Conveyor Types:

1. Conveyor transfer less than 3' fall. For greater fall, provide additional exhaust at lower belt (see #3).
   h_e = 0.25 VP_d
2. Conveyor to elevator with magnetic separator.
   h_e = 0.25 VP_d
3. Chute to belt transfer and conveyor transfer, greater than 3' fall. Use additional exhaust for dusty material as follows:
   Belt width 12"-36", Q = 700 cfm
   Belt width above 36", Q = 1,000 cfm
   h_e = 0.25 VP_d
   Note: Dry, very dusty materials may require exhaust flowrates 1.5 to 2.0 times stated values.

• Transfer points:
  Enclose to provide 150 - 200 fpm indraft at all openings. (underground mining tunnel ventilation will interfere with conveyor exhaust systems.)
  
• Detail of Belt Opening. 2" Clearance for load on belt.
  
• Q = 350 cfm/ft belt width for belt speeds under 200 fpm. (minimum)
  Q = 500 cfm/ft belt width for belt speeds over 200 fpm and for magnetic separators. (minimum)
  Duct velocity = 4,200 - 4,500 fpm
  h_e = 0.25 VP_d
  
• Conveyor Belts:
  Cover belt between transfer points
  Exhaust at transfer points
  Exhaust additional 350 cfm/ft of belt width at 30' intervals. Use 45° tapered connections.