RE 18320-26/07.2023, Bosch Rexroth Oil Control S.p.A.
Technical data
Max. operating pressure 280 bar (4000 psi)
Max. flow 60 l/min (16 gpm)
Max. internal leakage
1)
15 drops/min.
Fluid temperature range -30 to 100 °C (-22 to 212 °F)
Installation torque 40 - 50 Nm (30 - 37 ft-lbs)
Weight 0.19 kg (0.42 lbs)
MTTFD 150 years see RE 18350-51
Cavity SUN T-21A
Adjustment according to ISO 4413 with sealed
adjustment screw to prevent oil
leakage during adjustment
Salt spray test 500h according to DIN EN ISO
9227:2017-07
Lines bodies and standard
assemblies
Please refer to section “Hydraulic
integrated circuit” or consult factory
Seal kit
2)
Code: RG08U4020110100
material no: R930001201
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 and
maximum 1.5 times catalogue max nominal setting.
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, 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 spring chamber is vented to 4, allowing
operation of all functions independent of back-pressure at 2.
Any back-pressure at 4 is additive to the pressure setting in
all functions. Valve design prevents spring going solid and
complete unscrewing during adjusting.
Counterbalance, 4 port vented
poppet type external drain, counterclockwise adjustment
Sun cavity interchange, T-21A
RE 18320-26
Edition: 07.2023
Replaces: 01.2021
VBSY-08U-RS 04.59.32 - X - 20 - Z
Characteristic curve
Flow Q
Pressure Δp
2
Bosch Rexroth Oil Control S.p.A., RE 18320-26/07.2023
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.
VBSY-08U-RS | Counterbalance, 4 port vented
Dimensions [mm (inches)]
Ordering code
Type Material number
04593203201500M R930081342
04593203202000M R930081380
Type Material number
045932032020V0M R930081381
Dimensions
Turn adjustment clockwise to decrease setting
and release load
35 (1.38)
59.5 (2.31) max
60 (2.36) max
OPTION
Protection cap orange
Mat. no. R900168151
Tamper proof cap black
Mat. no. R930092782
Series M to Z
unchanged performances and dimensions
Counterbalance, 4 port vented
poppet type external drain,
counterclockwise adjustment
00 Standard (Buna)
V0 Viton (FKM)
SPRINGS
Pilot ratio
Adj. press. range
bar (psi)
Pressure increase
bar/turn (psi/turn)
Std. setting
bar (psi)
cracking pressure
03 3:1
15 25-175 (350-2500) 70 (1015) 175 (2500)
20 70-280 (1000-4000) 109 (1581) 280 (4000)
20 SUN cavity interchange, T-21A
Preferred types
04.59.32 X 20 Z * *
Note: Special settings available with optional tamperproof cap.
Contact factory authorized representative for ordering code.
