Bosch Rexroth 10 Series - A1 VO Series; DRS0;DNSO - Pressure Controller with Load-Sensing

Bosch Rexroth AG, RE 92650/2020-03-03
10 A1VO Series 10 | Axial piston variable pump
DRS0/DNSO – Pressure controller with load-sensing
DRS0/DNSO – Pressure controller with load-sensing
Inaddition tothe pressure controller function (DR), the
load-sensing controller works as load pressure guided flow
controller and adjusts the displacement ofthe pump tothe
quantity required by the consumer. The load-sensing
controller compares the pressure upstream the metering
orifice tothe one downstream the orifice and keeps the
pressure drop (differential pressure ∆p) occurring here and
thus the flow constant.
The swinging in by the pressure or the flow controller
always takes priority.
▶ DRS0
Setting range
1)
for pressure control 100 to250bar.
▶ DNS0
Setting range
1)
for pressure control 20 to100bar.
Notice
Version DRS0/DNSO does not have any connection
fromXtothe reservoir; thus, the LS must be unloaded in
thesystem.
▼ Characteristic curve DRS0
250
100
q
v min
q
v max
Working pressure p [bar]
Flow q
V
Hysteresis/pressure increase Δp
max
▼ Characteristic curve at variable rotational speed
q
V max
q
V min
n
min
n
max
Flow q
V
[L/min]
Rotational speed n
Hysteresis Δq
V
max
▼ Circuit diagram DRS0
S0
DR
L
2
L
1
B
1
S
X
1 The metering orifice (control block) is not included in the
scopeofdelivery.
Differential pressure ∆p
Standard setting: 14 bar. If another setting is required,
please state in the plain text.
Controller data
For data for the pressure controller DR, please refer
topage9. Maximum flow differential (hysteresis
andincrease) measured at drive speed n = 1500 rpm
andt
fluid
=50 °C
NG 18 28 35
Volume flow difference Δq
V max
3 l/min
Maximum pilot fluid consumption approx. 4 l/min
1) Inorder toprevent damage tothe pump and the system,
thepermissible setting range must not beexceeded.
Lower values on request