EN 5.194.9.0/11.22
1
3-Way Proportional Pressure Control Valve
PDRC04T30D
Spool Type, Direct-Acting
Slip-In Valve – 60 bar
up to 4 l/min
up to 60 bar
PRODUCT ADVANTAGES
z Main applications: pilot valve for directional spool valves and other main-stage
valves, accumulator charging circuits, slewing angle adjustment on pumps,
clutches.
z Very compact design
z Excellent small signal characteristics combined with low leakage.
z Very good dynamics thanks to low coil inductance.
z Stable operating behaviour thanks to self-venting after several actuations.
z Robust spring design not aected by tank pressure spikes.
z Extensive environmental trial test has been performed.
z Exposed surfaces zinc-nickel plated for increased corrosion protection.
DESCRIPTION OF FUNCTION
The proportional pressure control valve is a direct-acting 3-way spool-type valve.
When de-energised, port 2 is closed and port 1 (consumer) is connected to port 3 (tank).
When the control current is increased, the solenoid coil acts on the control piston with a
force that is proportional to the control current, dening the adjusted pressure at port 1. If
a pressure acts on port 1 that is higher than the set pressure, because of external
inuences, the valve opens from port 1 to port 3 (tank).
Pilot system
pressure
The valve has been specially developed for pilot applications. In these applications, the
main requirement is precise conversion of the input signals to a stable control pressure.
At the same time, the leakage during the control procedure must remain low, to ensure
that the hydraulic accumulator can preserve the emergency supply of the pilot control
circuit for as long as possible in the event of an error.
Notice
Pressures at port 3 are additive to the control pressure. We recommend discharging the
oil owing to the tank from port 3 separately, to shield the valve from pressure spikes
caused by the work hydraulics.
FUNCTION
in acc. with NFPA
in acc. with ISO
EN 5.194.9.0/11.22
2
SPECIFICATIONS
1)
Operating pressure at port: 2 Max. 60 bar
Tank pressure at port 3 Max. 30 bar (dynamic)
Notice: should be piped to tank separately, i.e. not connected to the work hydraulics.
Setting ranges (port 1) 20 / 25 / 32 bar
Flow rate max. 4 l/min
Internal leakage 25 ml/min. at p2 (primary) = 30 bar and 36 cSt (de-energised)
Temperature range of operating uid NBR: min. -30 °C up to max. +105 °C
FKM: min. -20 °C up to max. +105 °C
Ambient temperature range Min. -30 °C to max. +80 °C (see thermal load capacity of the coil)
Operating uid Hydraulic oil to DIN 51524 Part 1, 2 and 3
Viscosity range Min. 7.4 mm²/s to max. 420 mm²/s
Filtration of operating uid Min. class 20/18/15, to ISO 4406
MTTF
d
150–1200 years, assessment according to DIN EN ISO 13849-1:2016, Table C.1,
Conrmation of ISO 13849-2:2013; Tables C.1 and C.2
Mounting position No orientation restrictions
Materials
Valve bodies Steel
Pistons Hardened and ground steel
Seals NBR, FKM
Corrosion protection
3)
672 h salt spray test, in acc. with DIN EN ISO 9227
Cavity 04T30
Weight 0.19 kg
Electronics
Duty cycle 100 % duty cycle (continuous)
2)
Control current range 0–750 mA; 20.8 Ω (24 volt)
0–1500 mA; 4.9 Ω (12 volt)
Dither frequency 110–200 Hz
Hysteresis with dither ≤ 3 % of the max. control current
Repeatability ≤ 1 % of the max. setting range
Reversal error ≤ 0.5 % of the max. control current
Response accuracy ≤ 1 % of the max. control current
Insulation class H to VDE0580, 180 °C
1)
See "Conditions and Instructions for Valves" in brochure 53.000
2)
See “Thermal load capacity of the coil”
3)
Downstream actions such as marking or anging may result in impairment to the surface nish and thus to reduced corrosion protection at these
points.
