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Conveying System Mechanical Components    Chapter 2: Functional Description 
33 of 138 
Atmospheric Valves 
Models: AV1.5, AV2, AV2.25, AV2.5, AV3 
  Mount on cover of vacuum hopper to direct vacuum into hoppers. 
  Relieves vacuum by allowing an in-rush of atmospheric air into the 
system. 
  Compressed air-operated. 
  Selection of black or white neoprene plungers or available high 
temperature plungers. 
  24 VDC or 115 VAC control voltage solenoid. 
  Adds only six inches (15 cm) to the height of vacuum hoppers and 
filter chambers. 
Figure 11:  Typical Atmospheric Valve