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EDK Feeder/Delumper by Jeffrey Rader Brand

The EDK Rotary Feeder/Delumper is ideal for precise volumetric feeding of polypropylene and polyethylene resin under high pressures and temperatures.


The EDK Rotary Feeder/Delumper was designed as a response to clients in the plastics industry with a need for an efficient airlock that has shearing, variable speed and anti-stall capabilities. It is built for rugged applications.

The EDK design uses two opposing shear knives. When the anti-stall control system senses a stall (high motor load), the rotor direction is automatically reversed. If successful in clearing the jam, the rotor returns to normal rotation. If not, it will continue to reverse direction up to six times or three cycles before shutting down and alerting the operator.

Advantages & Benefits:

  • Anti-stall
  • Carbon steel or stainless steel construction
  • Special hard facing on rotor tips
  • Knives and end seals are adjustable
  • Polished rotor surfaces prevent material build-up
  • High shearing energy
  • Rotor reverses to clear jams
  • Optional stainless steel components
  • Accurate metering
  • Variable speed control
Technical Data
  • Designed to operate at a differential pressure of 15 psi (1 bar) and at temperatures up to 230ºF (110°C)
  • The maximum static differential pressure is 50 psi (3.4 bar)
  • Rotor blades are ground to an RMS 16-22 finish
  • Tips have 410 stainless steel overlay machined to match the rotor bore