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Gates' DraftguardTM Anti-Rotation Device

Gates' DraftguardTM Anti-Rotation Device

Air-cooled heat exchanger (ACHE) drives can spin backwards when fans are off but subjected to air movement across the fan blades. This is known as back-drafting or wind-milling and can be dangerous. Technicians are often in close contact with the drive, and in extreme situations bodily damage occurs due to back-drafting. DraftguardTM anti-rotation device secures the drive from spinning backwards during maintenance operations. Draftguard also protects the entire system from extreme shock load which causes unnecessary wear of the motor components and which can lead to belt breakage. Often design engineers don't consider the effect a drive which rotates the opposite direction causes. Draftguard protects the drive from damage, or other unsatisfactory events from occurring, when units back draft. The design of the flange plate allows Draftguard to mount on nearly any bushing or shaft which eliminates the need of retrofitting drive components. Gates Draftguard can be mounted to prevent rotation in either the clockwise or counter clockwise direction. It can easily be mounted on either vertical or horizontal shafts and typically fits within the existing fan cage.

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