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Pressure Reducing Valve
Spool Type, Direct Acting
SAE-8 Cartridge – 420 bar
DR08-01
15 l/min
420 bar
The DR08 is a direct-acting, spring-
loaded, spool type pressure reducing
valve. Its function is to maintain a
constant pressure at the consumer.
In the normal position, the pressure port
2 is connected to the consumer port 1.
The pressure building at the consumer
acts on the face of the control spool
and moves it upwards against the set
spring force. Therefore the ow at port
2 is restricted enough to satisfy the
consumer's demand without increasing
the pressure.
In addition the valve has a pressure
relieving function: If the pressure across
consumer port 1 rises above the control
pressure due to external force, the
control piston is pushed further against
the spring and relieves the consumer to
tank port 3.
FEATURES
z External surfaces zinc-plated and corrosion-proof
with integral maximum stroke limitation
z Adjustable throughout ow range
z Hydrodynamic damping
z Optional spring ranges up to 207 bar
z Quick response
z Compact design
z Hardened and ground internal valve components to ensure minimal wear and
extended service life
FUNCTION
SPECIFICATIONS
Operating pressure: max. 420 bar
Nominal ow: max. 15 l/min
Operating pressure ranges: to 35 bar
to 83 bar
to 152 bar
to 207 bar
Media operating temperature range: min. -30 °C to max. +100 °C
Ambient temperature range: min. -30 °C to max. +100 °C
Operating uid: Hydraulic oil to DIN 51524 Part 1 and 2
Viscosity range: min. 7.4 mm²/s to max. 420 mm²/s
Filtration: Class 21/19/16 according to ISO 4406 or
cleaner
MTTF
d
: 150 years (see "Conditions and
instructions for valves" in brochure 5.300)
Installation: No orientation restrictions
Material Valve body: free-cutting steel
Spool: hardened and ground
steel
Seals: NBR (standard)
FKM (optional, media
temperature range
-20 °C to 120 °C)
Cavity: FC08-3
Weight: 0.24 kg
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PERFORMANCE
MODEL CODE
DR08-01 – C – N – 220 V 180
Basic model
Pressure reducing valve UNF
Body and ports*
C = cartridge only
SB3 = G3/8 ports, steel body
AB3 = G3/8 ports, aluminium body
Seals
N = NBR
V = FKM
Setting pressure range
027 = 2 to 19 bar
050 = 3 to 35 bar
120 = 11 to 83 bar
220 = 15 to 152 bar
300 = 20 to 207 bar
Other pressure ranges on request
Adjustment option
V = Allen head (HEX 5/32")
H = knob adjustment
F = factory preset, non adjustable
K = with protective cap
Pressure setting
No details = no setting, spring relaxed
Pressure value = setting specied by customer
CAVITY
FC08-3
DIMENSIONS
Form tools
Tool Part No.
Countersink FC08-3 175644
Reamer FC08-3 175645
Standard models
Model code Part No.
DR08-01-C-N-027V 3107709
DR08-01-C-N-050V 560752
DR08-01-C-N-120V 560456
DR08-01-C-N-220V 560454
DR08-01-C-N-300V 3022444
*Standard in-line bodies
Code Part No. Material Ports Pressure
FH083-SB3 560922 Steel, zinc-plated G3/8 420 bar
FH083-AB3 3011427 Aluminium, clear anodized G3/8 210 bar
Seal kits
Code Material Part No.
FS083-N SEAL KIT NBR 3054795
FS083-V SEAL KIT FKM 2591059
millimeter (inch)
subject to technical modications
hex. 5/32"
hex. 9/16"
hex. 1"
Torque 25
+5
Nm
thick
Pressure rise
Flow rate
Measured at ν = 34 mm²/s, T
oil
= 46 °C
(Relieving) (Reducing)
millimeter (inch)
subject to technical modications
HYDAC Fluidtechnik GmbH
Justus-von-Liebig-Str.
D-66280 Sulzbach/Saar
Tel: 0 68 97 /509-01
Fax: 0 68 97 /509-598
E-Mail: utec@hydac.com
NOTE
The information in this brochure relates to the
operating conditions and applications described.
For applications or operating conditions not
described, please contact the relevant
technical department. Subject to technical
modications.
