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QXV series
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Catalog excerpts

QXV series - 1

Internal Gear Pump for low-viscosity fluids Series QXV very low noise levels negligible pressure pulsations to 250 bar can be developed at viscosities around 1 mm2/s [cSt] multi-stage principle ensures low pressure loading on each stage, giving outstanding efficiencies hydrodynamic bearing support ensures long service life used successfully to pump kerosene, diesel fuel, brake fluids, Pentosin and HFA. 1 General 1.1 Product description The QXV unit is an internal gear pump for low-viscosity fluids. By using several pump stages connected in series, pressures to 250 bar can be developed with high efficiency at viscosities of around 1 mm2/s . The QXV is being used with great success to pump aviation jet fuel, automotive fuels, paraffin oil/kerosene, brake fluids, Pentosin and HFA fluids. Dependent on the requirements of the application, up to five pump stages can be connected in series. The unit is based on the well-known QX internal gear pump, which is distinguished by its very low noise levels and almost imperceptible pressure pulsations. The large number of closely spaced sizes ensures that the right size is always available for every application. Fuel pumps for gasturbines Welding machines Lubrication pump for spindle bearings 1.2 Application examples • Test rigs for diesel injection nozzles • Test rigs for testing Jet A1/fuel controllers for aircraft turbines • Rolling mills

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QXV series - 2

1) Recommended speeds: • The lower the speed, the smaller the AP/stage (linear relationship) • Speeds for 50 and 60 Hz 2) Second suction port is necessary for n > 1200 rpm (see section 5.3 Special features) 3) Do not run up pump against pressures higher than 20 bar 100-P-000064-EN-05/08.2015 Internal Gear Pump QXV

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QXV series - 3

3 Performance graphs Measured at a viscosity of 2.3 mm2/s [cSt] 3.1 Pressure range 1 3.1.1 Volumetric efficiency 3.1.2 Hydro-mechanical efficiency © © © © © 3.2 Pressure range 2 3.2.1 Volumetric efficiency nvol. [%] 3.2.2 Hydro-mechanical efficiency nhm [%] © © © © 3.3 Pressure range 33.3.1 Volumetric efficiency 3.3.2 Hydro-mechanical efficiency nhm [%] 1 100-P-000064-EN-05/08.2015 Internal Gear Pump QXV

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QXV series - 4

3.5 Pressure range 53.5.2 Hydro-mechanical efficiency 95 90 85 80 75 70 0 50 100 150 P [bar] 100-P-000064-EN-05/08.2015 Internal Gear Pump QXV

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QXV series - 5

1) For other shaft ends, consult Bucher Hydraulics GmbH 2) Pressure port to SAE J518 can be supplied for pressure ranges 2+3

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QXV series - 6

1) For other shaft ends, consult Bucher Hydraulics GmbH 2) Pressure port to SAE J518 can be supplied for pressure ranges 2+3 100-P-000064-EN-05/08.2015 Internal Gear Pump QXV

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QXV series - 7

Series: internal gear pumps for low-viscosity fluids QXV Frame size Pressure range 5.1 Ordering example Required: internal gear pump, type QXV For use with diesel fuel oil. Ordering code: QXV 36-012 R 5.2 Standard configuration • Direction of rotation - right • 2-hole mounting flange to ISO 3019/1 (SAE): sizes QXV 3-6 2-hole mounting flange to ISO 3019/2 (metric): sizes QXV 2+8 • Viton seals • Cylindrical shaft end to ISO R775 • External drain port R in pump end cover 5.3 Option 12 2-hole mounting flange to ISO 3019/2 (metric) for frame sizes QXV 3-6 83 Second suction port on...

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QXV series - 8

S Good filtration is extremely important with low viscosity fluids. Maximum fluid cleanliness 19/17/14 of ISO4406. Level of NAS 1638, class 8 S Only use QXV pumps within the specified speed range. S We recommend that the fluid level in the reservoir should be above the centre line of the pump S Pumps must be driven by means of a flexible coupling S The temperature difference between a pump and the fluid entering it must not exceed 20 _C S Attention: check the motor's direction of rotation! S For details, see Operating Manual 100-I-000014 S When running the pump under pressure for the first...

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