NGF Series Stailess Steel Hollow Cooling Tower Fan

NGF series stainless steel 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 2000 to 5000mm.

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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	Motor Power (KW)	Rotate Speed (rpm)	Blade Angle (A)	Static Pressure (Pa)	Air Volume (m³/h)	Hub Heigh (H)	Hole Dia. (Ød)	Key Width (F)	Key Depth (T)
NGF-2000-4	5.5	320	25	75	90000	108	38	8	3.3
			30	77	100000
			35	70	110000
NGF-2200-4	5.5	265	25	69	100000	123	50	12	3.3
			30	73	105000
			35	63	115000
NGF-2400-4	5.5	250	25	60	130000	123	50	12	3.3
			30	61	140000
			35	62	150000
NGF-3000-4	7.5	230	25	70	180000	138	50	12	3.3
	11		30	68	200000
	11		35	68	220000
NGF-3400-4	11	200	25	56	240000	148	60	12	3.3
	11		30	58	270000
	15		35	60	300000
NGF-3700-4	15	200	25	61	310000	158	75	20	4.9
	15		30	65	340000
	18.5		35	69	370000
NGF-4200-4	18.5	175	25	68	400000	158	75	20	4.9
	22		30	65	440000
	22		35	63	480000
NGF-5000-4	30	170	25	70	600000	158	75	20	4.9
	37		30	76	640000
	37		35	82	680000

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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