Cooling Tower Fans and Related Parts


fan

Cooling Tower Fans and Related Parts

UV rays can lead to disintegration of your fans. High winds can move the fan box to cause it to impact the fan blades as they rotate. Fouling and pitting on the blades can result from exposure to moisture and particles. If your fans are not rotating at the proper pitch or deteriorating, DRB has the solution. We supply fans and fan-related parts from Hudson, Howden, Cofimco and DRB supplies replacement or upgrade fan parts for cooling towers made by SPX, Marley, Fluor, PSI, Hamon, Midwest, GEA, SPIG, and many others.

Inspection Tips

Check to be sure that the bushing and its hardware are in good condition and that the fan bushing is tight on the motor shaft. Check the joints between the support and its motor mount. Look for erosion or corrosion on the blades, especially near welds and between the end plates and blades.

Check the tightness and condition of the hub as well as the bushings between the hub and shaft. Propeller fans are either fixed-pitch or adjustable-pitch. Fixed-pitch propeller fans have welded or riveted connections between the blades and the hub. Check these blades for erosion or corrosion. Carefully inspect the connections between the hub and the blades. Check the tightness and condition of the bushing between the hub and shaft.

Adjustable-pitch propeller fans have bolted connections between the blades and the hub and some means of readjusting the blade pitch angle. Check these blades for signs of erosion, corrosion, or excessive buildup of deposits. Carefully measure the pitch angle of each blade. Readjust the blades within 1-2° of manufacturer’s recommended pitch angle. Check the condition and tightness of the hardware attaching the hub to the blades. If there is a hub cover, examine the connections between it and the fan hub.

Check the overall condition of the fan cylinder material, especially all welds in steel shrouds. Check the tightness and condition of all the assembly and hold-down hardware. Examine adjoining segments for any leaks. Using the longest fan blade, measure the fan blade tip clearance around the cylinder. You can adjust tip clearance by adjusting the support or cylinder according to manufacturer’s instructions.

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