Description For load-sensing systems in smaller mobile machines Size 18 … 35 Nominal pressure 250 bar Maximum pressure 280 bar Open circuit Features Significant fuel savings up to 15% compared to constant systems Optimized efficiency, though same power at less fuel consumption Increased service life compared to gear pumps Compact design by integrated controller A wide range of highly adaptable control devices for all important applications Stepless flow variation by adjusting the swashplate angle. Low operating noise High power density Excellent suction characteristics High flexibility through interchangeable through drive adapters Swashplate design Type code 1) Connectors for other electric components may differ 1) For size 35, not for through drive 2) Involute spline according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5 3) Mounting drillings pattern viewed on through drive, with service line port B on right Notice Observe the information in the project planning notes chapter Observe the project planning notes regarding each control device In addition to the type code, please specify the relevant technical data when placing your order Technical data Table of values Size 18 28 35 Displacement geometric, per revolution Vg max cm³ 18 28 35 Vg min cm³ 0 0 0 Nominal pressure pnom bar 250 250 250 Maximum pressure pmax bar 280 280 280 Maximum speed 1) 2) with Vg max nnom rpm 3300 3200 3000 Flow at Vg max and nnom qV l/min 59 89 105 Power at qV nom and pnom P kW 25 37 44 Torque at Vg max and pnom M Nm 72 111 139 Rotary stiffness S3, 3/4 in 11T 16/32DP c kNm/rad 9.78 9.78 - S4, 7/8 in 13T 16/32DP c kNm/rad 12.88 12.88 18.6 S5, 1 in 15T 16/32DP c kNm/rad - - 22.9 P3, 20 mm c kNm/rad 16.49 16.49 - K3, 19.05 mm c kNm/rad 17.27 17.27 - Moment of inertia for rotary group JTW kg·m² 00686 0737 0159 Maximum angular acceleration 3) ɑ rad/s² 6800 5500 5000 Case volume V l 0.5 0.5 0.6 Weight without through drive m kg 12.3 12.3 18.4 Weight with through drive m kg 13.5 13.5 19.8 1) The values are applicable: – at an abs. pressure pabs = 1 bar at the suction port S – for the optimum viscosity range of vopt = 36 to 16 mm2/s - with hydraulic fluid on the basis of mineral oils 2) For a pressure of S , please contact us. 3) The data are valid for values between the minimum required and maximum permissible rotational speed. It applies for external stimuli (e.g. diesel engine 2 to 8 times rotary frequency, cardan shaft twice the rotary frequency). The limit value is only valid for a single pump. The load capacity of the connection parts must be considered. Determining the operating characteristics Flow [l/min] Torque [Nm] Power [kW] Key Vg Displacement per revolution [cm3] Δp Differential pressure [bar] n Rotational speed [rpm] ηv Volumetric efficiency ηhm Hydraulic-mechanical efficiency ηt Total efficiency (ηt = ηv • ηhm) Notice The table values are theoretical values without consideration of efficiencies and tolerances. The values are round
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