AEC VacTrac Series Conveying Systems - Manual (Page 11)

VacTrac™ Series Conveying Systems Page 11
Mechanical Components WH2-605A.4
• Pickup tubes/wands
• Vacuum and material tubing
Combinations of these components help you build your VacTrac
system for the application you need.
Basic System Types
VacTrac Time-Fill Systems
A VacTrac time-fill system conveys material to an on-line vacuum
receiver for a pre-set time period. When this interval elapses, the
controller conveys material to the next on-line vacuum receiver.
VacTrac Volume-Fill Systems
A VacTrac volume-fill system conveys material to an on-line
vacuum receiver until the material level activates the proximity
switch in the vacuum receiver, or a preset time elapses. When
either of these conditions occur, the controller conveys material to
the next on-line vacuum receiver.
Basic Operation
When you activate the controller, the system energizes and initiates
the conveying cycle. The following components energize:
• The vacuum pump motor starter.
• The vacuum pump vent valve.
• The sequencing valve above the first on-line vacuum receiver
that requires material.
The vacuum pump draws vacuum to that receiver. When the
receiver is full or the time interval elapses, the controller then
signals the atmospheric valve above the next on-line receiver
requiring material to energize, allowing material to convey to that
receiver. The conveying sequence continues to the last on-line
vacuum receiver requiring material.
When the time interval for the last receiver elapses or the receiver
is full, a new conveying cycle begins at the first on-line vacuum
receiver requiring material.