THERMAL LOAD CAPACITY OF THE COIL
100 % duty cycle at T
ambient
max = 80 °C
Please note:
The data is based on the complete valve, mounted in a line body (block temperature 105 °C, aluminium or steel; dimensions
40 x 60 x 56 mm), anged to a base block (block temperature 105 °C, steel; dimensions 200 x 150 x 100 mm).
In the underlying test, air was circulated in the climate chamber with T
ambient
.
EN 5.194.9.0/11.22
3
DIMENSIONS
Depiction with optional screen protection
Millimetres
Subject to technical modications.
ISO 4762-M4 – 8.8
Tightening torque
2.8
±0.2
Nm
CAVITY
04T30
Millimetres
Subject to technical modications.* Permitted boring zone (for block design)
Fit depth
Fit depth
Example:
Max. nom. Ø:
EN 5.194.9.0/11.22
4
MODEL CODE
PDRC04T30D - 03 - C - V - 20 - 24 PN - 20.8
Description
3-way proportional pressure control valve, compact
Design
01 = without screen
03 = with screen at port 2
Type of connection
C = only cartridge valve (slip-in cartridge)
Sealing material
N = NBR
V = FKM
Setting range
20 = 20 bar
25 = 25 bar
32 = 32 bar
Coil voltage
24 = 24 V DC (20.8 Ω)
12 = 12 V DC (4.9 Ω)
Coil type
DC: PN = Deutsch connector, 2-pole, axial
PU = Junior Timer, 2-pole axial
Coil resistance
20.8 = 20.8 Ω (24 V)
4.9 = 4.9 Ω (12 V)
EXAMPLE CHARACTERISTICS
Measured at µ = 64 mm²/s and T
oil
= 32 °C, Q = 0 l/min
p/l curve, pressure range 20
Note:
Upper limit and lower limit refer to the permitted tolerance range for the position of the characteristic
curve in series testing. The curve shown represents the statistical average curve in the series testing.
dp 2-1 [bar]
l [mA]
12 V
dp 2-1 [bar]
l [mA]
24 V
EN 5.194.9.0/11.22
5
EXAMPLE CHARACTERISTICS
Measured at µ = 64 mm²/s and T
oil
= 32 °C, Q = 0 l/min
p/l curve, pressure range 25
p/l curve, pressure range 32
p/Q curve by pressure range
dp 2-1 [bar]
l [mA]
12 V
dp 2-1 [bar]
l [mA]
24 V
dp 2-1 [bar]
l [mA]
12 V
dp 2-1 [bar]
l [mA]
24 V
Control pressure
Q [l/min]
Pressure range 20 bar
Control pressure
Q [l/min]
Pressure range 25 bar
Control pressure
Q [l/min]
Pressure range 32 bar
EN 5.194.9.0/11.22
6
HYDAC Fluidtechnik GmbH
Justus-von-Liebig-Str.
66280 Sulzbach/Saar
Germany
Phone: +49 68 97 / 509-01
Fax: +49 68 97 / 509-598
E-mail: valves@hydac.com
NOTE
The information in this brochure relates to the operating conditions and applications
described.
For applications not described, please contact the relevant technical department.
Subject to technical modications.
EXAMPLE CHARACTERISTICS
Measured at µ = 64 mm²/s and T
oil
= 32 °C, Q = 0 l/min
Δp/Q curve (all pressure ranges)
MATERIAL OVERVIEW
Standard models
Designation Part no.
PDRC04T30D-01-C-N-20-24PN-20.8 4538955
PDRC04T30D-01-C-N-25-12PN-4.9 4495331
PDRC04T30D-03-C-N-25-12PN-4.9 4674488
PDRC04T30D-01-C-V-20-12PN-4.9 4538957
Other versions on request.
Spare parts, seal kits
Description Material Part no.
Seal kit 04T30-FKM FKM 4527332
Seal kit 04T30-NBR NBR 4527330
Accessories, cavity tools for material aluminium
Designation Part no.
Step drill 4593830
Countersink 4594238
p [bar]
A > T q [l/min] P A
