Proportional 3-Way Pressure-Reducing Cart., Size 4
Q
max
= 10l/min,p
max
= 210bar
Direct acting,electrically operated
Series DDRRZ-7080…, DDRRZ-7110…
1/5
Reference: 400-P-590111-EN-03
Issue: 09.2023
S Compact push-in cartridge construction
for cavity type AGS
S Operated by a proportional solenoid
S Model for p
max
210 bar inlet pressure
S 2 pressure ranges available
S Excellent stability over the whole pressure
and flow range
S All exposed parts with zinc-nickel plating
S High pressure wet-armature solenoids
S Various plug-connector systems and voltages
are available
S Can be fitted in a line-mounting body
1 Description
Series DDRRZ-70… prop. 3-way pressure-reducing car
tridges are direct acting, spool-type, push-in cartridges and
are available in size 4. They reduce the outlet pressure in A
as a function of the control current and independently of the
inlet pressure in P. In the initial position (solenoid de-ener
gised) the inlet of the 3-way pressure-reducing cartridge is
shut off and the outlet is connected to tank (port A → T). In
control mode, the connection P → A opens until the pres
sure in port A reaches the preset level. If the pressure rises
above the preset level, the control spool opens the A → T
connection until balance is attained. Two pressure ranges
are available. To accommodate a maximum operating pres
sure (inlet pressure) of p
max
210 bar, the “H” model must be
used. With other models the maximum operating pressure
is dependent on the pressure range. These 3-way pres
sure-reducing cartridges are predominantly used for reduc
ing a system pressure in mobile and industrial applications.
They are suitable for controlling larger directional valves,
where they can be incorporated in the valve body or directly
in the end covers, for example, and for controlling pumps
and motors. All external parts of the cartridge are zinc-nickel
plated according to DIN EN ISO 19 598 and are thus suit
able for use in the harshest operating environments. For
self-assembly, please refer to the section related data
sheets.
2 Symbol
A
P
T
3 Technical data
General characteristics Description, value, unit
Designation proportional 3-way pressure-reducing cartridge
Design direct acting, electrically operated
Mounting method push-in cartridge, 4 mounting bolts M4x50
Tightening torque 2.6 Nm ± 10%
Size nominal size 4, cavity type AGS
Weight 0.55 kg
Mounting attitude unrestricted (preferably vertical, coil down)
400-P-590111-EN-03/09.2023
Series DDRRZ-7080…, DDRRZ-7110…
2/5
Description, value, unitGeneral characteristics
Ambient temperature range -25°C … +50°C
MTTF
D
values 150 years, see data sheet 400-P-010101-en
Hydraulic characteristics Description, value, unit
Maximum operating pressure p
max
- standard model
(Inlet pressure)
- model “H”
160bar, pressure range “110”
120bar, pressure range “080”
210 bar, both pressure ranges
Flow range - model “110”
- model “080”
… 8l/min
…10l/min
Nominal pressure ranges p
N
- model “110”
- model “080”
…110bar
…80bar
Back pressure in T - static, not controlling
- while controlling
p
max
50bar
< 2 % p
N
Flow direction see symbols
Hydraulic fluid HL and HLP mineral oil to DIN 51 524;
for other fluids, please contact BUCHER
Hydraulic fluid temperature range -25°C … +70°C
Viscosity range 15…380mm
2
/s (cSt), recommended 20...130mm
2
/s (cSt)
Minimum fluid cleanliness
Cleanliness class to ISO 4406:1999
class 18/16/13
Electrical characteristics Description, value, unit
Supply voltage 12V DC, 24V DC
Control current 12 V = 0…1400 mA, 24 V = 0…800 mA
Coil resistance R - cold value at 20°C
- cold value at -25°C
- max. warm value
12 V = 6.4Ω /24V = 17.2Ω
12 V = 5.2Ω /24V = 14.1Ω
12 V = 10.0Ω /24V = 27.0Ω
Inductance
Measured non-operated, at 0.1 mA (rms) / 1 kHz
12 V = 13 mH 24V = 38 mH
Recommended PWM frequency (dither) 160 Hz
Hysteresis with PWM 2…4 % I
N
Reversal error with PWM 2…4 % I
N
