E 5.920.1.1/01.13
134
Pressure Reducing Valve
Spool Type, Pilot-Operated
SAE-8 Cartridge – 350 bar
DR08P-01
60 l/min
350 bar
The DR08P is a pilot operated, spring-
loaded, spool type pressure reducing
valve. It maintains a constant outlet
pressure at port 1 regardless of pressure
variations at the inlet port 2.
If the pressure across port 1 rises and
exceeds the pre-set value, the pilot-
stage opens and oil ows from behind
the main spool to the tank port 3. The
resulting pressure differential causes the
main spool to move against the reset-
spring and allows oil to ow from port 2
to port 1. This continues until the system
pressure is equal to the spring tension
and the valve closes again.
If the pressure at port 1 suddenly
rises due to external force the valve
is relieved to tank port 3 (maximum
pressure relief).
Any pressure at port 3 is directly additive
to the valve pressure setting.
FEATURES
z External surfaces zinc-plated and corrosion-proof
z Hardened and ground internal valve components to ensure minimal wear and
extended service life
z Excellent stability throughout the entire ow range
z Low pressure drop due to CFD optimized ow path
z Screen protected metering orice enhances safety
z Optional spring ranges up to 345 bar
z Adjustable throughout ow range
z Quick response
z Compact design
FUNCTION
SPECIFICATIONS
Operating pressure: max. 350 bar
Nominal ow: max. 60 l/min
Operating pressure ranges: up to 35 bar
up to 60 bar
up to 125 bar
up to 230 bar
up to 345 bar
Internal leakage: < 0.5 l/min at 350 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)
Support rings: PTFE
Cavity: FC08-3
Weight: 0.17 kg
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MODEL CODE
DR08P-01 – C – N – 180 V 100
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
050 = 6 to 35 bar
090 = 6 to 62 bar
180 = 6 to 125 bar
330 = 6 to 228 bar
500 = 6 to 345 bar
Other pressure ranges on request
Adjustment option
V = Allen head (HEX 5/32")
H = Knob adjustment
F = Factory preset, non adjustable
K = Allen head (HEX 5/32") with protective cap
Cracking pressure setting
No details = no setting, spring relaxed
Pressure value = customer-specic cracking pressure on
request
CAVITY
FC08-3
DIMENSIONS
Form tools
Tool Part No.
Rougher FC08-3 175644
Reamer FC08-3 175645
millimeter (inch)
subject to technical modications
PERFORMANCE
Relieving pressure [bar]
Flow rate
Measured at ν = 34 mm²/s,T
oil
= 46 °C
thick
hex. SW7/8"
torque
25 - 30 Nm
SW 13
hex. G1/2
SW 4
hex. G5/32
Standard models
Model Code Part No.
DR08P-01-C-N-090V 3120532
DR08P-01-C-N-330V 3120534
DR08P-01-C-N-500V 3120535
*Standard in-line bodies
Code Part No. Material Ports Pressure
FH083-SB3 560922 Steel, zinc-plated G3/8 420 bar
FH083-AB3 3011427 Aluminium, 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
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.
500
330
180
90
50
