Centrifugal fan configurations

The required service factor is an important specification. The service factor is defined as the ratio of calculated basic horsepower to the applied horsepower. The service factor can be as high as 2 for spiral-bevel reducers, but with continuous service this factor could be as low as 1.25 to have a good reducer life. [Pg.167]

Lubrication is highly important to assure long trouble-free service life. The lubrication system should be capable of providing lubrication for short periods of time and for reverse rotation operation. [Pg.167]

The function of the drive shaft is to transmit power from the prime mover to the gear reducer. It operates in the humid air stream so it must [Pg.167]

It is important that drive shafts be properly balanced. Imbalance not only causes tower vibration but also induces higher loads and excessive wear on the mechanical equipment coupled to the shaft. With drive shafts approaching speeds of 1800 rpm in most cooling tower applications, it is necessary that the shafts be dynamically balanced to reduce vibrational forces to a minimum. [Pg.168]

The instruments usually provided for cooling towers and circulating pumps include [Pg.168]

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