QXP Internal Gear Pumps

Metering function in polyurethane production

The QXP series has been specially developed for metering and conveying the fluids used in polyurethane production. Thanks to the hydrodynamic and hydrostatic bearing support for the ring gear, the pump can be operated with low, as well as with very high, viscosities, and at low speeds. QXP pumps are therefore particularly suitable for variable-speed drives with exacting requirements for precision metering. In addition, the enlarged sealing surfaces enable high efficiencies to be achieved.

QXP Internal Gear Pumps
  • Maximum working pressure up to 250 bar
  • Wide range of displacements up to 500 cm3/rev
  • Metering of fluids in polyurethane production
  • Suitable for fluids such as polyol and isocyanate
  • Optional additional plain-bearing lubrication for maximum operational reliability
Type Operating pressure (continuous) up to
Speed max.
QXP2 250 3-16 1800
QXP3 250 10-32 1800
QXP4 250 20-63 1800
QXP5 250 40-125 1500
QXP6 250 80-250 1500
QXP8 250 250-500 1500

* for 3 to 20000 mm²/s, please consult Bucher Hydraulics

  Type File extension Size
QXP_100-P-000093-en Catalog / Data sheet PDF 215.3 KB
  • Plant engineering in polyurethane production