Rexroth EHP Electrohydraulic pumps

Introduction

Rexroth EHP Electrohydraulic pumps are staged with a 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 ? = 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, and brake valves, the type of filtration selected must be adapted to the sensitivity of these devices/systems. Safety requirements for the whole system are to be observed.
Please contact us concerning 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

Reference: boschrexroth.com

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