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Prefamac Cooling Tunnels

"Light" Model

Standard Model

 

  • Can be custom built to your own requirements

  • Made of pearled stainless steel.

  • Polyester covers.

  • Covers can be opened completely by means of hinges.

  • Stepless belt speed adjustment.

  • Pneumatic steering mechanism at tunnel entrance and exit.

  • Adjustable belt tension.

  • Adjustable 'breaks' at either end of the tunnel.

  • Cooling system completely insulated and double jacketed.

  • Air or water cooled cooling group(s).

  • One or more evaporators each equipped with fans.

  • Evaporators can be adjusted individually by individual thermostats

 

Cooling Tunnel in more detail

  • COOLING TUNNEL TYPE II, LENGTH 12 M, 10 M COOLED, BELT WIDTH 620 MM

  • COOLING TUNNEL TYPE II, LENGTH 22 M, 20 M COOLED, BELT WIDTH 820 MM

  • COOLING TUNNEL TYPE II, LENGTH 32 M, 30 M COOLED, BELT WIDTH 1300 MM

  • Total length tunnel: 12.000 mm / 22.000 mm / 32.000 mm.

  • Length cooled part: 10.000 mm / 20.000 mm / 30.000 mm.

  • Length entrance part: 1.000 mm

  • Length exit part: 1.000 mm

  • Width transport belt: 620 mm / 820 mm / 1.300 mm.

  • Height of activity, 930 mm, 50 mm adjustable.

  • Tunnel underframe out of profile tube square.

  • Outer leading track out of stainless steel 1.5 mm.

  • Tunnel sides out of plate 1.5 mm.

  • Inner leading track out of plate 1.5 mm.

  • The complete cooling transport is double jacket, and 30 mm insulated.

  • Belt layer type Narvik Harlekeyn. This belt will be welded endless during test assembling.

  • Covers out of polyester, 25 mm insulated.  

  • Each cover can be opened by hinges.

  • Valves to collect product waste.

  • All metal parts are completely in epoxy‑lacquer, colour RAL 1015.

  • Belt provided with pneumatic steering at start & end of tunnel, controlled by photo technique (belt tracking unit).

  • Strain of belt controlled by a separate cylinder (tension unit), placed behind drive drum (drive unit).  

  • All pneumatic material from the brands Pneuvano, Festo or Joucomatic.

  • The strain is also controlled at the ends of the tunnel, by an adjustable knife (+/- 100 mm).  

  • The drive drum has a diameter of 300 to 400 mm.  

  • The speed of the belt is adjustable from 1.5 to 3.0 meters p/ minute, by a frequention regulator.

  • Drive motor brand Nord.

  • Winding: 50 Hz, voltages: 380 V 3 ph.

  • Cooling group DOOM, air or water cooled.

  • Cooling gas Freon R22.

  • The cooling group is placed in a separate air conditioned room or outside, with a maximum distance  of 4 meters.

  • Cooling principle by convection on top and radiation on bottom.

  • The cooling installation contains 2 / 3 / 3 evaporators 9.000 Watt, each with two blowers.

  • The evaporators are separately adjustable by different thermostats, brand  Omron.

  • The temperature is controlled at the suck side of the evaporators, by means of a PT100 sensor.

  • Return transport belt in cooled space (not outside the tunnel).