Inline Compensator Cartridge, Size 10
Q
max
= 80l/min,p
max
= 350bar
Direct acting, compensator spring adjustable or fixed,optional damped design
Series DWDPB-5D…,DWDPUB-5D…
1/8
Reference: 400-P-330501-EN-01
Issue: 09.2015
S Adjustable compensator spring: from 5…15 bar
S Fixed compensator spring: 1, 4, 6 or 8 bar
S External remote-control port Z with integral
damping orifice
S High flow rates
S Excellent stability over the whole pressure
and flow range
S Available with hand-knob or tamper-proof cap
S Optionally with damped spool,
for use with low load pressures (<20bar)
S All exposed parts with zinc-nickel plating
S Can be fitted in a line-mounting body
S Can be fitted in sandwich bodies
1 Description
These directacting inline pressurecompensator (hydro-
stat) cartridges, series DWDPB5D10…, are size 10, high
performance screwin cartridges with an M24x1.5 mounting
thread. The main stage is designed on the slidingspool
principle. The range includes a model with an adjustable
pressurecompensator spring (5 ... 15 bar) and four models
with a fixed compensator spring (1, 4, 6 or 8 bar).
Pressurecompensator cartridges maintain the control
pressure difference between inlet and outlet pressure  for
example, across a throttle (an orifice)  at a constant level.
This means that the flow rate is independent of the load
pressure at the actuator. An optional model
DWDPUB5D10... with damped spool is available for use
in oscillationsusceptible conditions (for example, with load
pressure < 20 bar).
The adjusting screw or the handknob enable the user to
carry out system optimisation directly on the equipment,
without any need to install or replace components that have
different flow ranges (e.g. proportional valves). To
safeguard valve settings, the adjusting screw can be sealed
with a tamperproof cap. These screwin cartridges are
used in hydraulic circuits in mobile and industrial appli-
cations, predominantly in conjunction with a throttle
cartridge. All external parts of the cartridge are zinc-nickel
plated to DIN 50979 and are thus suitable for use in the
harshest operating environments. If you intend to manufac
ture your own cavities or are designing a line-mounting in
stallation, please refer to the section “Related data sheets”.
2 Symbol
A
B
Z
A
B
Z
DWDPB-5D-10-…S0515… DWDPB-5D-10-F…
400-P-330501-EN-01/09.2015
Series DWDP…-5D…
2/8
3 Technical data
General characteristics Description, value, unit
Designation Inline pressure-compensator cartridge
Design direct acting, compensator spring adjustable or fixed,
optional damped design, external remote-control port Z
with integral damping orifice
Mounting method screw-in cartridge M24x1.5
Size nominal size 10, cavity type DD to Bucher Standard
Weight 0.25 kg
Mounting attitude unrestricted
Ambient temperature range -25°C … +80°C
Hydraulic characteristics Description, value, unit
Maximum operating pressure 350bar
Maximum flow rate B A 80 l/min
Maximum flow rate attainable at the actuator see performance graphs
Pressure adjustment range 5…15bar (1 turn 1.9bar)
Flow direction B A, 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 … +80°C
Viscosity range 10…650mm
2
/s (cSt), recommended 15...250mm
2
/s (cSt)
Minimum fluid cleanliness
Cleanliness class to ISO 4406:1999
class 20/18/15
400-P-330501-EN-01/09.2015
Series DWDP…-5D…
3/8
4 Performance graphs
measured with oil viscosity 33mm
2
/s (cSt)
Test setup (for flow rate v. p characteristic)
p
L
P0000.ai
1)
2)
4)
3)
A
B
Z
1)
Load sensing immediately after orifice
2)
2)
Throttle function (orifice size, see performance graphs)
3)
Inline pressure-compensator cartridge
4)
Actuator port (p
L
= load pressure)
IMPORTANT!
The load-sensing tapping point must be located
immediately after the throttle (orifice). Also bear in
mind that the pressure drop between the compen
sator inlet (B) and the throttle outlet (orifice
2
) must
be as small as possible (short distance between
the two components). This gives the best flow rate
/ load pressure values.
