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Mega Direct Drive
Product Description:
J&D's NEW 72" Mega Direct Drive fiberglass exhaust fan boasts some of the best performance on the market today for a fan of this size! 55,505 CFM at 0.10" static pressure plus no belts, no pulleys, no tensioners. An amazing fan available only at J&D. The fan is variable speed ready with the driver mounted inside the fan. The 5-blade poly prop is optimally pitched for superior performance, and comes with a 3 year warranty! The motor is a permanent magnet direct drive, IP66-rated motor that comes with a 2 year warranty. Contact J&D today and let us help you design the perfect dairy ventilation system for your herd.INTERESTED IN THIS PRODUCT?
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Find a Dealer Email PageKey Features:
- Save Time & Money
- No Belts to Change
- No Pulleys to Maintain
- No Lubricating Bearings
- No Greasing Motor
- Maintains a continuous high level of performance with no power loss or reduction from aging belts and pulleys
- FANtastic performance combined with great efficiency
- Soft starts fan to reduce loads on fan during start up and helps to extend fan life
- UV-resistant fiberglass housing and cone with smooth molded exterior
- Smooth exterior for easy cleaning
Applications:
- Dairy
- Greenhouse
- Industrial
- Poultry
Product Details:
72"
4 kW
460
6.15
60
3
1/Var^
450
PM-DD
5-Ply
20221012-01
Y
Included
Fixed
59,594
18.2
57,603
16.7
55,505
15.3
53,460
14.1
51,268
13.1
0.89
77” W x 77”H
Aluminum
one-piece
Fiberglass
White
Hot dip galvanized
Silver
Poly
Black
Accessories:
| Part # | Details |
|---|---|
| Shutter Motor Kit | |
| VRS75 | Shutter Motor Kit, for 75" Shutters, w/Hardware |
| VRS75-C | Shutter Motor Kit, for 75" Shutters, w/Hardware and 10' Cord |
FAQs:
J&D tested multiple motors to be considered for the Mega Direct Drive Fan, and we chose the one that was the toughest, and it just happened to be a permanent magnet motor. It has very good performance and efficiency, especially in this application. This motor was vigorously tested in this fan to the point we were trying to make it fail. No matter what we did, we couldn't get the motor windings hot. Winding temperature is the biggest factor in predicting motor lifespan. No matter what we did, we couldn't get the windings to heat up even close to what was allowed.
Switch reluctance motors are good motors, however, we find them to be too loud for our application. The reason they are loud is switch reluctance motors rotate in consecutive 'steps'. The steps are fast so the shaft rotates, but this makes them louder. You can make switch reluctance motors quieter with algorithm changes that smooths the steps, but making that change also cuts the performance and efficiency, and they're still louder than a permanent magnet or induction motor.
Switch reluctance motors are good motors, however, we find them to be too loud for our application. The reason they are loud is switch reluctance motors rotate in consecutive 'steps'. The steps are fast so the shaft rotates, but this makes them louder. You can make switch reluctance motors quieter with algorithm changes that smooths the steps, but making that change also cuts the performance and efficiency, and they're still louder than a permanent magnet or induction motor.