Program Information Mobile Hydraulics, Mobile ... - Bosch Rexroth AG

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Compact Hydraulics
Cartridge Valves: Counterbalance Valves
Counterbalance valves are also
known as over-centre valves or motion
control valves.
They are designed to control the
motion of overrunning loads.
Technical requirements:
- Load holding at "zero leakage"
- Excellent control of negative
loads during operations and
throughout flow range
- Quick response time
- Pressure relief protection against
overloads
- Energy saving
- Tolerance to oil contamination
- Compact design
The check valve function allows
free flow from the directional valve
(port 2); when load pressure at
port 1 rises above the pressure setting,
the relief function is activated
and flow is relieved from 1 to 2.
Pressure compensated counterbalance
valves are available in different
versions: relief compensated,
3-ports atmospherically vented, 4ports
vented.
Fixed setting versions available.
Special setting versions available.
VBSN standard
Flow l/min up to 320
Max operating pressure bar 420
Pilot Ratio 1.5 to 9
Cavity common industry and market interchange
VBSP relief compensated
Flow l/min up to 320
Max operating pressure bar 420
Pilot Ratio 3 and 4
Cavity common industry and market interchange
VBST atmospherically vented
Flow l/min up to 320
Max operating pressure bar 420
Pilot Ratio 1,5 to 4
Cavity common industry and market interchange
VBSY 4-ports vented
Flow l/min up to 240
Max operating pressure bar 420
Pilot Ratio 1,5 to 4
Cavity market interchange
Detailed information:
RE 00162-02