4.1 Adjustable model
Q = f (p) Flow rate - Pressure drop characteristic
at the minimum compensator setting (5 bar)
P0348.ai
10
20
30
40
0
0
300 35025020015010050
Q [l/min]
~ Ø 2.5...3.5~ Ø 2.5...3.5
~ Ø 3.5...4.5~ Ø 3.5...4.5
~ Ø 4.5...5.5~ Ø 4.5...5.5
~ Ø 5...6~ Ø 5...6
Q = f (p) Flow rate - Pressure drop characteristic
at the maximum compensator setting (15 bar)
P0347.ai
0
40
20
100
Q [l/min]
0
300 35025020015010050
80
60
~ Ø 2.5...3.5~ Ø 2.5...3.5
~ Ø 3.5...4.5~ Ø 3.5...4.5
~ Ø 5.5...6.5~ Ø 5.5...6.5
~ Ø 4.5...5.5~ Ø 4.5...5.5
p = f (Q) Pressure drop - Flow rate characteristic (BA)
(Port Z pressurised)
P0353.ai
0
5
10
15
20
25
Q [l/min]806040200
p [bar]
IMPORTANT!
Special version (M527) with lower pvalues can
be supplied – please contact Bucher.
400-P-330501-EN-01/09.2015
Series DWDP…-5D…
4/8
4.2 Fixed model
Q = f (p) Flow rate - Pressure drop characteristic
at the fixed compensator setting (1 bar)
P0349.ai
0
10
30
40
Q [l/min]
3500
30025020015010050
20
~ Ø 6.5...7.5~ Ø 6.5...7.5
~ Ø 5.5...6.5~ Ø 5.5...6.5
~ Ø 3.5...4.5~ Ø 3.5...4.5
Q = f (p) Flow rate - Pressure drop characteristic
at the fixed compensator setting (4 bar)
P0350.ai
0
10
30
40
Q [l/min]
3500
30025020015010050
20
~ Ø 5...6~ Ø 5...6
~ Ø 3.5...4.5~ Ø 3.5...4.5
~ Ø 2.5...3.5~ Ø 2.5...3.5
~ Ø 4.5...5.5~ Ø 4.5...5.5
Q = f (p) Flow rate - Pressure drop characteristic
at the fixed compensator setting (6 bar)
P0351.ai
0
10
30
40
50
60
Q [l/min]
3500
30025020015010050
20
~ Ø 6...7~ Ø 6...7
~ Ø 4...5~ Ø 4...5
~ Ø 3.5...4.5~ Ø 3.5...4.5
~ Ø 5...6~ Ø 5...6
Q = f (p) Flow rate - Pressure drop characteristic
at the fixed compensator setting (8 bar)
P0352.ai
0
20
60
80
Q [l/min]
3500
30025020015010050
40
~ Ø 6...7~ Ø 6...7
~ Ø 4.5...5.5~ Ø 4.5...5.5
~ Ø 3...4~ Ø 3...4
~ Ø 5.5...6.5~ Ø 5.5...6.5
p = f (Q) Pressure drop - Flow rate characteristic (BA)
(Port Z pressurised)
P0354.ai
0
5
10
15
20
25
Q [l/min]806040200
p [bar]
400-P-330501-EN-01/09.2015
Series DWDP…-5D…
5/8
5 Dimensions & sectional view
5.1 Model with adjustable compensator spring
With adjusting screw “S”
47...54.547.5
94.5...102
15.5...23
S
1
5
A
Z
27
M
A
2)
17
2
2
1
M24x1.5
B
1)
With hand-knob adjuster “H”
33...40.5
Ø 40
Adjusting screw with tamper-proof cap
(order separately in plain language)
28
Tightening torque M
A
2)
±10%
Cavity type DD
When fitted in steel
When fitted in aluminium
65[Nm]
50[Nm]
400-P-330501-EN-01/09.2015
Series DWDP…-5D…
6/8
5.2 Model with fixed spring
83
47.5 35.4
27
M
A
2)
M24x1.5
2
2
1
A
Z
B
Tightening torque M
A
2)
±10%
Cavity type DD
When fitted in steel
When fitted in aluminium
65[Nm]
50[Nm]
6 Installation information
IMPORTANT!
