Njf Series Aluminum Alloy Cooling Tower Fans Hollow Type

• Material: Aluminum Fan
• Blade Material: Aluminum Alloy
• Type: Axial Fan
• Electric Current Type: AC
• Mounting: Fan Stock
• Certification: ISO, CE, CTI
• Model NO.: NJF
• Diameter: 1500mm-6000mm
• Noise: 50-79dB
• Transport Package: Wood Packing
• Specification: Customized
• Trademark: NEWIN
• Origin: China
• HS Code: 841990
• Production Capacity: 15000 Sets/Year

Product Description

 

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.


 

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.




Specification
 

Model	Fan	Nos of	Blade	Rate	Air	Total	Matching	Power	Noise  Test Value (dB)
	Diameter	Blade	Type	speed	flow	pressure	Reducer	(kw)
	(mm)			(r/min)	(m³/h)	(Pa)	Model
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.