Qx series
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ATEX compliant explosion protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General (deviating values according manufacturer's specification) . . . . . . . . . . . . . . . . . . . Main characteristics for pressure range 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main characteristics for pressure range 2 . . . . . . . . . . . . . . . . . . . . . . . ....

Fluid cleanliness class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operational reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bolt-on valves - SAE J518 code 61 / ISO 6162-1 pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pipe flanges - high pressure type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pipe flanges - low pressure type . . . . . . . . . . ....

1 General 1.1 Product description The QX pumps are the 5th generation of Bucher internal gear pumps, which have proven themselves in thirty years of service around the world. Numerous improvements have been made to the straightforward and robust design. Advances in the manufacturing process have made it possible without making higher demands on individual components to build pumps that are considerably lighter and more compact. A new tooth profile, conceived and optimised with the help of CAE, has yielded another significant reduction in noise levels. Large sealing areas result in higher...

IMPORTANT: The main characteristics are valid for hydraulic oils DIN 51524 with a viscosity of 20 ... 50mm2/s. The operating pressure at the pump outlet side is specified also for fire-resistant fluids (HFC). l = standard pump with one suction port ll = model with two suction ports All pump types coded II can be used without the second suction port up to 1200 rpm. 100-P-000021-EN-18/06.2017 Internal Gear Pump QX

2.3 Main characteristics for pressure range 2 Displacement 1) Due to manufacturing tolerances, there may be slight variations in the dis- 4) theoretical value at the max. permitted continuous pressures for mineral placement. oil at n = 1450 rpm 2) max. 20 second and not more than 10% of the duty cycle 3) theoretical value at the max. permitted continuous pressure for mineral oil 5) for speeds > 1450 rpm, the min. permissible inlet pressure is 0.95 bar absolute. For HFC application a second suction port may be required 100-P-000021-EN-18/06.2017 Internal Gear Pump QX

BUCHER hydraulics 2.5 Main characteristics for pressure range 4 1) Due to manufacturing tolerances, there may be slight variations in the displacement. 2) max. 20 second and not more than 10% of the duty cycle 3) theoretical value at the max. permitted continuous pressure for mineral oil 4) theoretical value at the max. permitted continuous pressures for mineral oil at n = 1450 rpm 5) for speeds > 1450 rpm, the min. permissible inlet pressure is 0.95 bar absolute. IMPORTANT: The performance graphs shown are valid for the specified pump models. For other pump sizes, contact Bucher...

3.2 Efficiency (h) measured at speed 1450 rpm, viscosity 42 mm2/s Volumetric efficiency Hydromechanical efficiency intermittent operating pressure as a func­ tion of displacement (see section 2.2) Volumetric efficiency Hydromechanical efficiency intermittent operating pressure Volumetric efficiency Hydromechanical efficiency intermittent operating pressure 100-P-000021-EN-18/06.2017 Internal Gear Pump QX

Volumetric efficiency Hydromechanical efficiency 3.3 Operation with variable-speed drives IMPORTANT: The following main characteristics are to be understood as examples only. They are valid only for the specified pump models and parameters. We would be very happy to advice you on the layout of your drive. QX pumps with variable-speed drive all contain an external drain port. 3.3.1 Typical loading cycle for a QX pump with variable-speed drive Pump QX53-063 with viscosity 20 mm2/s Minimum pressure at suction port as a function of speed Pump QX53-063 measured: with viscosity 42 mm2/s p [bar],...

4 Single pumps4.1 Dimensions frame size 2 - 4 Frame size 1) Pipe flange dimensions, SAE J518 code 61 / ISO 6162-1. - high pressure type up to 420 bar (see section 12.2) - low pressure type for up to 16 bar (see section 12.3) 2) For other shaft ends, contact Bucher Hydraulics GmbH. 3) Threaded port to DIN 3852, Part 2. 4) Pressure port to SAE J518 code 61 / ISO 6162-1 can be supplied for pressure ranges 2 + 3. 5) The dimensions are not valid for low-flow capability pumps (3,3 cm3/U and 4,2 cm3/U, see chapter 4.7). 100-P-000021-EN-18/06.2017 Internal Gear Pump QX

1) Pipe flange dimensions, SAE J518 code 61 / ISO 6162-1. - high pressure type up to 420 bar (see section 12.2) - low pressure type for up to 16 bar (see section 12.3) 2) For other shaft ends, contact Bucher Hydraulics GmbH. 100-P-000021-EN-18/06.2017 Internal Gear Pump QX

depending on operating conditions, a second suction port may be required on: QX51=SAE 1%”, QX61=SAE 2”, QX81=SAE 2^” - see section 2.2.1 1 option 06 = external drain port option 66 = special model 4-hole flange ISO 3019/2 100-P-000021-EN-18/06.2017 Internal Gear Pump QX

external drain port - see special feature 06 special model 4-hole flange ISO 3019/2 external drain port - see special feature 06 option 66 = special model 4-hole flange ISO 3019/2 100-P-000021-EN-18/06.2017 Internal Gear Pump QX

4.7 Pressure range 4 with low-flow capability QX24 with displacements from 3 and 4 cm3/U. external drain port G%” 100-P-000021-EN-18/06.2017 Internal Gear Pump QX

Frame size Pressure range Rotation right (CW) = R (standard) (viewed from shaft end)_left (CcW) = L_ Required: single pump for use with mineral oil Ordering code: QX53-040R • direction of rotation - right (CW) • 2-hole mounting flange to ISO 3019/1 (SAE): sizes QX 3-6 • 2-hole mounting flange to ISO 3019/2 (metr.): sizes QX 2+8 • Nitrile seals • cylindrical shaft end to ISO R775 • black priming, flange without priming 4.8.3 Option -O = without priming 06 = external drain port in the pump rear cover QX 2-5 = G %” 09 = FKM (Viton) seals and without priming 12 = 2-hole...