"The TPI tubeaxial direct drive fan is custom-built and features an explosion proof motor. Explosion Proof motors are Class 1, Div 1, Group D and Class 2, Div 1, Groups F & G. U.S.A. Fans are made to order and are non-returnable unless there is a warranty/quality issue contact your Northern Tool representative toll-free @ 1-800-221-0516. Volts 230, Dimensions L x W x H in. 48 x 51 x 50, Air Delivery CFM 28,600, Fan Diameter in. 48, Speed RPM 1,140, HP 3. 3 Phase, 3 HP Explosion Proof motor is field convertible 230V/460V Motors are set to lower voltage 230V at the factory unless a request is made at time of order to set them to the higher voltage 460V 1140 RPM 4 blades 14 gauge steel drum including mounting flanges Fan can be mounted to operate in any position Rugged cast aluminum blade Non-sparking Housing Inner Dim. 48in. Housing Outer Dim. 51in. Housing Depth 18in. Bolt Hole Centers 49 5/8in."
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