Sensitivity with PWM < 1 % I
N
Reproducibility with PWM < 2 % p
N
Relative duty cycle 100%
Nominal power consumption max. 19W
Insulation class to VDE 0580 H (180 °C)
Protection class to ISO20653 / EN60529 IP 65 / IP 67, see “Ordering code”
(with appropriate mating connector and
proper fitting and sealing)
Electrical connection DIN EN 175301-803, 3-pin 2 P+E (standard)
for other connectors, see “Ordering code”
400-P-590111-EN-03/09.2023
Series DDRRZ-7080…, DDRRZ-7110…
3/5
4 Performance graphs measured with oil viscosity 33mm
2
/s (cSt)
p = f (I) Pressure adjustment characteristic
P0084.ai
0
80
60
120
100
40
20
I [mA]0 200 400 500 600 700 800100 300
p
A
[bar]
p
N
80 bar
p
N
110 bar
p = f (I) Pressure adjustment characteristic
P0085.ai
0
80
60
120
100
40
20
I [mA]0 400 800 1000 1200 1400200 600
p
A
[bar]
p
N
80 bar
p
N
110 bar
p = f (Q) Pressure - Flow rate characteristic [DDRRZ-7080…]
P0086.ai
0
20
40
60
80
100
0
20
40
60
80
100
p
A
[bar]
Q [l/min]
108642426810 0
A TP A
p [bar]
p = f (Q) Pressure - Flow rate characteristic [DDRRZ-7110…]
P0087.ai
0
20
40
60
80
100
120
0
20
40
60
80
100
120
p
A
[bar]
Q [l/min]
7.5 96
4.5
31.53 1.54.567.590
A TP A
p [bar]
400-P-590111-EN-03/09.2023
Series DDRRZ-7080…, DDRRZ-7110…
4/5
5 Dimensions & sectional view
36
Ø 30
M4 x 50
78.8
60.8
1
2
3
4
T
P
A
T
3
116
31.267.5
(17.3)
5.9
44.2
62.2
28.6
Junior−Timer
Radial
J
1) 2)
1)
ISO 4400 / DIN 43 650 mating plug connection
2)
Junior Timer Radial plug connection
6 Installation information
IMPORTANT!
When fitting the cartridges, note the mounting atti
tude (preferably vertical, with coil down → auto
matic air bleed) and use the specified tightening
torque. No adjustments are necessary, since the
cartridges are set in the factory.
ATTENTION!
Only qualified personnel with mechanical skills
may carry out any maintenance work. Generally,
the only work that should ever be undertaken is to
check, and possibly replace, the seals. When
changing seals, oil or grease the new seals tho
roughly before fitting them.
Seal kit NBR no. DS-250-N
3)
Item Qty. Description
1 1 O-ring no. 021 ∅23,52x1,78 N90
2 1 O-ring no.014 ∅12,42x1,78 N90
3 1 O-ring no.013 ∅10,82x1,78 N90
4 1 O-ring no.012 ∅9,25x1,78 N90
IMPORTANT!
3)
Seal kit with FKM (Viton) seals, no. DS-250-V
400-P-590111-EN-03/09.2023
Series DDRRZ-7080…, DDRRZ-7110…
5/5
7 Ordering code
DDRRZ = proportional pressure-reducing
cartridge, direct acting
7 = pressure function, 3 way design
110 = pressure range …110 bar
080 = pressure range …80 bar
4 = nominal size 4
(blank) = NBR (Nitrile) seals (standard)
V = FKM (Viton) seals
(special seals - please contact BUCHER)
(blank) = armature without orifice (standard)
H = armature with orifice (for higher inlet pressure, p
max
210 bar)
1 ... 9 = design stage (omit when ordering new units)
... = voltage e.g. 24 (24 V)
D = current DC
(blank) = DIN EN 175301-803 connection with mating plug (standard, IP65)
M100 = DIN EN 175301-803 connection without mating plug
J = Junior Timer radial plug connection without mating plug (protection class IP65)
D = Deutsch plug connection DT04-2P without mating plug (protection class IP67) on request
-
Ex.
_
--DDRRZ 7 110 4 -
_ _
2 24 D
8 Related data sheets
Reference (Old no.) Description
400-P-040011 (i-32) The form-tool hire programme
400-P-040151 (i-33.7) Cavity type AGS
400-P-510101 Amplifier unit for proportional valves (1-channel) PBS-3A
400-P-712105 (G-2.55) Line-mounting body, type GAAZ (G1/4”)
400-P-010101 MTTF
D
values for hydraulic valves
E 2023 by Bucher Hydraulics AG Frutigen, CH-3714 Frutigen
www.bucherhydraulics.cominfo.ch@bucherhydraulics.com
All rights reserved.
Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The
information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual
improvement, we reserve the right to amend the product specifications contained in this catalogue.
Classification: 430.305.305.305.300.310