RE 18321-90/03.2016, Bosch Rexroth Oil Control S.p.A.
Description
The valve delivers priority flow, from 0 to max. available, on
demand to port 4, while compensating for load changes
downstream. In neutral, all input flow at 3 is given to the
priority port 4. Pressure at 4 is applied to the spool against
a spring force so that increasing pressure causes increasing
by-pass of input flow to port 2. Load sense pressure at port
1, obtained between the downstream control and the load,
assists the spring, and moves the spool back toward
supplying priority flow. Comparison between priority outlet
and LS pressure seeks a constant differential pressure over
the control valve. As load and flow control change, the
priority flow is increased or decreased to satisfy the
demand establishing that differential. An orifice connects
the priority outlet port and the spring chamber, giving a
small pressure assist to the spring, enhancing response
time to provide priority flow in the event that load sense
pressure momentarily drops.
Logic element, pressure compensator
with dynamic load sense
Common cavity, Size 10
RE 18321-90
Edition: 03.2016
Replaces: 01.2010VRLA-10A-D 04.84.10 - X - 85 - Z
Technical data
Max. operating pressure 350 bar (5000 psi)
Max. inlet flow 45 l/min. (12 gpm)
Max. priority flow 30 l/min. (8 gpm) for Z=05 version
40 l/min. (11 gpm) for Z=10 version
Fluid temperature range -30 to 100 °C (-22 to 212 °F)
Installation torque 41 - 47 Nm (30 - 35 ft-lbs)
Weight 0.22 kg (0.49 lbs)
Cavity CA-10A-4N (see data sheet 18325-70)
Lines bodies and standard
assemblies
Please refer to section “Hydraulic
integrated circuit” or consult factory
Seal kit
1)
Code: RG10A4010530100
material no: R901111373
Fluids Mineral-based or synthetics with
lubricating properties
at viscosities of 10 to 500 mm
2
/s (cSt)
Recommended degree of
fluid contamination
Nominal value max. 10µm (NAS 8) /
ISO 4406 19/17/14
Installation No restrictions
Other Technical Data See data sheet 18350-50
1) Only external seals for 10 valves
Characteristic curve
Flow - Q
Flow - QPressure - Δp
2
Bosch Rexroth Oil Control S.p.A., RE 18321-90/03.2016
Bosch Rexroth Oil Control S.p.A.
Via Leonardo da Vinci 5
P.O. Box no. 5
41015 Nonantola – Modena, Italy
Tel. +39 059 887 611
Fax +39 059 547 848
compact-hydraulics-cv@boschrexroth.com
www.boschrexroth.com/compacthydraulics
© This document, as well as the data, specifications and other information set
forth in it, are the exclusive property of Bosch Rexroth Oil Control S.p.a.. It
may not be reproduced or given to third parties without its consent. The data
specified above only serve to describe the product. No statements concerning
a certain condition or suitability for a certain application can be derived from
our information. The information given does not release the user from the
obligation of own judgment and verification. It must be remembered that our
products are subject to a natural process of wear and aging. Subject to change.
VRLA-10A-D | Logic element, pressure compensator
Dimensions [mm (inches)]
Ordering code
Dimensions
Type Material number
048410058510000 R930001195
048410068505000 R930001193
048410088510000 R930001196
048410098505000 R930001194
Type Material number
Logic element, pressure compensator
with dynamic load sense
Series 0/A to L
unchanged performances and dimensions
Version and options standard
SPRINGS
LS orifice diameter mm (inches)
Bias spring
bar (psi)
05 0.5 (0.02)
06 0.6 (0.02)
05
for X=06
and
X=09
5.5 (80) ± 20%08 0.8 (0.03)
09 0.9 (0.04)
85 Common cavity, Size 10
10
for X=05
and
X=08
10 (145) ± 15%
Preferred types
04.84.10 X 85 Z 00 *
