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.
As governments, associations, and NGOs around the world seek to protect consumers, national and regional standards are becoming mandatory, challenging manufacturers and making testing and certification necessary for any product developed and brought to market.
There is currently much discussion around the term "platform," which may be preceded by the adjectives "mobile," "wearable," "medical," "healthcare," etc. However, regardless of the platform being discussed, they usually have one key aspect in common: They tend to be wireless. So, why is this one aspect so fairly universal? The answer is convenience.
Everyone has a MEMS story. For most of us it’s probably the airbag that saved our lives or the life of a loved one. Perhaps it’s the tire pressure sensor that alerted us about deflation before we were stranded alone on a dark muddy road.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.