QXEH series
12Pages

Internal Gear Pump Series S Industrial model S For variable-speed drives

2/12 100-P-000096-EN-07/10.2016 Internal Gear Pumps, QXEH.2

Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Application examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main characteristics . . . ....

BUCHERhydraulics 1.1 Product description The pumps in the new QXEH range are single-stage units that use just one pair of gear wheels. Their compact and heavy-duty construction introduces a new and pioneering benchmark for pumps. The improved dimensional stability of all rotating components results in higher overall rigidity levels, and this in turn decisively enhances the performance ratings of the QXEH pumps. In addition, a vital improvement to the hydrodynamic lubrication of the ring gear has been implemented by regulating the flow profiles in the critical bearing areas by means of...

IMPORTANT. The main characteristics are valid for mineral oils DIN 51524 with a viscosity of 20 to 50 mm2/s 1) Due to manufacturing tolerances, there may be slight variations in the displacement. 2) Maximum intermittent pressure for a maximum of 20 seconds, but not for more than 40% of the duty cycle. 3) Theoretical value at the maximum permitted continous pressure for mineral oil. 4) Theoretical value at the maximum permitted continous pressure for mineral oil at n = 1450 rpm 5) Maximum rated speeds for inlet pressure > 0.95 bar (abs.) and outlet pressure > 100 bar. 3 Characteristic curves...

3.2 Efficiencies [h] Measured at viscosity 42 mm2/s (cSt), speed 1450 rpm Volumetric efficiency Hydromechanical efficiency Volumetric efficiency Hydromechanical efficiency Volumetric efficiency Hydromechanical efficiency Volumetric efficiency Hydromechanical efficiency 100-P-000096-EN-07/10.2016 Internal Gear Pumps, QXEH.2

3.3 Operation with variable-speed drives IMPORTANT. Only possible with option 06 3.3.1 Typical load cycle for in pressure-holding operation QXEH52-063R06 pump with separate drain port, measured with viscosity of 40 mm2/s (cSt) Minimum pressure (absolut) at pump inlet as a function of speed Continuous operation Minimum speed as a function of pressure intermittent operation on re­ quest Pressure-holding operation Q = 0 l/min for up to 60 s Suction pressure absolute [bar] 3.4 Accelerations graph with QXEH62 100-P-000096-EN-07/10.2016 Internal Gear Pumps, QXEH.2

3.5 Dimensions Frame size 1) Pipe flange dimensions, SAE J518 code 61 bzw. ISO 6162-1 2) For other shaft ends please consult Bucher Hydraulics - high-pressure type for up to 420 bar (see section 8.1) 3) Threaded port to DIN 3852, Part 2 - low-pressure type for up to 16 bar (see section 8.2) 1 External drain port on models with option 06 100-P-000096-EN-07/10.2016 Internal Gear Pumps, QXEH.2

Direction of rotation (viewed from the shaft end) right / CW (standard) = R Options: see section 3.8 Seal material: Viton For use with mineral oil Ordering Code: QXEH52-040R09 • cylindrical shaft end to ISO R775 • black priming, flange without priming Ordering example: Required: single pump 3.7 Standard configuration • direction of rotation - right (CW) • 2-hole mounting flange to ISO 3019/1 (SAE) • Nitrile seals -O = Pump without priming 06 = External drain port 09 = Seal material FPM (Viton), without priming 11 = Shaft end with spline shaft SAE ANSI B92.1,...

4 Fluid The oil for QXEH products must have a minimum cleanliness level of 20/18/15 to ISO 4406 or class 9 to NAS 1638. We recommend the use of fluids that contain anti-wear additives for operation with boundary lubrication. Fluids without appropriate additives reduce the service life of pumps and motors. The user is responsible for maintaining, and regularly checking, the fluid quality. Bucher Hydraulics recommends a Brugger EN/DIN 51347 load capacity > 30 N/mm2. This is particularly important in applications with variable-speed drives and speeds < 1000 rpm. Cleanliness class (RK) onto ISO...

8.1 Pipe flanges - high pressure type (thread flange) - Max. operating pressure 420 bar - Flange size SAE J518 code 61 / ISO 6162-1 Threaded pipe flanges are spot-faced for DIN 2353 pipe fittings Material: ST37 (for Viton seals contact Bucher Hydraulics) 8.2 Pipe flanges - low pressure type (welding flange) _X JU F_ Ordering-number - Max. operating pressure 16 bar - Flange size SAE J518 code 61 / ISO 6162-1 Material: HST37 (for Viton seals contact Bucher Hydraulics) 1) For connection pipes, we recommend the use of seamless precision steel tube to DIN 2391 with a wall thickness of 6 mm...

8.3 Bolt-on valves - SAE J518 code 61 / ISO 6162-1 pattern Pressure relief valve Pressure relief valve solenoid control S A G DA Accomulator charging valve Technical data sheet 100-P-000123- Technical data sheet 100-P-000119- Technical data sheet 100-P-0000124- Examples for Bolt-on valves, mounted on QX Internal Gear Pumps Bolt-on valve with threaded ports Bolt-on valves with pipe flanges SAE1) Bolt-on valve with pipe flanges SAE + RVSAE2) ASDF+RF+RVSAE+DPSAE+ZPSAE 1) Pipe flange see chapter 8 2) Please ask BUCHER HYDRAULICS for check valves IMPORTANT: For detailed informations on Bolt-on...