The document introduces an internal gear pump for low-viscosity fluids, which has very low noise levels and negligible pressure pulsations. The pump can develop pressures up to 250 bar at viscosities around 1 mm2/s (cSt) with high efficiency by using a multi-stage principle that ensures low pressure loading on each stage. The hydrodynamic bearing support ensures long service life. The pump has been successfully used to pump kerosene, diesel fuel, brake fluids, Pentosin, and HFA.
The Bucher QXV is an internal gear pump specifically designed for low-viscosity fluids, capable of developing pressures up to 250 bar with high efficiency. It utilizes a multi-stage principle to ensure low pressure loading on each stage and features hydrodynamic bearing support for long service life. The pump is suitable for applications such as test rigs for diesel injection nozzles, fuel pumps for gas turbines, and welding machines.
| Maximum pressure | 250 bar |
|---|---|
| Viscosity range | 0.8...10 mm2/s |
| Fluid temperature min | -20°C |
| Fluid temperature max | +80°C |
| Mounting method | oval 2-hole flange |
| Direction of rotation | right, alternatively left |
| Pump drive method | flexible shaft coupling |
| Min. fluid cleanliness level | NAS 1638, class 8 |
It is used to pump aviation jet fuel, automotive fuels, paraffin oil/kerosene, brake fluids, Pentosin and HFA fluids.
The optimal range is +30°C to +60°C.
Up to five pump stages can be connected in series.