maximum approx. 3
▼ Circuit diagram DRG nominal size 18 to 100
Characteristic curve valid at n1 = 1500 rpm and θﬂuid = 50 °C.
DRG – Pressure controller, remote controlled
For the remote controlled pressure controller, the LS pres-
sure limitation is performed using a separately arranged
pressure relief valve. Therefore any pressure control value
under the pressure set on the pressure controller can be
regulated. Pressure controller DR see page 11.
A pressure relief valve is externally piped up to port X for
remote control. This relief valve is not included in the scope
of delivery of the DRG control.
When there is diﬀerential pressure of 20 bar Δp (standard
setting), the quantity of control ﬂuid at the port is X
approx. 1.5 l/min. If a diﬀerent setting (range 10 to 22 bar)
is required, please state in plain text.
As a separate pressure relief valve (1) we recommend:
▶ a direct operated, hydraulic or electric proportional one,
suitable for the control ﬂuid mentioned above.
1 The separate pressure relief valve and the line are not
included in the scope of delivery.
2 Remote controlled pressure cut-oﬀ (G).
3 Pressure controller (DR)
The max. length of piping should not exceed 2 m.
▶ Basic position in depressurized state:Vg max
▶ Setting range1) for pressure control 20 to 280 bar (3).
Standard is 280 bar.
▶ Setting range for diﬀerential pressure 10 - 22 bar(2)
Standard is 20 bar.
Unloading port X to the reservoir results in a zero stroke
(standby) pressure which is approx. 1 to 2 bar higher than
the deﬁned diﬀerential pressure ∆p, however system inﬂu-
ences are not taken into account.
▼ Circuit diagram, size 140
▼ Characteristic curve DRG
Controller data DRG
1) In order to prevent damage to the pump and the system,
the permissible setting range must not be exceeded.
The range of possible settings at the valve is higher.
maximum approx. 4.5