RE 18320-30/03.2016, Bosch Rexroth Oil Control S.p.A.
Technical data
Max. operating pressure 420 bar (6000 psi)
Max. flow 480 l/min (127 gpm)
Max. internal leakage
1)
15 drops/min.
Fluid temperature range -30 to 100 °C (-22 to 212 °F)
Installation torque 475 - 500 Nm (352 - 370 ft-lbs)
Weight 1.7 kg (3.7 lbs)
Cavity SUN T-19A
Lines bodies and standard
assemblies
Please refer to section “Hydraulic
integrated circuit” or consult factory
Seal kit
2)
Code: RG25U9020110100
material no: R930006268
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
Pressure setting: at least 1.3 times the load induced pressure.
1) At 70% of pressure setting
2) Only external seals for 10 valves
Description
When pressure at 2 rises above the spring bias pressure,
the check seat is pushed away from the piston and flow is
allowed from 2 to 1. When load pressure at 1 rises above
the pressure setting (turn counterclockwise to increase
setting - turn clockwise to decrease setting), the direct-
acting, differential area relief function is activated and flow
is relieved from 1 to 2. With pilot pressure at 3, the pressure
setting is reduced in proportion to the stated ratio of the
valve, until fully open with free-flow from 1 to 2. The valve
applies a balanced piston design allowing relief operation
at the valve setting independent of back-pressure at 2.
However, the piloted opening of the valve remains subject to
additive pressure at port 2.
Counterbalance, relief compensated
poppet type differential area, counterclockwise adjustment
Sun cavity interchange, T-19A
RE 18320-30
Edition: 03.2016
Replaces: 11.2015VBSP-25U-RS 04.54.18 - X - 50 - Z
Characteristic curve
Flow Q
Pressure Δp
2
Bosch Rexroth Oil Control S.p.A., RE 18320-30/03.2016
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.
VBSP-25U-RS | Counterbalance, relief compensated
Dimensions [mm (inches)]
Ordering code
Type Material number
045418255042000 R930006255
Type Material number
Dimensions
Turn adjustment clockwise to decrease setting
and release load
Series 0/A to L
unchanged performances and dimensions
Counterbalance, relief compensated,
poppet type differential area,
counterclockwise adjustment
Version and options standard
SPRINGS
Pilot ratio
Adj. press. range
bar (psi)
Pressure increase
bar/turn (psi/turn)
Std. setting
bar (psi)
cracking pressure
25 5:1
42 200-420 (2900-6000) 118 (1711) 350 (5000)
50 SUN cavity interchange, T-19A
Preferred types
04.54.18 X 50 Z 00 *
Note: Special settings available. Contact factory authorized
representative for ordering code.
