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Bơm dòng W

The KRAL pump for difficult fluids.

The W series from KRAL is primarily used when dirty or low-viscosity media are used. Robust polymer coating and continuous flow rates at differential pressures up to 120 bar – these features are combined in the KRAL W series screw pump.

  • Delivery rate: 15 to 290 l/min.
  • Max. differential pressure: 120 bar.
  • Viscosity: > 1 mm²/s.
  • Max. temperature: To 180 °C, magnetic coupling to 300 °C.
  • Installation: Wet or dry.
  • Spindle housing: Nodular cast iron EN-GJS-400, polymer-coated or other material options.
  • Screws: Steel, nitrided.

Pumped fluids such as cooling lubricants are difficult liquids. They contain abrasive dirt, mostly metal residues, and must be pumped at high pressure. In addition, they have a very low viscosity of only about 1 mm²/s.

In the KRAL screw pump of the W series, the screw material and the casing coating have been designed for improved sliding properties in such a way that low viscosity fluids can be pumped with high efficiency.

The running casing is coated with a resistant polymer that can absorb particles. The balancing cylinder of the screw pump has orifice insertions to reduce the leakage rate, therefore efficiency remains high.

  • Flow rates up to 880 l/min.
  • Viscosity of 10,000 mm²/s.
  • Pressure maximum up to 100 bar.
  • Easy installation.
  • Inexpensive product for various pumped media.