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Proportional Pressure
Relief Valve
Spool Type, Pilot-Operated
Normally Open
Cartridge Valve - 350 bar
PDBM10120AP-01
up to 120 l/min
up to 350 bar
The PDBM10120AP is a spool-type
pilot-operated proportional pressure relief
valve. When the pressure across port 1
rises and exceeds the value dened by
the electrical signal, the pilot-stage opens
and oil ows from behind the main spool
to the tank port 2. The resulting pressure
differential causes the main spool to move
against the reset-spring and allows oil to
ow from port 1 to port 2. The pressure to
be set at port 1 is innitely adjustable in
proportion to the electrical signal.
GENERAL
Long life and low noise level due to oil-immersed solenoid armature
Electro-magnetic actuation available for many electrical connection types
Minimal wear and long life due to hardened and polished control spool
Quick response
Low hysteresis and excellent stability throughout the ow range
Increased operating safety due to protective screen
Solenoid coils can be rotated through 360° and exchanged without opening
the hydraulic system
Surfaces are zinc-plated
Integral seals protect the solenoid from water penetration
Compact design allows space-saving installation in connection housings
and control blocks
FUNCTION
SPECIFICATIONS
Operating pressure: max. 350 bar
Flow rate: max. 120 l/min
Pressure setting ranges: up to 60 bar, up to 230 bar,
up to 350 bar
Control current range (at 20 °C): 1050 mA, 8.8 Ω/ 2100 mA, 2.2 Ω
Internal leakage: max. 170 cm³/min at 350 bar
Temperature range of operating uid: -20 °C to +120 °C
Ambient temperature range: -20 °C to +60 °C
Dither frequency: 160 Hz - 250 Hz
Switching time: On: approx. 50 ms, Off: approx. 30 ms
Hysteresis with dither: 2 - 4% at I
nom.
Repeatability: 1.5% of p
nom.
Hysteresis error: ≤ 2 % of l
nom.
Sensitivity: ≤ 1 % of l
nom.
Operating uid: hydraulic oil to DIN 51524 Part 1 and 2
Viscosity range: 10 mm²/s to 420 mm²/s is recommended
Filtration: max. permissible contamination level
of the operating uid to ISO 4406
Class 18/16/13 to 19/17/14
Mounting position: optional
Materials: valve body: high tensile steel
closing element: hardened and
polished steel
seals: NBR (standard)
FKM (optional)
Back-up rings in PTFE
Note:
The PDBM10120AP-01 can also be supplied with an emergency pressure adjustment.
This allows mechanical pressure adjustment of the valve if the electrical signal is
interrupted. This adjustment option should be used only in the case of electrical failure
since the manual setting would otherwise be additive to the electrical setting and the
danger of equipment damage could develop.
Cavity: 10120A
Weight: Complete valve: 436 g
Coil: 190 g
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PERFORMANCE
MODEL CODE
PDBM10120AP-01M-C-N-350-24PG-8.8
Designation
Proportional pressure
relief valve
Cavity
10120A = 2-way cavity
Function
P = pilot-operated
Type
01 = standard model
Emergencypressureadjustment
No details = without emergency press. adj.
M = emergency pressure adjustment
Typeofconnection
C = cartridge valve
Materialofseal
N = NBR
V = FKM
Pressuresettingrange
60 = up to 60 bar
230 = up to 230 bar
350 = up to 350 bar
Nominalvoltageofcoil
12 = 12 V
24 = 24 V
Coilconnector
PG = connector to DIN 43650
PL = with 2 ying leads, 457 mm long,
0.75 mm cross-section
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
10120A
Cartridgeformtools
Tool Stockno.
Countersink 166284
Reamer 166285
Tap 1002627
Plug gauge 166286
% of max. nom.
pressure
Measured at ν = 34 mm²/s, T
oil
= 46 °C
After loosening knurled nut,
coil can be rotated through
360° and removed
Flow rate
Pressure
% of max. ow rate
hex. SW 27
torque value
45
+10
Nm
Inlineconnectionhousing
Modelcode Stockno. Material Ports
R10120A-01X-01 395232 Steel, zinc-plated G 1/2
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
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 modications.
thick
tting depth
100% max. solenoid current
75% max. solenoid current
Solenoid de-energised
Standardmodels
Modelcode Stockno.
PDBM10120AP-01-C-N-60-12PG-2.2 3122655
PDBM10120AP-01-C-N-230-12PG-2.2 3122656
PDBM10120AP-01-C-N-350-12PG-2.2 3122657
PDBM10120AP-01-C-N-60-24PG-8.8 3122622
PDBM10120AP-01-C-N-230-24PG-8.8 3122621
PDBM10120AP-01-C-N-350-24PG-8.8 3105357
emergency press. adj.
torque value
10
+1
Nm
vent screw
torque value
0.9
+0,1
Nm
without emergency
press. adj.
torque value
4
+2
Nm
without emergency
press. adj.