DH6/10

Relief valve – Balanced piston type pilot operated (2)
With shock damping valve
X P T
Overview
This balanced piston type pilot operated relief
valve, which is a seat type relief valve,
regulates the highest pressure of the hydraulic
circuit and at the same time prevents overload
of the hydraulic equipment and drive machines
and sets pressure for control of the hydraulic
equipment. The relief valve with unloading
function is used for loading and unloading the
circuit pressure with electrical signals.
Type indication
RB
Features
1. As this valve has a larger seat diameter than
that of a general balance type relief valve, it
has good responsiveness and flow
resistance when unloaded is small.
2. Pressure override is small.
3. Operation is correct and both
responsiveness and stability are good.
4. The relief valve with unloading function can
perform shockless, smooth unloading if it is
used together with the shock damping
valve (refer to the section of the type
number index “ZNS5”).
5. As this valve adopts an unequal type
plunger, it opens when T port is
pressurized.
Relief valve – Balanced piston type pilot operated (2)
Relief valve - Balanced piston type pilot operated
Nominal dimension
35
Connection method
P
F
C
=
Gasket connection type
Flange connection type
Cartridge type
Series number: 10
Shape of pressure adjusting part
1 = Handle adjustment
2 = Thread adjustment (with cap)
Type of hydraulic oil
No symbol = Mineral based hydraulic oil
V = Phosphate ester based hydraulic oil
W = Fatty ester based hydraulic oil
= Water-glycol based hydraulic oil
Drain system
No symbol = Internal drain
Y = External drain
Vent port
No symbol
Without vent port
(in the case of flange connection type and cartridge type)
X With vent port
(in the case of gasket connection type)
Highest adjustment pressure
100 9.8MPa (100kgf/cm 2 )
315 30.9MPa (315kgf/cm 2 )
Hydraulic symbols
RB RBE RBE (with shock damping valve)
P
P
(X)
P
T
(Y)
T
(Y)
T
(Y)
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