Page 618 - Hydrover-hydraulic-integrated-circuits-catalogue

COMPONENTS

Pressure relief pilot operated poppet type
and anti-cavitation valve

Special cavity, FC
RE 18318-37
Edition: 06.2017
VMR2-22-FC VMR2.240.NG Replaces: 11.2016

Technical data
Max. operating pressure 420 bar (6000 psi)
port 1 (P)
Max. pressure admitted 50 bar (725 psi)
port 2 (T)
Max. flow 240 l/min (63 gpm)
Max. internal leakage 1) 45 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) 100 Nm (74 ft-lbs)
Weight 0.24 kg (0.53 lbs)
MTTFd 150 years see RE 18350-51
Description
Flow is blocked from 1 to 2 until pressure increases to meet Special cavity FC (see data sheet 18325-75)
the selected valve setting, lifting the conical, pilot-stage Lines bodies and standard Please refer to section “Hydraulic
poppet from its seat. This action exhausts oil above the assemblies integrated circuit” or consult factory
main-stage poppet (low-leakage, seat type), allowing it to Seal kit (Viton) Code: RG22R2040520100
shift and provide relief flow through 2 to tank. Pressure at 2 material no: R930052887
is additive to the relief setting of the valve. Fluids Mineral-based or synthetics with
The anti-cavitation function makes up for lacking oil volumes lubricating properties 2
caused, for example, by leakage when pressure valves at viscosities of 10 to 380 mm /s (cSt)
respond or in the case of leading loads. If the pressure at Recommended degree of Nominal value max. 10µm (NAS 9) /
main port 1 is lower than the one at main port 2, the spool fluid contamination ISO 4406 20/18/15
will be lifted out of its seat. Hydraulic fluid flows from main Installation position No restrictions
port 2 to main port 1. 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.
Characteristic curve

Pressure Δp Pressure Δp

Flow Q Flow Q

RE 18318-37/06.2017, Bosch Rexroth Oil Control S.p.A.

618 General catalogue September 2023 edition