Grit Classifer

Operating Principle 

 Screw Grit Classifier

Technical Specifications

  • Flow – 80 m³/h
  • Rotation speed – 12 rpm

Measurements

  • Length – 5000 mm
  • Screw length – 4500 mm
  • Screw diameter – 300 mm

Building Materials

  • Compactor – Full axis of painted carbon steel 10 mm windings thickness
  • Casing + Inlet Box – stainless steel 304
  • A stainless steel 304 Thompson weir allows for free and uniform flow of the filtered liquid
  • Input Flange – 4″ BSTD
  • Output Flange – 8″ BSTD
  • Upper Bearing – an external reinforced carbon steel bearing housing with a double row roller bearing.
  • Bottom Bearing – an external reinforced carbon steel bearing housing with a double row roller bearing, a sealing system of two oil retainers preventing the penetration of liquid into the bearing chamber.
  • Bolts nuts and Accessories – stainless steel 304
  • Drive System – Dual helical transmission hollow axis with three-phase 0.75KW motor IP55
  • Grating – moulded GRP

Operations

The Grit Classifier receives liquids with a large amount of sand and grit from the grit settling device. The liquid enters the classifier through the 4″ pipe to the inlet box in the upper part. The inlet box slows down the flow velocity and releases air and gases through the vent pipe. The sinking sand that accumulates at the bottom of the classifier is led by the screw to the top of the classifier and falls into the evacuation container.

Maintenance Instructions

  • Monthly Service
  • Grease Bearings
  • Transmission is filled with synthetic oil
  • First oil change after 5 years
  • VG 320 Synthetic Oil
LD Systems

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