E 5.168.3/12.10
486
up to 80 bar
up to 10 l/min
Proportional Pressure
Reducing Valve
PDM08130
Control electronics Connection housings
Cartridge valves
E 5.168.3/12.10
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1. DESCRIPTION
1.1. GENERAL
According to DIN-ISO 1219,
HYDAC proportional pressure
reducing valves, type PDM,
are control valves, used in oil
hydraulic systems, which in
the main provide a constant
outlet pressure where there is
a variable inlet pressure. The
outlet pressure to be controlled is
determined by the current signal
which is supplied by appropriate
control electronics and which
affects an actuating solenoid.
This solenoid is a pressure-tight,
wet-pin type and has the following
advantages:
– completely sealed
– low noise level and long service
life due to oil damping
– good heat dissipation via the oil
– solenoid coil can be turned
through 360°, as well as reversed
and removed without having to
open the hydraulic system.
The control electronics for the
valve are available on request in
three versions and are pre-set
in accordance with the relevant
valve details. The valve design
also allows other commercially
available control systems to be
used, however, in this case the
valve characteristics may differ
from the details given in the
brochure.
The HYDAC proportional pressure
reducing valve PDM is designed
as a compact cartridge valve and
has the following advantages:
– safety type and surface protection
make it suitable for use in the
mobile sector
– excellent control and stability
properties
– low hysteresis
– four pressure ranges mean
excellent system adjustment
– standardised installation
dimensions to ISO 7789
– space-saving installation in
housings, control blocks etc.
– simple tting and replacement
– various connection housings
available for inline mounting
If the outlet pressure falls below
the pre-set pressure because the
user unit is relieved, the solenoid
armature pushes the control spool
down and the control process
starts again. The maximum outlet
pressure that can be achieved
is therefore determined by the
solenoid force (pressure range).
Outlet pressure relief from 1 to 3:
If the pressure across port 1 rises
above the pre-set pressure, the
control spool is pushed up by
the solenoid armature and the
connection from 1 to 3 is opened.
This controls the pressure across
port 1. If the controlling current
is interrupted, the control spool
is pushed up by the pressure
across port 1 and by the return
spring. This means that port 1
is connected to port 3 and the
pressure across port 1 falls to
tank level.
1.3. APPLICATIONS
In oil hydraulic systems for
– control of couplings in gearboxes
– control of couplings for power
take off shafts with variable
torque progression
– specic modulation of pressure
increase and decrease
– remote adjustment of pressure
– automatic or manual adjustment
of secondary circuit pressures to
the required values
– control of pressure performance
– pilot operation of hydraulic valves
and logic elements
– control of adjustment devices
on pumps and in pump control
circuits
1.4. RECOMMENDATIONS
– port connections to be taken into
account (see point 2.1.7.)
– torque ratings to be taken into
account (see point 4.1.)
In order to guarantee correct
operation and a long service
life of the valve, the following
recommendations should be
adhered to:
– vent valve during commissioning:
ush in preferred mounting
position (solenoid pointing
downwards) and operate several
times.
– take max. permissible
contamination level of operating
uid into account
(see point 2.2.7.)
1.2 FUNCTION
HYDAC PDM proportional
pressure reducing valves are
direct-operated spool valves in
a 3-way conguration, i. e. with
outlet pressure relief. The valves
consist essentially of a valve
body, a hardened and polished
control spool, a return spring and
the solenoid coil with solenoid
armature for electrical operation.
Pressure reducing function
from 2 to 1:
In the initial position (no current
signal) the valve is closed on
the inlet side (port 2) and is
connected on the outlet side
(port 1) to the tank (port 3).
If a current signal is applied, the
solenoid armature presses onto
the control spool with a force
corresponding to the amount of
controlling current. This pushes
the control spool down against
the return spring and the oil ows
from port 2 to port 1. A user unit,
eg a cylinder, causes a build-up
of pressure across port 1 which
acts on the surface of the control
spool and produces a counter
force to the solenoid force, which
moves the control spool up again.
This reduces the ow from 2 to 1
until the pressure across port 1
is equal to the solenoid force and
therefore the pre-set pressure
value is as per the current signal.
