Vacuum screw pumps RVS + SCREW by PEDRO GIL

Increased compression efficiency for faster, smoother pumping

Pumps designed with a single screw for a wide range of chemical and industrial processes. Two rotors turn in opposite directions without touching each other or the housing, appropriately geared and housed within the pump unit and without any liquid valve closure. The rotors are synchronized through a pair of gears sucking the gases from the liquid closure process and moving them, by way of other rotors to the discharge flange.

The hybrid screw design with technical combination of variable pitches increases the compression efficiency compared to traditional designs and provides significantly faster and smoother pumping. The resulting reduction in heat generation makes safe pumping possible. The unique hydrodynamic spiral jacket cooling enables ATEX. In addition, cooling is no longer necessary up to 800 m3/h.

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Vacuum screw pumps RVS + SCREW

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Specifications
Displacementmax. 2700 m³/h
Rotation2900 Upm
Motor power 37 kW
Ultimate pressure (Torr)7.5×10-3
Material version
ScrewCoated ductile cast iron GGG40
CasingCoated ductile cast iron GGG40
Lip sealPTFE lip seal
Slip SleeveCeramic plated stainless steel
Shaft sealsHV (suction): Double lip seal PTFE
LV (discharge): Mechanical seal + lip seal
BearingsHV (suction): Roller ball bearings
LV (discharge): Angular double ball bearing
Drive end: Single ball bearing
Gear box oil: Shell Turbo Oil T
Read end bearing: Mobile 1 Grease
Application
  • Biotechnology
  • Pharmaceuticals
  • flavours and fragrances
  • fats and oils
  • sugars
  • plastics and resins
  • paints and glues
  • Organic solvents
  • silicon
  • oils
  • dyes and pigments
  • polymers
  • specimens
  • food
  • metals
  • Pervaporation
  • Extrusion
  • solvent recovery
  • evaporation
  • crystallization
  • distillation
  • filtration
  • polysilicone
  • degassing
  • drying
  • freeze drying
  • molecular distillation
Advantage
  • High speed pumping.
  • Greater level of vacuum achievable.
  • Unique cooling system with hydrostatic spiral.
  • No cooling gas necessary up to 800 m3/h.
  • Lower discharge temperature.
  • Less power absorbed.
  • Lower vibration level.
  • Lower noise level.
  • Easier use and lower maintenance costs.
  • Robust hexagonal housing design.
  • Wide range of compatible processes.
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