Proportional 3-Way Pressure-Reducing Cart., Size 2…5
Q
max
= 15l/min,p
max
= 70bar
Direct acting, electrically operated
Series DDRCZ-7011… to 7055…
1/6
Reference: 400-P-590501-E-01
Issue: 05.2012
S Compact design offers space-saving installation
S Push-in cartridge for Bucher standard
cavity type AGA
S Can be turned through 360° at installation
S Operated by a proportional solenoid
S 5 pressure ranges available
S Excellent stability over the whole pressure
and flow range
S Coils protected against penetration by water
S Various plug-connector systems and voltages
are available
S Optionally with auxiliary manual adjustment
S All external parts zinc plated, chromited (CrVI-free)
S Can be fitted in a line-mounting body
1 Description
Series DDRCZ-70… proportional 3-way pressure-reducing
cartridges are direct acting push-in cartridges with a com
pact solenoid system and are available in sizes 2…5. They
reduce the outlet pressure in A as a function of the control
current signal and independently of the inlet pressure in P.
In the initial position (solenoid de-energised) 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 con
nection P → A opens until the pressure 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. Five pressure ranges are available in order to ob
tain precise pressure settings over the whole of the required
pressure range. The maximum operating pressure de
pends on the particular 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. The advantages are the small space require
ment, 360° rotatability at installation, and easy installation
of the plug-in cartridge thanks to the mounting clip. The
compact solenoid system also offers an ideal price/per
formance ratio, which is vital for reducing operating costs
and capital expenditures. All external parts of the cartridge
are zinc plated and chromited (CrVI-free) and are thus suit
able for use in the harshest operating environments. If you
intend to manufacture your own cavities or are designing a
line-mounting installation, please refer to the section “Re
lated data sheets”.
2 Symbol
A
P T
A
P T
DDRCZ-7011…7055… DDRCZ-7011…7055…S619
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 with mounting clip
for 2 cap screws, M4 x 12
400-P-590501-E-01/05.2012
Series DDRCZ-7011… to 7055…
2/6
Description, value, unitGeneral characteristics
Tightening torque 1,8 Nm ± 10%
Size nominal size 2…5, cavity type AGA
Weight 0.45 kg
Mounting attitude unrestricted (preferably vertical, coil down)
Ambient temperature range -25°C … +50°C
Hydraulic characteristics Description, value, unit
Maximum operating pressure p
max
(Inlet pressure)
70bar, pressure range “055”
70bar, pressure range “040”
40bar, pressure range “030”
30bar, pressure range “020”
20bar, pressure range “011”
Flow range …15l/min
Nominal pressure ranges p
N
- model “055”
- model “040”
- model “030”
- model “020”
- model “011”
…55bar
…40bar
…30bar
…20bar
…11bar
Back pressure in T - static, not controlling
- while controlling
p
max
10bar
< 2 % p
N
Flow direction see symbols
Hydraulic fluid HL and HLP mineral oil to DIN 51 524;
for other fluids, please consult 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…1500 mA, 24 V = 0…800 mA
Coil resistance R - cold value at 20°C
- max. warm value
12 V = 4.8Ω/24V = 17.6Ω
12 V = 8.0Ω/24V = 28.0Ω
Recommended PWM frequency (dither) 200 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. 18W
Protection class to EN 60 529 IP 65 / IP 67 / IP 69K, see “Ordering code”
(with appropriate mating connector and
proper fitting and sealing)
Electrical connection see “Ordering code”
400-P-590501-E-01/05.2012
Series DDRCZ-7011… to 7055…
3/6
4 Performance graphs measured with oil viscosity 33mm
