RE 18321-61/09.2016, Bosch Rexroth Oil Control S.p.A.
Description
When pressure at 1 rises above the selected spring bias
pressure against the spool, the valve shifts to allow flow
from 1 to 2. Pilot pressure at 3 is additive to the spring bias
pressure. The valve may be used in switching or
compensation type applications.
Logic element, flow and pressure control
with external pilot
Common cavity, Size 12
RE 18321-61
Edition: 09.2016
Replaces: 03.2016VLST-12A 04.84.01 - X - 57 - Z
Technical data
Max. operating pressure 350 bar (5000 psi)
Max. fow 120 l/min. (32 gpm)
Max. internal leakage
1)
350 cm
3
/min. (21 cu.in./min.)
Fluid temperature range -30 to 100 °C (-22 to 212 °F)
Installation torque 81 -95 Nm (60 - 70 ft-lbs)
Weight 0.2 kg (0.44 lbs)
Cavity CA-12A-3C (see data sheet 18325-70)
Lines bodies and standard
assemblies
Please refer to section “Hydraulic
integrated circuit” or consult factory
Seal kit
2)
Code: RG12A9010520100
material no: R901111379
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) Measured at 200 bar (2900 psi)
2) Only external seals for 10 valves
Characteristic curve
Flow Q
Pressure Δp
2
Bosch Rexroth Oil Control S.p.A., RE 18321-61/09.2016
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, specications 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
specied 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 verication. It must be remembered that our
products are subject to a natural process of wear and aging. Subject to change.
VLST-12A | Logic element, flow and pressure control
Dimensions [mm (inches)]
Ordering code
Dimensions
Fixed setting
Handknob and locknut
* Version with locking option: with adjustable screw
fully in, the cartridge is blocked in closed configuration;
suggested for open/closed center circuits.
Type Material number
048401005704000 R930000049
048401005708000 R930000050
048401005711000 R930006101
Type Material number
048401045704000 R930053744
Logic element,
flow and pressure control, with
external pilot
Series 0/A to L
unchanged performances and dimensions
Version and options standard
SPRINGS
Adjustaments
Std. setting
bar (psi)
Pressure
increase
bar/turn (psi/
turn)
Bias spring
bar (psi)
00 Fixed setting
04 Handknob and locknut
for
X= 00
04 - - 4 (60) ± 20%
08
- - 8 (116) ± 15%
11 - - 11 (160) ± 15%
57 Common cavity, Size 12
for
X= 04
04 * 8 (116) 0.8 (12) 4-10 (60-145)
Preferred types
04.84.01 X 57 Z 00 *
