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pulper4_000Black Clawson 200-gallon (760-liter) Hydrapulper

This very flexible piece of equipment can be used both for stock-prep. pulping, mild chemical pulping, and low- or medium-consistency bleaching. The ability to inject steam and/or chemicals is particularly attractive.

Capacity: 200 gallons (760-liters), can hold up to 45-90 OD lb (21-40 OD kg) of pulp at a consistency of 3-6 % (Vokes rotor) or up to 150 OD lb (68 OD kg) of pulp at medium consistency (helical rotor)

Construction: epoxy-lined carbon steel


  • Vokes rotor for low-consistency pulping
  • Hi-con helical rotor for high-consistency pulping and bleaching
  • 20-HP motor with variable-speed drive
  • can be pressurized up to 50 psig due to bolted-head construction
  • steam, gases (oxygen, ozone), and/or chemicals can be injected into vortex zone

pulper650-gallon (190-liter) Pilot Pulper

Capacity: 50 gallons (190 liters), up to 17 OD pounds (7.7 OD kg) of pulp at 5 % consistency or 42 OD pounds 19 OD kg) at 12% consistency

Construction: 316 SS


  • 10-HP motor
  • low-consistency (Vokes) and high-consistency (helical) rotors available
  • atmospheric de-inking capability with Lamort-style passive air intake shroud

Ahlstrom M200 Centrisorter Centrifugal Pressure Screen

screen1This unit has been modified to accept a 100 gpm (380-lpm) feed rate.


  • 50-HP motor, 1200 rpm
  • foil-type (LR) rotor

Baskets available:

  • Slots:
    • 0.010″ (0.25 mm)
  • Holes:
    • 0.063″ (1.6 mm)
    • 0.008″ (0.20 mm)

screen2Gauld Periflow 140 Centrifugal Pressure Screen


  • 60-HP motor with variable-speed drive
  • taper-shear rotor
  • internal accepts (rotor) shower and rejects nozzle flush

Baskets available:

  • Slots:
    • 0.008″ (0.20 mm)
    • 0.016″ (0.41 mm)
  • Holes:
    • 0.032″ (0.81 mm)
    • 0.062″ (1.6 mm)
    • 0.082″ (2.1 mm)

cleaner2_000Equipment for Centrifugal Cleaning

Single bodies of the following centrifugal cleaners are available for flow-through production of cleaned pulp:

Beloit Posiflow This is a forward cleaner with a feed rate of about 70 gpm. A variety of nozzle types are available for optimum cleaning efficiency.

Beloit Uniflow This is a reverse cleaner with a feed rate of about 100 gpm. A variety of reject nozzles and inserts are available.

Celleco Low-Density cleaner This is a heavyweight contaminant cleaner with a feed rate of about 100 gpm.

Noss Horizontal Canister Cleaner (Forward and Reverse) This canister cleaner may be run with either forward, reverse, or forward/reverse modes.

Beloit Pressurized Deinking Module

This unit is designed for flow-through deinking under air-pressurized conditions.

Feed rate is designed at 70 gpm (265 lpm).

Air flow rate and system pressure may be adjusted.

May be operated in single-pass or circulation mode.

Voith Atmospheric Flotation Cell

This pilot unit is designed for flow-through atmospheric deinking.

Feed rate is 150 gpm (570 lpm).

Air is inducted passively at the stock infeed point and mixed with the stock. Foam overflows one side of the unit via a weir, while the deinked stock flows out the other end.

May be operated in single-pass or circulation mode

Bauer Hydrasieve Slanting Screen

Designed to take low-consistency stock and thicken it passively to 3-6 %.

Construction: 316 SS

24″ face

Screen: 0.010 slotted wave plate

Renneberg Pilot Screw Press

Useful for intense dewatering of pulp slurries. Discharge consistencies of up to 40% are possible, depending on the furnish.

Construction: 316 SS


  • 10-HP motor with variable-speed drive
  • 3 feet (1 m) long, 6″ (15-cm) diameter

washer1_001Filtration Engineers Pilot Rotary Drum Filter Washer

  • may be used either for dewatering or intense washing
  • 3 feet (1 m) diameter, 1 foot (0.3 m) face width
  • separate vacuum headers for vat and mat sections
  • 316 SS wetted parts
  • up to three wash showers available with variable flow
  • rider rolls available for increased dewatering
  • vat agitator
  • discharge consistency 8-15 %
  • capacity 30 gpm (114 lpm)

mech1Sunds CD-300 Mechanical Pulping Pilot Plant

Capacity: up to 3 tons/day continuous feed on wood chips


  • two true, real-time stages of refining
  • atmospheric pre-steaming
  • 3:1 volumetric reducing screw for plug feed into reactor
  • impregnator box for impregnation with chemicals
  • 40-gallon (150-liter) pre-heating vessel with nuclear level control and up to 30 minutes retention, 150 psig max.
  • primary refiner: 300-HP, 3600 rpmmech2_000
  • pressurized cyclone permits primary and secondary stages to be run at different pressures
  • secondary refiner: 250-HP, 3600 rpm
  • interstage reactor permits treatment of primary-stage pulp with aqueous or gaseous agents prior to secondary refining, 150 psig max.
  • dedicated process computer with energy consumption monitoring