2
/s (cSt)
p = f (I) Pressure adjustment characteristic
P0258.ai
0
40
30
60
50
20
10
I[mA]0 200 400 500 600 700 800100 300
p
A
[bar]
p
N
11 bar
p
N
20 bar
p
N
30 bar
p
N
40 bar
p
N
55 bar
p = f (I) Pressure adjustment characteristic
P0259.ai
0
40
30
60
50
20
10
I[mA]0 500 1000 1250 1500250 750
p
A
[bar]
p
N
1 1 bar
p
N
20 bar
p
N
30 bar
p
N
40 bar
p
N
55 bar
p = f (Q) Pressure - Flow rate characteristic [DDRCZ-7055…]
P0260.ai
0
10
20
30
40
50
60
0
10
20
30
40
50
60
70 70
p
A
[bar]
Q[l/min]
2.5 32
1
.510.510.51.522.530
A TPA
p[bar]
p = f (Q) Pressure - Flow rate characteristic [DDRCZ-7040…]
P0261.ai
0
10
20
30
40
50
0
10
20
30
40
50
p
A
[bar]
Q[l/min]
342112340
A TPA
p[bar]
400-P-590501-E-01/05.2012
Series DDRCZ-7011… to 7055…
4/6
p = f (Q) Pressure - Flow rate characteristic [DDRCZ-7030…]
P0262.ai
0
10
20
30
40
0
10
20
30
40
p
A
[bar]
Q[l/min]
108642426810 0
A TPA
p[bar]
p = f (Q) Pressure - Flow rate characteristic [DDRCZ-7020…]
P0263.ai
0
5
10
15
20
25
30
0
5
10
15
20
25
30
p
A
[bar]
Q[l/min]
10 12864242681012 0
A TPA
p[bar]
p = f (Q) Pressure - Flow rate characteristic [DDRCZ-7011…]
P0264.ai
0
2.5
5
7.5
10
12.5
15
0
2.5
5
7.5
10
12.5
15
p
A
[bar]
Q[l/min]
14 1612
1
0860224684
A TPA
p[bar]
400-P-590501-E-01/05.2012
Series DDRCZ-7011… to 7055…
5/6
5 Dimensions & sectional view
Junior −Timer
Radial
J
4
3
.5
112.1
29.2
4.5
82.9
73.9
5
2
.
1
M4x12
2)
24.4
34.3
9
26.6
Ø 36
3
1
2
3
A
Ma =1.8 [Nm]
±10 %
P
T
Junior −Timer
Axial
I
AMPSEAL −16
Axial
A
6 Auxiliary manual adjustment
As an option, series DDRCZ… proportional 3-way pres
sure-reducing cartridges can be provided with an auxiliary
manual adjustment, type S619. In the event of a power fail
ure, for example, it can be used to set the required pressure
mechanically.
29.9 ... 25.6
Ø 14.7
7 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 thor
oughly before fitting them.
Seal kit NBR no. DS-154-N
1)
Item Qty. Description
1 1 O-ring no. 021 ∅23,52x1,78 N90
2 1 O-ring no.013 ∅10,82x1,78 N70
3 1 O-ring no.012 ∅9,25x1,78 N70
IMPORTANT!
1)
Seal kit with FKM (Viton) seals, no. DS-154-V
2)
Valve mounting bolts M4x12
(included in the delivery)
400-P-590501-E-01/05.2012
Series DDRCZ-7011… to 7055…
6/6
8 Ordering code
DDR = pressure-reducing cartridge, direct acting
C = compact solenoid (proportional)
A ... Q = standard model - see relevant data sheets
Z ... R = special features - please consult BUCHER
7 = pressure function, 3 way design
055 = pressure range …55 bar
040 = pressure range …40 bar
030 = pressure range …30 bar
020 = pressure range …20 bar
011 = pressure range …11 bar
2 = nominal size 2 for pressure range 055
2 = nominal size 2 for pressure range 040
3 = nominal size 3 for pressure range 030
4 = nominal size 4 for pressure range 020
5 = nominal size 5 for pressure range 011
(blank) = NBR (Nitrile) seals (standard)
V = FKM (Viton) seals
(special seals - please consult BUCHER)
1 ... 9 = design stage (omit when ordering new units)
... = voltage e.g. 24 (24 V)
D = current DC
J = Junior Timer radial plug connection (IP65)
I = Junior Timer axial plug connection (IP65) mating plug not supplied
A = AMPSEAL 16-axial plug connection (IP65/67/69K)
for the following plug-variants, please consult Bucher:
(blank) = ISO 4400 / DIN 43 650 mating plug
D = Deutsch plug connection DT04-2P (IP65/67/69K) mating plug not supplied
F = flying leads (500 mm)
S619 = as option: auxiliary manual adjustment (mechanical pressure setting)
_
-
Ex.
--
DDR 7 055 32
_
C Z S61924 D
9 Related data sheets
Reference Description
400-P-040011 The form-tool hire programme
400-P-040142 Cavity type AGA
400-P-712101 Line-mounting body, type GAAA (G1/4”)
E 2012 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