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4/4 directional control valves, direct operated,
with electrical position feedback and integrated
electronics (OBE)
Type 4WRPEH
Features
▶ Reliable - proven and robust design
▶ Safe - fail-safe position of the control spool in switched-
off condition
▶ Energy-efficient - no pilot oil demand
▶ High quality - control spool and sleeve in servo quality
▶ Flexible - suitable for position, velocity and
pressure control
▶ Precise - high response sensitivity and little hysteresis
▶ Size 6
▶ Component series 3X
▶ Maximum operating pressure 350 bar
▶ Rated flow 4...40 l/min (
Contents
Features
Accessories, additional information
RE 29121, edition: 2014-01, Bosch Rexroth AG
RE 29121
Edition: 2014-01
70 bar)
∆p =
8 ... 10
1
2, 3
3
4
5, 6
7
7
11
12
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Summary of Contents for Bosch Rexroth 4WRPEH
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Page 1: Table Of Contents
▶ Flexible - suitable for position, velocity and Block diagram/controller function block pressure control Electrical connections, assignment ▶ Precise - high response sensitivity and little hysteresis Characteristic curves 8 ... 10 Dimensions Accessories, additional information RE 29121, edition: 2014-01, Bosch Rexroth AG... -
Page 2: Ordering Code
● (inflection at 40 %) ● = Delivery range Flow characteristics Linear Inflected characteristic curve, linear Component series 30 … 39 (30 … 39: Unchanged installation and connection dimensions) Seal material NBR seals FKM seals Bosch Rexroth AG, RE 29121, edition: 2014-01... -
Page 3: Symbols
Further details in the plain text Symbols P: Inflection 60 % Linear P: Inflection 40 % = 15.25 l/min] Vnom C3, C5 C4, C1 Standard = 1:1, q 2:1 only with rated flow = 40 l/min Vnom RE 29121, edition: 2014-01, Bosch Rexroth AG... -
Page 4: Function, Section
In case of a command value presetting of 0 V, the electronics adjusts the control spool against the spring to central position. In deactivated condition, the spring is untensioned to a maximum and the valve is in fail-safe position. Bosch Rexroth AG, RE 29121, edition: 2014-01... -
Page 5: Technical Data
Flow with different ∆p: adhered to in hydraulic systems. Effective filtration prevents ∆p · Vnom faults and at the same time increases the life cycle of the components. For the selection of the filters see www.boschrexroth.com/filter. RE 29121, edition: 2014-01, Bosch Rexroth AG... - Page 6 Functional earth and screening See pin assignment (CE-compliant installation) Adjustment Calibrated in the factory, see valve characteristic curve Conformity CE according to EMC Directive 2004/108/EC Tested according to EN 61000-6-2 and EN 61000-6-3 Bosch Rexroth AG, RE 29121, edition: 2014-01...
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Page 7: Block Diagram/Controller Function Block
Connection cables: Recommendation: – up to 20 m cable length type LiYCY 7 x 0.75 mm – up to 40 m cable length type LiYCY 7 x 1.0 mm Only connect the screening to PE on the supply side. RE 29121, edition: 2014-01, Bosch Rexroth AG... -
Page 8: Characteristic Curves 8
B → T 50 cm³/min Fail-safe p = 0 bar ⇒ 7 ms Internal shut-off in case of error p = 100 bar ⇒ 10 ms ≤ 17.5 V and/or I ≤ 2 mA Bosch Rexroth AG, RE 29121, edition: 2014-01... - Page 9 Signal change in % 0 – 100 – 0 0 – 75 – 0 0 – 50 – 0 0 – 25 – 0 0 – 10 – 0 Time in ms → RE 29121, edition: 2014-01, Bosch Rexroth AG...
- Page 10 –18 Signal ±1 % –21 Signal ±5 % –24 Signal ±25 % –27 Signal ±100 % –30 Frequency in Hz → Flow/load function with maximum valve opening Valve pressure differential in bar → Bosch Rexroth AG, RE 29121, edition: 2014-01...
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Page 11: Dimensions
Deviating from the standard: Ports P, A, B, T Ø 8 mm Minimum screw-in depth: Ferrous metal 1.5 x Ø Non-ferrous 2 x Ø Notice! The dimensions are nominal dimensions which are subject to tolerances. RE 29121, edition: 2014-01, Bosch Rexroth AG... - Page 12 © This document, as well as the data, specifications and other information set Hydraulics forth in it, are the exclusive property of Bosch Rexroth AG. It may not be Zum Eisengießer 1 reproduced or given to third parties without its consent.
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