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Proportional Pressure
Reducing Valve
SAE 8-Cartridge – 350 bar
PDR08P-01
Spool Type – Pilot Operated
60 l/min
350 bar
The PDR08P is a two stage spool type
proportional pressure reducing valve.
If the pressure at port 1 rises above the
setting dened by the electrical control
signal, the pressure at 2 is metered off to
maintain the regulated setting.
3 is vented to tank. As a function of the
electrical signal the regulated pressure
at port 1 can be changed steplessly.
Any pressure at port 3 is additive to the
pressure setting.
Features
All surfaces zinc-plated and corrosion proof
All valve parts made of high-strength steel with hardened and ground
components to ensure minimal wear and to extend service life
Rigid design using one-piece body minimizes the effect of eccentricity and
maximizes reliability
Waterproof design standard
Wide variety of connectors available
Excellent stability throughout ow range
Excellent dynamic performance
Low pressure drop by CFD optimized ow-path
Screen protected measuring orice enhances safety
FuNctION
specIFIcatIONs
Operating pressure: max. 350 bar
Nominal ow: max. 60 l/min
Operating pressure ranges: up to 60 bar, up to 230 bar, up to 350 bar
Control current range: 1050 mA, 8.8 Ω / 2100 mA, 2.2 Ω
Internal leakage: less than 0.5 l/min at 350 bar
Media operating temp. range: -20 °C to +120 °C
Ambient temp. range: -20 °C to +60 °C
Dither frequency: 160 Hz - 250 Hz
Response time: On: approx. 60 ms, Off: approx. 40 ms
Hysteresis with dither: 2 - 4 % of maximum control current
Repeatability: 1.5 % of maximum pressure range
Reversal error: ≤ 2 % of maximum control current
Response sensitivity: ≤ 1 % of maximum control current
Fluids: Mineral-based or synthetics with
lubricating properties
Viscosity: 7.4 to 420 cSt
Filtration: Class 18/16/13 up to 19/17/14 according
to ISO 4406 or cleaner
Installation: no orientation restrictions
Material: Valve body: carbon steel
Spool: carbon steel
Seals: NBR (standard)
FKM (optional)
Coil: Steel / Polyamide
Notes:
The PDR08P can also be supplied with an emergency pressure adjustment (version -01M).
This allows a mechanical pressure adjustment of the valve if the electrical signal is interrup-
ted. This adjustment should be used only in the case of electrical failure since the manual
setting would be additive to the electrical setting and the danger of equipment damage could
develop.
In order to achieve optimal function, any trapped air should be vented with the bleed
screw on the face of the tube (not tted to version -01M).
Cavity: FC08-3
Weights: Valve complete: 450 g
Coil only: 230 g
E 5.990.1.0/12.10
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perFOrmaNce
mOdel cOde
PDR08P–01M-C-N-330-24PG-8.8
Basicmodel
Option
Omission = No option
M = Emergency pressure adjustment
BodyandPorts*
C = Cartridge only
SB3 = 3/8 BSP ports, steel body
SS6 = SAE-6 ports, steel body
AB3 = 3/8 BSP ports, aluminium body
AS6 = SAE-6 ports, aluminium body
Seals
N = NBR
V = FKM
Pressurerange
087 = up to 60 bar
330 = up to 230 bar
500 = up to 350 bar
Coilvoltage
12 = 12 V (2.2 Ω)
24 = 24 V (8.8 Ω)
Coilconnector
PG = DIN Connector (EN 175301-803)
PL = Leadwires (2) – 457 mm (18") long
PN = Deutsch Connector DT04-2P-EP04 (axial)
PU = AMP Junior Timer, 2 pole, axial
Coilresistance
2.2 = 2.2 Ω (12 V)
8.8 = 8.8 Ω (24 V)
dImeNsIONs
caVItY
FC08-3
% of Max. Regulating Pressure
measured at ν = 34 mm²/s, T
oil
= 46 °C
Emergency pressure
adjustment
Torque 10-11 Nm
After loosening knurled nut,
coil can be rotated through
360 ° and removed.
Flow rate
Regulating Pressure
% of Max. Control Current
7/8'' Hex
Torque 25-30 Nm
thick
75 % Max. control current
50 % Max. control current
No control current
HYDACFluidtechnikGmbH
Justus-von-Liebig-Str.
D-66280Sulzbach/Saar
Tel: 0 68 97 /509-01
Telefax. 0 68 97 /509-598
E-Mail: utec@hydac.com
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 modications.
NOTE
Millimeter (inch)
Subject to technical modications.
Formtools
Tool Stockno.
Rougher FC08-3 175644
Finisher FC08-3 175645
*StandardLineBodies
Code Stockno. Material Ports Pressure
FH083-SB3 560922 Steel, zinc-plated 3/8 BSP 420 bar
FH083-SS6 560920 Steel, zinc-plated SAE-6 420 bar
FH083-AB3 3011427 Aluminium, clear anodized 3/8 BSP 245 bar
FH083-AS6 3011424 Aluminium, clear anodized SAE-6 245 bar
Standardmodels
Modelcode Stockno.
PDR08P-01-C-N-87-12PG-2.2 3147475
PDR08P-01-C-N-330-12PG-2.2 3147476
PDR08P-01-C-N-500-12PG-2.2 3147477
PDR08P-01-C-N-87-24PG-8.8 3147488
PDR08P-01-C-N-330-24PG-8.8 3147489
PDR08P-01-C-N-500-24PG-8.8 3147490
Venting Screw
Torque 0.9-1 Nm
(without emergency
pressure adjustment)
(without emergency
pressure adjustment)
Torque 4-6 Nm
100 % Max. control current
measured at 34 cSt, T
oil
= 46 °C
Millimeter (inch)
Subject to technical modications.