RE 18318-14/03.2016, Bosch Rexroth Oil Control S.p.A.
Technical data
Max. operating pressure
port 1 (P) and 2 (T)
350 bar (5000 psi)
Max. pressure admitted
port 3 (Y)
350 bar (5000 psi)
Flow range 5 - 200 l/min (1.3 - 53 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 0.3 kg (0.66 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 position No restrictions
Other Technical Data See data sheet 18350-50
1) Measured at 200 bar (2900 psi)
2) Only external seals for 10 valves
Description
Flow is blocked from 1 to 2 until pressure increases to meet
the selected valve setting, lifting the conical, pilot-stage
poppet from its seat. This action exhausts oil above the main-
stage piston (spool type), allowing it to shift and provide
relief flow through 2 to tank. Pressure at 2 is additive to the
reliefsetting of the valve. With port 3 fully drained to tank,
the minimum relief setting of 2 bar (30 psi) is attained. To
use the remote control feature, pressure at 3 may be varied
externally in control of the main relief setting up to the
selected maximum spring adjustment.
Relief, pilot operated spool type
external pilot
Common cavity, Size 12
RE 18318-14
Edition: 03.2016
Replaces: 09.2009VSPX-12A 04.13.08 - X - 57 - Z
Characteristic curve
Flow Q
Pressure Δp
2
Bosch Rexroth Oil Control S.p.A., RE 18318-14/03.2016
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.
VSPX-12A | Relief, pilot operated spool type
Dimensions [mm (inches)]
Type Material number
041308035710000 R930000359
041308035720000 R930000360
041308035735000 R930000361
Type Material number
Dimensions
Leakproof hex. socket screw
OPTION
Tamper resistant cap
ordering code: 11.04.23.002
Mat. no. R930000752
Ordering code
04.13.08 X 57 Z 00 *
Series 0/A to L
unchanged performances and dimensions
Relief, pilot operated spool type
external pilot
Version and options standard
SPRINGS
Adjustments
Adj. press. range
bar (psi)
Pressure increase
bar/turn (psi/turn)
Std. setting
bar (psi)
Q=5 l/min
03 Leakproof hex. socket screw
10 35-140 (500-2000) 48 (696) 100 (1450)
57 Common cavity, Size 12
20
70-280 (1000-4000) 88 (1276) 200 (2900)
35 140-420 (2000-6000) 140 (2030) 350 (5000)
Preferred types
Note: Special settings available. Contact factory authorized representative
for ordering code.