If the user unit does not require
any more operating uid
(eg at the end of the cylinder
stroke) then the control spool
moves up further and shuts off
the inlet ports.
A solenoid armature
B solenoid coil
C valve housing
D control spool
E return spring
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2. TECHNICAL
SPECIFICATIONS
2.1. GENERAL
2.1.1 Designationandsymbol
Proportional pressure
reducing valve
2.1.3 Typeofconstruction
Spool valve, direct-operated
2.1.4 Typeofmounting
Cartridge valve
2.1.5 Mountingposition
Optional, solenoid coil pointing
downwards preferred
(see point 1.4.)
2.1.6 Weight
0.4 kg
2.1.7 Flowdirection
From 2 to 1: controlled ow
From 1 to 3: outlet pressure relief
2.1.8 Ambienttemperaturerange
Min. - 20 °C
Max. + 50 °C
2.1.9 Materials
Control spool: hardened steel
Valve body: free-cutting steel
Seals: compatible with hydraulic
oil to DIN 51524, Part 1 and 2
Standard models
Please quote stock no. when ordering.
Delivery for non-standard models is longer and the price is higher.
2.1.2 Modelcode
(also order example) PDM 08130 - 01 X - 60 - G 24 - Z4
Proportional pressure reducing valve
Installation dimensions
Type
01 = technical specications
as per this brochure
Series
(determined by manufacturer)
Pressure range
15 = up to 15 bar
25 = up to 25 bar
45 = up to 45 bar
60 = up to 60 bar
Nominal voltage
G 12 = 12 V DC
G 24 = 24 V DC
Type of solenoid
no details = connection to DIN 43650
T = Junior AMP Timer 2-pole, at plug 2.8 x 0.8 to DIN 46244
Others on request
Type of connection, electrical
no details = no plug
Z4 = plug to DIN 43650-AF2-PG11 (on DIN 43650 connection only)
2.1.10Typeofconnection
Suitable connection housings with
installation dimensions 08130 are
available.
See separate housing brochure
no.: E 5.252../..
2.1.11Nominalsize
NG = 08
Stock no. Model code
716 312 PDM08130-01X-15-G24T
716 320 PDM08130-01X-15-G24-Z4
716 313 PDM08130-01X-25-G24T
716 321 PDM08130-01X-25-G24-Z4
716 314 PDM08130-01X-45-G24T
716 322 PDM08130-01X-45-G24-Z4
716 315 PDM08130-01X-60-G24T
716 323 PDM08130-01X-60-G24-Z4
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2.2. HYDRAULICDETAILS
2.2.1 Nominalpressure
Inlet (port 2) ... up to 80 bar
Outlet (port 1)
depending on pressure range
p
2 min
> p
1
Port 3 no pressure to tank
2.2.2 Operatingpressureranges
... up to 15 bar
... up to 25 bar
... up to 45 bar
... up to 60 bar
2.2.3 Operatingfluid
Hydraulic oil to DIN 51524,
Part 1 and 2
HD oils.
2.2.4 Operatingfluid
temperaturerange
Min. - 20 °C
Max. + 80 °C
2.2.5 Viscosityrange
Min. 10 mm²/sec
Max. 380 mm²/sec
2.2.6 Flowrate
Q
max
= 10 l/min
2.2.7 Filtration
Max. permissible contamination
level of the operating uid to
ISO 4406 Class 18/16/13 -
19/17/14 (NAS 1638, Class 7-8).
We recommend a lter with a
minimum retention rate of
β
5
≥ 100.
The tting of lters and regular
replacement of lter elements
guarantees correct operation,
reduces wear and tear and
increases the service life.