When fitting the cartridges, use the specified
tightening torque. Set the required control p
(5…15 bar) with the adjusting screw (S
1
5). After
you have set the valve, lock the adjusting screw
with the lock nut.
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.
IMPORTANT!
Valve settings can be sealed by fitting the
tamper-proof cap. To fit the cap, the snap ring
1)
has to be removed. Subsequent adjustment is
only possible by destroying the tamper-proof cap.
Seal kit NBR no. DS-288-N
3)
Item Qty. Description
1 1 O-ring 22.10/16.50 x 2.50
2 2 O-ring no.020 21.95x 1.78 N90
IMPORTANT!
3)
Seal kit with FKM (Viton) seals, no. DS-288-V
400-P-330501-EN-01/09.2015
Series DWDP…-5D…
7/8
7 Application examples
The following diagram shows a typical manifold block for a
load-sensing circuit with a pressure/flow-controlled pump.
The block uses our direct acting, inline pressure-compen
sator cartridges.
In this application all three actuators have to travel together,
and it is therefore necessary to provide an inline compensa
tor for each station.
The direction and speed of cylinder 1 is determined by the
4/3 proportional directional valve (4/3-PW), which has me
ter-in and meter-out throttling.
The inline compensator (IDW1) ensures that there a con
stant pressure drop across the proportional directional
valve. Since the cylinder is also braked by this proportional
directional valve (4/3-PW), the load signal is fed back
through a 3/2 solenoid valve (StV) that connects with the re
spective cylinder supply line in each situation.
The speed of cylinder 2 (Zyl. 2) is independent of the load,
and it is determined by the ventable proportional throttle
(PD1) and the inline compensator (IDW2).
By placing a proportional pressure-relief valve (ePD) in the
remote-control line for the compensator, we create a pro
portional 2-way pressure-reducing function. The direction
of travel is determined by a 4/2 solenoid valve (4/2-WV) and
the deceleration is controlled by the two counterbalance
valves.
In the case of cylinder 3 (Zyl. 3), the ventable proportional
throttle (PD2) and inline compensator (IDW3) ensure that its
travel speed is also load-compensated. The electrically
operated pressure-relief valve (DV1) enables two different
adjustable pressure levels to be set and activated. The two
3/2 directional valves (3/2-WV1 / 3/2-WV2) control the direc
tion of travel (and fast-advance, slow speed). The counter
balance valve, which is unaffected by back pressure, pre
vents the cylinder from overrunning.
400-P-330501-EN-01/09.2015
Series DWDP…-5D…
8/8
8 Ordering code
73
DW = compensator
D = direct acting
P = cartridge design
(blank) = without spool damping (standard)
U
= with spool damping
A ... Q = standard model - see relevant data sheets
Z ... R = special features - please consult BUCHER
5 = pressure function 5 (with external remote-control port Z)
D = cavity type DD
10 = nominal size 10
S
(
)
= screw adjuster (standard) – adjustable compensator spring
H = hand-knob adjuster – adjustable compensator spring
F = fixed compensator spring
0515 = adjustable compensator spring (control p), steplessly adjustable 5…15 bar
01 = fixed compensator spring (control p), 1 bar
04 = fixed compensator spring (control p), 4 bar
06 = fixed compensator spring (control p), 6 bar (standard)
08 = fixed compensator spring (control p), 8 bar
(blank) = NBR (Nitrile) seals (standard)
V = FKM (Viton) seals
(special seals - please contact BUCHER)
1 ... 9 = design stage (omit when ordering new units)
-1
Ex.
10
0515
-
5 SB --UDDW P D
_
IMPORTANT!
() When required, the tamper-proof cap (the adjustment seal) must be ordered separately in plain language.
9 Related data sheets
Reference (Old no.) Description
400-P-040011 (i-32) The form-tool hire programme
400-P-060121 (i-45.2) Cavity type DD
400-P-740111 (G-24.21) Line- and manifold-mounting body, type DDY-12 (G1/2”)
400-P-335501 (D-30.55) Sandwich presssure-relief valve, size 6, type SDWDPB-2D…
400-P-336501 (D-31.55) Sandwich presssure-relief valve, size 10, type SDWDPB-2D…
E 2015 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: 430.305.320.305.330.355