Bosch Rexroth A7VO 63 Series Manual page 19

HD1G – Proportional hydraulic control with pressure
cut-off, remotely controlled
A separate sequence valve with port plate provides the
pressure cut-off function. The valve is arranged separate
from the pump; in this connection, you should not exceed
the single line length of 5 m. The valve is supplied with high
pressure from port A of the pump. The system feeds back
1
via port X
the control power of the pump into the valve
3
and at port A of the sequence valve's port plate diverts it
into the reservoir; if the set pressure command value is
exceeded, this adjusts the pump back to V
▶ Pressure cut-off setting range 50 to 315 bar
When ordering, state the pressure cut-off setting in plain
text.
Notes
▶ Port A from the sequence valve must be returned to
the reservoir (cooler).
▶ Any pressure-relief valve included in the system to limit
the max. pressure must be set to a cracking pressure
at least 20 bar above the controller setting.
You must order the sequence valve and the port plate
separately.
▶ Sequence valve (1): DZ5DP2-1X/315XYMSO20
(Material number R900490554)
▶ Port plate (2): G 115/1
(Material number R900424379)
▼ Characteristic curve HD1G positive control
.
g min
▼ Schematic HD1G
U
R
2
Axial piston variable pump | A7VO Series 63
HD – Proportional hydraulic control
max
315
50
min
q flow q [l/min]
V min V
R
1
V
g min
V
g max
RE 92202/02.2015, Bosch Rexroth AG
19
q
V max
1
2
P B(X) A T
M
1
B(A)
A
1
T
1
X
3
S
Y
3
X
1