfm through a 20 in aluminum blade at 1140 RPM on single-phase 115/230V AC power. The totally enclosed air-over motor is rated at 1/4 hp with Class B insulation and ball bearings for continuous duty.

Upgrade From Lower-CFM Guard Fans

This unit replaces smaller guard-mount fans that cannot meet the 4600 cfm requirement at 1140 RPM. The jump is worth it when the existing installation cannot dissipate transformer heat at the 104 Degrees F maximum ambient temperature. The 15 ft cord and 17 3/4 in mounting eye spacing fit the same guard-mount footprint without structural changes.

Sustained Load Behaviour

Under continuous operation the 1/4 hp motor draws 3.1 A at 115V or 1.5 A at 230V while maintaining 1140 RPM and rated airflow. The totally enclosed air-over enclosure and ball bearings are designed for steady-state heat rejection at up to 104 Degrees F ambient without thermal derating. The steel guard and aluminum blades resist fatigue during prolonged vibration.

How it compares

Measured against everything we stock in Industrial, Drum & Tower Cooling Fans, at today’s prices. Recalculated every night.

Price $779.99
Pricier than about 90% of the 304 comparable items (median $325.49).

Specifications

Product
Brand nameDAYTON

Questions about this item

What are the overall dimensions and mounting-eye spacing for fitting this 20-inch transformer fan?

The fan measures 23 inches high by 23 inches wide by 13 5/16 inches deep, with mounting eyes on 17 3/4-inch centres.

How is the unit wired for 115 V or 230 V operation and what common step is missed?

The motor is dual-voltage; follow the wiring diagram on the nameplate to set 115 V (3.1 A) or 230 V (1.5 A), and remember to move the internal jumpers accordingly.

When should the ball bearings be inspected or the fan replaced given the 104 °F max ambient rating?

Inspect the sealed ball bearings annually; replace the fan if vibration, noise, or airflow drops below the rated 4,600 cfm at 1,140 RPM.

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