Rexroth EHP Electrohydraulic pumps

Rexroth EHP Electrohydraulic pumps staged modular principle that electric motor and pump can be combined according to the required performance, guaranteeing:

  • high efficiency
  • low noise
  • high operating pressure
  • compact dimensions
  • long service life
  • consistent quality

Application areas

As drive groups in vehicles, they are employed primarily for the lifting and steering functions.

Specification

General
Installation position Vertical, hydraulic pump at bottom; horizontal as shown in dimensions drawing. Condensation opening, if fitted, at bottom
Ambient temperature range between –25 °C and +60 °C
Mounting Saddle mounting with wire tie
Pump
Design External gear pump
Type AZPB… AZPF… AZPJ… AZPS…
Displacement cm³/rev 1.0 – 7.1 4.0 – 22.5 12.0 – 22.5 4.0 – 22.5
Suction pressure bar min. 0.7 max. 3 (absolute)
max. continuous pressure p1**) 200 – 250 180 – 250 250 220 – 250
max. intermittent pressure p2**) 230 – 280 210 – 280 280 250 – 280
max. peak pressure p3**) 250 – 300 230 – 300 300 290 – 300
Line ports AZPB/F/S: Thread, flange, others on request
Fluids – Mineral oil compliant with DIN 51524, 1–3, however under higher load at least HLP compliant with DIN 51524 Part 2 recommended.
– Comply with RE 90220
– Further operating fluids possible after consultation
Viscosity 12 … 800 mm²/s permitted range
20 … 100 mm²/s recommended range
… 2000 mm²/s permitted for start up
Temperature of hydraulic fluid –25 … +80 °C
Filtration *) At least cleanliness level 21/18 /15 compliant with ISO 4406 (1999)
Electric motor
Design DC motor with compound or series winding
Size (code) I K L P S T
Terminal case Ø mm 110 . . . < 120 20 . . . < 130 130 . . . < 140 150 . . . < 160 160 . . . < 170 170 . . . < 180
Voltage (volts) 12, 24, 40, 48, 72, 80 see overview of range
Power output (kW) 1.5 … 8.1, other outputs on request
Protection class see Program overview
Diagrams These are valid for operation under the following conditions:
Ambient temperature +20 °C
Electrolyte temperature +20 °C
Motor temperature +20 °C
Oil temperature +50 °C
Viscosity ν = 32 mm2/s
S2, S3 see VDE 0530
Relay (not available in every version)
Voltage 12 V 24 V
Exciter current 1.05 AM 12.09 AM
Contact current at S3 = 12 % 350 A
Contact current, continuous 150 A
Protection class IP54 / IP6K9K / IP66 auf Anfrage

) On hydraulic systems or devices with critical counter-reaction, such as steering valves, brake valves, the type of filtration selected must be adapted to the sensitivity of these devices/systems.Safety requirements pertaining to the whole systems are to be observed.
Please contact us with respect to applications with high numbers of load cycles
.
) Detailed information, see series

  • B: RE10087
  • F: RE10089
  • J: RE10094
  • S: RE10095

Download Datasheet: Rexroth EHP Electrohydraulic pumps

ref: boschrexroth.com

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