DH6/10

Pressure reducing valve – Balanced piston type pilot operated
PRB
Primary pressure pilot type
Overview
This balanced piston type pilot operated pressure
reducing valve is used for reducing the pressure
of the hydraulic circuit partly. Even if the pressure
of the main circuit on the primary side fluctuates,
it is possible to keep the circuit pressure on the
secondary side (low pressure side) at the
specified pressure.
Type indication
PRB
Features
1. As nominal dimension #10 leads the pilot
pressure from the secondary side, the structure
is compact.
2. As nominal dimension #20 and 30 lead the
pilot pressure from the primary side, the
maximum flow rate is large and besides they
can control the secondary pressure stably.
3. When the remote control valve is
connected to the drain port, the secondary
pressure can be controlled by remote
control.
Pressure reducing valve – Balanced piston type pilot operated
Pressure reducing valve
– Balanced piston type pilot operated
Nominal dimension
10, 20, 30
Connection method
P = Gasket connection type
Series number: 10
Shape of pressure adjusting part
1 = Handle adjustment
2 = Thread adjustment (with cap)
3 = Handle with key adjustment
Hydraulic symbols
Without check valve
With check valve
Specifications
Type of hydraulic oil
No symbol
V
W
No symbol
C
=
=
=
Drain system
Y = External drain
Mineral based hydraulic oil
Phosphate ester based hydraulic oil
Fatty ester based hydraulic oil
Water-glycol based hydraulic oil
Check valve provided or not
= Without check valve
= With check valve
Highest adjustment pressure
100 = 9.8MPa100kgf/cm 2
315 = 30.9MPa315kgf/cm 2
Nominal dimension
Maximum working pressure (port A, B, Y)MPa (kgf/cm 2 )
Maximum flow rate L/min
Highest adjustment pressure MPa (kgf/cm 2 )
Mass kg
(Note) As the minimum adjustment pressure varies depending on the flow rate, refer to “Minimum adjustment
pressure characteristics on the secondary side”.
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