E 5.991.2.0/12.10
524
Proportional Pressure Relief Valve
SAE 12-Cartridge - 350 bar
PDB12P-01
Spool Type – Pilot Operated
200 l/min
350 bar
The PDB12P is a two stage spool type
proportional pressure relief valve. If
the pressure at port 1 rises above the
setting dened by the electrical control
signal, the pilot stage opens and allows
ow from the back of the main piston to
port 2. The resulting pressure imbalance
causes the main piston to open against
the return spring and allows ow from
port 1 to port 2. As a function of the
electrical signal the relief pressure at
port 1 can be changed steplessly.
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. 200 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 - 250Hz
Response time: On: approx. 50 ms, Off: approx. 30 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 mm²/s
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 PDB12P 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 interrupted. 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: FC12-2
Weights: Valve complete: 550 g
Coil only: 230 g
E 5.991.2.0/12.10
525
perFOrmaNce
mOdel cOde
PDB12P-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
SB6 = 3/4 BSP ports, steel body
SS12 = SAE-12 ports, steel body
AB6 = 3/4 BSP ports, aluminium body
AS12 = SAE-12 ports, aluminium body
Seals
N = NBR
V = FKM
Pressurerange
87 = 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 (DIN 43650)
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
FC12-2
% of Max. Relieving 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
Relieving Pressure
% of Max. Control Current
1 1/4'' Hex
Torque 50-60 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 PartNo
Rougher FC12-2 in preparation
Finisher FC12-2 in preparation
millimeter (inch)
subject to technical modications
*StandardLineBodies
Code PartNo Material Ports Pressure
FH122-SB6 3053782 Steel, zinc-plated 3/4 BSP 420 bar
FH122-SS12 3053772 Steel, zinc-plated SAE-12 420 bar
FH122-AB6 3053843 Aluminium, clear anodized 3/4 BSP 245 bar
FH122-AS12 3053845 Aluminium, clear anodized SAE-12 245 bar
Standardmodels
Modelcode Materialno.
PDB12P-01-C-N-87-12PG-2.2 3144462
PDB12P-01-C-N-330-12PG-2.2 3144463
PDB12P-01-C-N-500-12PG-2.2 3144464
PDB12P-01-C-N-87-24PG-8.8 3144465
PDB12P-01-C-N-330-24PG-8.8 3144466
PDB12P-01-C-N-500-24PG-8.8 3144467
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 ν = 34 mm²/s, T
oil
= 46 °C