Internal Gear Pump
for low-viscosity fluids
Series QXV
S very low noise levels
S negligible pressure pulsations
S to 250 bar can be developed at viscosities around
1 mm2/s [cSt]
S multi-stage principle ensures low pressure loading on
each stage, giving outstanding efficiencies
S hydrodynamic bearing support ensures long service life
S used successfully to pump kerosene, diesel fuel, brake
fluids, Pentosin and HFA.

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General

1.1 Product description
The QXV unit is an internal gear pump for low-viscosity flu­
ids. 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 imper­
ceptible pressure pulsations. The large number of closely
spaced sizes ensures that the right size is always available
for every application.

1.2 Application examples
S Test rigs for diesel injection nozzles
S Test rigs for testing Jet A1/fuel controllers for aircraft
turbines
S Rolling mills

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S Fuel pumps for gasturbines
S Welding machines
S Inbrication pump for spindle bearings

Technical data

General characteristics

Description, value, unit

Installation attitude

unrestricted

Mounting method (standard)

oval 2-hole flange to ISO 3019/1 (SAE):
oval 2-hole flange to ISO 3019/2 (metric):

Direction of rotation

right, alternatively left (but not reversible)

Pump drive method

flexible shaft coupling

Min. fluid cleanliness level

NAS 1638, class 8 or ISO 4406, code 19/17/14

Viscosity range

0,8 - 10 mm2/s
(other values on request)

Fluid temperature
(Observe viscosity limits for respective fluids)

min. -20°C, max. +80°C
HFA … +50°C max.
Optimal range: +30° - +60°C

Minimum inlet pressure

0,85 - 1 bar absolute (dependent on pump size and speed,
other values on request)

Maximum pressure at drain port

< 1,5 bar absolute

QXV 3-6
QXV 2+8

Reference: 100-P-000064-E-03
Issue: 10.13

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