Open hopper screw pump (PC cake pump) is equipped with a feed hopper with screw conveyor to convey liquid or paste materials that cannot be self-flowing, especially viscous slurry, sewage sludge, industrial sludge with high dry solids concentration, dewatered sludge cake, etc. The pump can also be equipped with an agitator to prevent sedimentation.

Flow range: 0.8 m³/h – 120 m³/h

Maximum pressure: 1.2 Mpa

Speed range: 280 rpm – 960 rpm

Open hopper screw pumps convey viscous to semi-solid products with low or no flowability. They are equipped with a feed hopper with screw conveyor to optimally transfer the product to the conveying element. The hopper can be customized in various forms to maintain the smoothness of the feed, resulting in stress-free feeding and discharging. The inlet and outlet forms can be equipped with optional clamp quick-fit type, flange type, internal thread, external thread, and live joint. Pump body material can be divided into: cast iron, stainless steel 304, stainless steel 316, 316L, according to the actual media requirements.


  • Feed chamber can be easily disconnected for removal of rotor and screw conveyor assembly
  • Optimal flow rate to downstream rotating units by compressing the media in the compression zone
  • Available in block design with direct flange drive system or as a variant with free bare shaft and plug connection
  • Length of the rectangular feed hopper can be adjusted to the upstream components and can be customized


  • Petroleum industry: thick oil transportation, oil and gas mixing, oil-water separation and waste oil recovery system, etc.
  • Chemical and pharmaceutical industry: all kinds of pastes, emulsions, suspensions and so on.
  • Environmental engineering: all kinds of sewage transportation, dewatering sludge transportation, flocculant and its chemical agent metering and dosing, etc.
  • Mineral engineering: production equipment for titanium dioxide, kaolin, calcium carbonate, etc., etc.
  • Food industry: dairy products, fruit juice, fruit puree, vegetable sauce, beer, etc.
  • Paper industry: raw material equipment, pulping and wastewater treatment, etc.

Field case


Open hopper pump is a single screw pump, equipped with a hopper, connecting rod shaft to increase the screw propeller, suitable for liquid or paste materials can not be self-flowing.

Maximum pressure0.6 Mpa, 1.2 Mpa
Maximum flow0.8 m³/h, 2 m³/h, 5 m³/h, 8 m³/h, 12 m³/h, 20 m³/h, 30 m³/h, 45 m³/h, 60 m³/h, 80 m³/h, 120 m³/h
Maximum speed280 rpm, 350 rpm, 400 rpm, 450 rpm, 720 rpm, 960 rpm
Motor power0.75kW, 1.5kW, 2.2kW, 3kW, 4kW, 5.5kW, 7.5kW, 11kW, 15kW, 22kW, 30kW, 37kW, 55kW
Allows the particle diameter1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.8 mm, 5 mm, 6 mm, 8 mm, 10 mm, 15 mm, 20 mm
Technical Parameters