24 V / 8 Ω
12 V / 3.1 Ω
pressure range … 60 barpressure range … 60 bar
pressure range … 45 barpressure range … 45 bar
pressure range … 25 barpressure range … 25 bar
pressure range … 15 barpressure range … 15 bar
outlet pressure p in baroutlet pressure p in baroutlet pressure p in baroutlet pressure p in bar
outlet pressure p in bar outlet pressure p in bar outlet pressure p in bar outlet pressure p in bar
2.2.8 p-Igraphs
(measured at ν = 71 mm²/s;
t = 30 °C; Q = 0 l/min;
fc = 160 Hz; p
2
= 100 bar)
Internal tolerances for each valve
+ 3 / - 8 % of the max. value
l in A
l in A
l in A
l in A
l in A
l in A
l in A
l in A
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3. DIMENSIONS
INSTALLATIONDIMENSIONS08130
Geometry
2.2.9 Hysteresis
≤ 5 %
2.3. TYPEOFOPERATION
2.3.1 Typeofconstruction
Electro-magnetic by means of
a pressure-tight, wet-pin single
stroke proportional solenoid
2.3.2 Typeofvoltage
DC
2.3.3 Controllingcurrentrange
G12: 0 ... 1900 mA
G24: 0 ... 1200 mA
2.3.4 Coilresistance
G12: R20 = 3.1 Ohm
G24: R20 = 8 Ohm
2.3.5 Switch-ontime
100 %
2.3.6 Safetytype
IP65 to DIN 40050 for correctly
tted plug
PDM 08130
after loosening the nut,
the coil can be rotated through 360°
and removed IP65
tting depth
tting depth
R 0.4 max
Cartridgeformtools
Tool Stock no.
Countersink 169 265
Reamer 163 639
Tap 1002648
Plug gauge 163 641
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3. DIMENSIONS
4. CONTROLELECTRONICS
4.1. ELECTRONICAMPLIFIER-TYPEOFCONSTRUCTION
PEK PES PEM
PES: Plug amplier for
tting directly onto valve
solenoids
– suitable for tting onto solenoid
for valve type ...G24-Z4
– compact component, can be
separated from the solenoid
system
– low-loss PDM output stage
– differential input (0 - 10 V)
– reverse polarity protected and
short-circuit proof
– LED display for control start
– base, step and maximum current
adjustable
PEK: 19” Euro card system
– plug connector: male multipoint
DIN 41612-D032
– Euro card system
100 x 160 mm
– 6 TE front plate width
(1 TE = 5.08 mm)
– low-loss PDM output stage
– differential input (0-10 V)
with level adjustment
– additional input for direct
potentiometer connection
– 2 independently adjustable
ramp times
– LED display for supply voltage
– base and maximum current
adjustable
– chopper frequency adjustable
PEM: Amplier module
– can be mounted onto DIN EN
50022 rail and DIN EN 50035 rail
– compact construction
– replaces terminal strip
– low-loss PDM output stage
– differential input (0 - 10 V)
– reverse polarity protected and
short-circuit proof
– base, step and maximum current
adjustable
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PES
PEM
4.6. DIMENSIONS
PEK
Standard models:
Please quote stock no. when ordering.
Delivery for non-standard models is longer and the price is higher.
4.3. SUPPLYVOLTAGE
PEK: 24 V DC ± 10 % (permissible residual ripple 49 %)
PES: 20-32 V DC (permissible residual ripple 5 %)
PEM: 20-32 V DC (permissible residual ripple 5 %)
4.4. CURRENTOUTPUT
4.2. MODELCODE
(also order example) PES - 02 X - G24
Proportional electronic
amplier construction
PEK = 19” Euro card system
PES = plug amplier
PEM = amplier module
Type
00 = not pre-set
02 = pre-set to suit PDM08130
Series
(determined by manufacturer)
Supply voltage
G24 = 24 V DC
PG threaded connection
4-core cable
approx. 2 m long
4.5. REFERENCEINPUT
PEK: 0-10 V DC and direct potentiometer connection
PES: 0-10 V DC
PEM: 0-10 V DC
Stock no. (= order no.) Model code
552 863 PEK-02X-G24
552 864 PES-02X-G24
552 865 PEM-02X-G24
Amplier type Base Step Maximum Chopper Ramp times
current (mA) current (mA) current (A) frequ. (Hz) up/down (sec)
PEK-00X-G24 0-500 – 0-1.6 50-200 0.1-10/0.1-10
PEK-02X-G24 200 – 1.2 160 0.1-10/0.1-10
PES-00X-G24 0-700 0-600 0-1.6 160 –
PES-02X-G24 200 0 1.2 160 –
PEM-00X-G24 0-700 0-600 0-1.6 160 –
PEM-02X-G24 200 0 1.2 160 –
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
5. 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.
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