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String grader

The string grader is designed to separate smaller from bigger size produce. In a string grader produce rolls over the strings to the outfeed.

Product Information

The onion topper is designed to remove the tail and foliage of onions and shallots cleanly and safely with rotating blades, while also removing loose skin and dirt.

The string grader is designed to separate smaller from bigger size produce. In a string grader produce rolls over the strings to the outfeed. Undersized produce falls between the strings.

The string grader has various applications like undersize removal or as a pregrader for onion toppers. By separating smaller from bigger produce, the capacity per individual onion topper increases. Pregrading also increases the quality of the topping process.

The String grader has 17 strings of 70 cm long which can be adjusted between 50-75 mm. The diameter of the strings is 25 mm. The size adjustment of strings can be manual or automatic.

If required, the string grader can be on the subframe to accommodate height differences. The subframe can be made from painted mild steel, stainless steel, and galvanized steel. The height of the subframe can be varies from 0-7 meters.

Characteristics

  • Separate smaller from bigger produce

  • Used as a pregrader for onion topper for efficient topping effect
  • 17 strings of 70 cm long
  • The diameter of the strings is 25 mm
  • Size adjustment between strings is 50-75 mm
  • The size adjustment of strings can be manual or automatic
  • Waste collection either via a chute or transport conveyor

Specifications

  PS 70
Length of the string (in cm) 70
Amount of strings 17
Distance between strings (in mm) 50 – 75
Diameter of strings (in mm) Ø 25

Options

  • Material and treatment (frame)
Painted mild steel
Frame is from painted mild steel. The bearings and drive/idle rollers are from mild steel. The strings are PU
  • Electrical control
No electric
Motors and necessary sensors
Stand-alone
Motors, necessary sensors and control panel. The length of the cable is 5, 10, 15 or 20 meter
Central control in line
Motors and necessary sensors
  • Material and treatment (electrical panel)
Painted mild steel
The electrical panel is made from painted mild steel
Stainless steel
The electrical panel is made from stainless steel AISI304
  • Material and treatment (subframe)
Painted mild steel
It is made from painted mild steel
Stainless steel
It is made from stainless steel AISI304
Galvanized steel
It is made from galvanized steel
  • Height of subframe
Height of subframe
0 to 7 meter
  • Adjustment grading size
Manual
The grading size can be adjusted manually
Automatic
The grading size can be adjusted automatically
  • Waste collection
Chute
A waste chute is included on the side. The chute will guide waste to a transport conveyor or box

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