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NJF Series Aluminum Alloy Fan

NJF Series Aluminum Alloy Fan

NJF series aluminum alloy hollow type cooling tower fans are designed specifically for cooling tower, offering distinct advantages over other types of fans. The fan delivers maximum air flow and pressure capability at reduced speed. Fan diameter is available from 1500 to 6000mm.


NJF series aluminum alloy hollow type cooling tower fans are designed specifically for cooling tower, offering distinct advantages over other types of fans. The blade enhanced for low sound operation, delivers maximum air flow and pressure capability at reduced speed. The skin of NJF fan is made with high quality aliminum alloy that is infused with pigment for even distribution across the laminate. Blades connects to the fan hub using a heavy-galvanized iron ring integrally molded with each fan blade. By loosening the hub attachment hardware, blades can easily be rotated to achieve desired pitch, permitting maximum utilization of fan horsepower.
 

Model Description


Features

High transmission efficiency: aluminum alloy airfoil blades with high transmission efficiency
Light weight: high-strength aluminum alloy material.
Good balance: the fan blades have high precision, and have been tested for weight matching and balance before delivering, the fan running balance has been modified.
Anti-corrosion ability: the surface oxidation treatment process used on the surface of the fan improves the corrosion resistance.
 

Technical Parameters

Fan blades connect to the hub is using a heavy-galvanized iron ring integrally molded with each fan blade. By loosening the hub attachment hardware, blades can easily be rotated to achieve desired pitch, permitting maximum utilization of fan horsepower.
      
Model Fan 
Diameter
(mm)
Nos of 
Blade
Blade
Type
Rate
speed
(r/min)
Air 
flow
  (m³/h)
Total 
pressure
(Pa)
Matching 
Reducer
Model
Power
(kw)
Double Fan Diameter
Noise 
Test Value (dB)
NJF1500-4A 1500 4 A 370 59700 120 NYQ 132-4-370 4 68
NJF1500-4B 1500 4 B 330 57300 130 NYQ 132-4-330 4 65
NJF1500-6B 1500 6 B 250 61200 132.2 NYQ 132-4-250 4 60
NJF1800-4A 1800 4 A 370 81000 139 NYQ 132-4-370 5.5 70
NJF1800-4A 1800 4 A 330 85800 125 NYQ 132-5.5-330 5.5 66
NJF1800-6A 1800 6 A 250 81000 139 NYQ 132-5.5-250 5.5 60
NJF2000-4A 2000 4 A 370 92400 130 NYQ 132-5.5-370 7.5 70
NJF2000-4A 2000 4 A 330 102000 126 NYQ 132-4-330 7.5 66
NJF2000-6B 2000 6 B 250 101400 120 NYQ 160-7.5-250 7.5 61
NJF2100-4A 2100 4 A 370 101400 150.4 NYQ 132-7.5-370 7.5 71
NJF2100-4A 2100 4 A 350 91200 120.1 NYQ 132-5.5-350 5.5 66
NJF2100-6A 2100 6 A 250 91200 120.1 NYQ 132-5.5-250 5.5 61
NJF2400-6B 2400 6 B 330 170000 210 NYQ 160-11-210 11 70
NJF3000-4A 3000 4 A 320 260000 171 NYQ 160-18.5-320 18.5 73
NJF3000-4A 3000 4 A 250 221760 179 NYQ 160-15-250 15 70
NJF3000-6A 3000 6 A 210 202248 147 NYQ 160-11-210 11 65
NJF3500-4B 3500 4 B 320 280000 130 NYQ 160-22-320 22 75
NJF3500-6B 3500 6 B 210 260000 130 NYQ 160-15-210 15 65
NJF3600-4B 3600 4 B 320 320000 170 NYQ 160-22-320 22 76
NJF3600-6B 3600 6 B 210 350000 210 NDQ 160-22-210 22 65
NJF4267-4B 4267 4 B 250 425000 130 NDQ 160-22-250 22 73
NJF4267-6B 4267 6 B 210 450000 215 NDQ 225-37-210 37 66
NJF4500-4B 4500 4 B 210 550000 171 NDQ 225-37-210 37 75
NJF4500-6B 4500 6 B 165 560000 210 NDQ 225-37-165 37 73
NJF5000-6B 5000 6 B 165 550000 120 NDQ 225-30-165 30 75
NJF5000-4B 5000 4 B 160 500000 120 NDQ 225-22-165 22 68
NJF6000-4B 6000 4 B 165 600000 120 NDQ 225-30-165 30 75
NJF6000-6B 6000 6 B 165 650000 120 NDQ 225-37-165 37 76


Fan Assembly Instructions

Newin NJF series hollow type aluminum alloy fans are shipped in unassembled shape, fan blades and hub will be matched well to ensure proper re-assembly.
a. Select a wide open area to accommodate to the fan diameter.
b. Position the fan hub 1 in the center of the work area with the blade sockets.
c. Place fan blade 2 in a blade socket on the hub. On fans where the blades overlap at the hub be sure to have the leading edge under the trailing edge of the forward blade. 
d. Ensure the blade shank safety collar is inboard of the inner hub rim
 

Fan Installation Instructions

1. Be sure cooling tower motor is locked out.
2. Clean the hub bore and driving shaft extension for the full length of the key.
3. Insert the key in the keyway. The top of the key must be below the top of the shaft by not more than 3 mm . The key is a tight fit across the width and must never be altered.
4. After cleaning, apply a coat of anti-seize compound to the engage - ment portion of the shaft.
5. Raise the fan assembly above the shaft and slowly lower the hub onto the shaft with the keyways aligned. Make certain the key does not slide down during installation.
6. Install the Hub Retention Cap Screw with Lock Washer.
 

Application & Usage

Hollow type aluminum alloy fan is widely used in different types of cooling towers, 3 fan blades, 4 fan blades, 5 fan blades, 6 fan blades and 8 fan blades are available for different working condition and air volume conditions. Newin also supplies customized service for customers worldwide.


Fan Maintenance

Timely fan maintenance will prolong the useful life and assure continued trouble-free operation.
After the first week and subsequently at six month intervals:
•  Torque all hardware to check if any loose
•  Visually inspect the fan for airborne debris damage, check with fan cylinder segments, and corrosive attack. Correct any situations deter-mined detrimental to fan operation.
•  Remove any accumulated scale or dirt.
•  Clear blade drain holes at fan tip.


Filed Data for Replacing Cooling Tower Fan 

Newin supplys cooling tower replacement service for brand cooling towers. Inform us below required information so that we could offer correctly: 1. Fan Diameter,  2. Nos of Fan Blades ,  3. Blade Width ,  4. Hub diameter
To match your existing driving shaft, shaft diameter, key width and hub height are also required when placing orders.
 

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