Blow-through rotary valves are used in pneumatic conveying systems for introducing bulk materials into pipelines. The material to be conveyed is brought into the conveying line via the blow-through air lock and carried away by an air stream.

Application area

  • Nominal conveying capacity 0.45 – 320 m³/h at 100% filling level
  • Speed 30 rpm.
  • Differential pressure up to 0.05 MPa
  • Temperature range from -20°C to +60°C
  • Rotor diameter from 100 mm to 630 mm

Material variants

  • 0.6020 (GG)
  • 1.0570 (Steel)
  • 1.4301 (V2A)
  • 1.4571 (V4A)


  • Drive via directly flange-mounted geared engine as DBS COMPACT
  • With free shaft as DBS STANDARD
  • With gland seal packing and external ball bearing as DBS HEAVYDUTY
  • With open cell impeller
  • Sealing with radial shaft seal or stuffing box
  • Housing as welded construction
  • With round or square inlet and outlet
  • Surface primed, painted, blasted, stained or chemically nickel-plated
  • Constructively safe


  • With wearing strips made of spring steel
  • With wear protection inlet
  • With speed controller