RE 18318-35/04.2022, Bosch Rexroth Oil Control S.p.A.
Technical data
Max. operating pressure
port 1 (P)
420 bar (6000 psi)
Max. pressure admitted
port 2 (T)
50 bar (725 psi)
Max. flow 100 l/min (26 gpm)
Max. internal leakage
1)
15 drops/min.
Fluid temperature range -30 to 100 °C (-22 to 212 °F) (Buna N)
-20 to 120 °C (-4 to 248 °F) (Viton)
Installation torque
2)
90 Nm (67 ft-lbs)
Weight 0.17 kg (0.37 lbs)
MTTFd 150 years see RE 18350-51
Special cavity FB (see data sheet 18325-75)
Lines bodies and standard
assemblies
Please refer to section “Hydraulic
integrated circuit” or consult factory
Seal kit (Buna N) Code: RG16R2010520100
material no: R931002592
Seal kit (Viton) Code: RG16R2040520100
material no: R931002593
Fluids Mineral-based or synthetics with
lubricating properties
at viscosities of 10 to 380 mm
2
/s (cSt)
Recommended degree of
fluid contamination
Nominal value max. 10µm (NAS 8) /
ISO 4406 20/18/15
Installation position No restrictions
Other Technical Data See data sheet 18350-50
Without surface protection In case of need of surface protection,
please consult factory.
1) At 80% of pressure setting.
2) Torque value valid for installation in cast iron and steel manifolds.
In case of different body materials, please consult factory.
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 poppet (low-leakage, seat type), allowing it to
shift and provide relief flow through 2 to tank. Pressure at 2
is additive to the relief setting of the valve.
The anti-cavitation function makes up for lacking oil volumes
caused, for example, by leakage when pressure valves
respond or in the case of leading loads. If the pressure at
main port 1 is lower than the one at main port 2, the spool
will be lifted out of its seat. Hydraulic fluid flows from main
port 2 to main port 1.
Pressure relief pilot operated poppet type
and anti-cavitation valve
Special cavity, FB
RE 18318-35
Edition: 04.2022
Replaces: 01.2019VMR1-16 VMR1.100.NG
Characteristic curve
Flow Q
Pressure Δp
Flow Q
Pressure Δp
2
Bosch Rexroth Oil Control S.p.A., RE 18318-35/04.2022
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.
VMR1-16 | Pressure relief pilot operated poppet type, and anti-cavitation valve
Dimensions [mm (inches)]
Type Material number
VMR1.100.NG.020 R931002529
VMR1.100.NG.030 R931002539
Type Material number
Dimensions
OPTION
Protective cap orange
Mat. no. R900168151
Ordering code
VMR1.100.NG *
Pressure relief pilot operated poppet type
and anti-cavitation valve
SPRINGS
O-RING
Adj. press. range
bar (psi)
Pressure increase
bar/turn (psi/turn)
Material
020 100-420 (1450-6090) 300 (4350)
Buna N
(NBR)
030 100-420 (1450-6090) 300 (4350)
Viton
(FKM)
Preferred types
* Valves are delivered without specifice pressure set at the
factory and with adjustment device not tighten. Fine setting to
be done by customer. For case of request of factory set valve,
please consult factory.
