Sectional Directional
Control Valve
RS 220
Key valve features
RS 220 is a sectional open center valve
designed for
max. operating pressures
up
to 300 bar and max. pump ows up to
80 l/min.
It is available with 1 to 10 working
sections per valve assembly.
RS 220 is designed with an open center
for xed pumps and a restricted open
center for variable displacement pumps.
It is available with electro-hydraulic or
hydraulic proportional remote control, but
the valve can also be manually operated.
The electro-hydraulic proportional
version in particular offers compact
design with internal pilot oil supply,
solenoids integrated in the valve body
and integral hand levers for manual
override / manual operation.
RS 220 can be fully adapted for marine
applications.
The valve offers excellent operating
characteristics because of the
specially designed spools for different
applications.
Low and uniform spool forces are the
result of careful balancing of the ow
forces.
Q-function
The ow control (Q-function) of the inlet
section by-passes the major part of the
pump ow to tank when the system is
idling, still giving access to full pump
ow when the services are operated.
Besides greatly reducing heat generation
this also provides improved operating
characteristics.
Applications
The RS 220 is ideal for applications
where you need excellent control
characteristics such as cranes,
scissor-lifts, excavators, telescopic load
handlers, skid-loaders, wheel loaders
etc.
Technical data
Pressure and ow values*
Max. operating pressure per port:
P1, A, B: 300 bar
PP: 25 bar
Without HPCO-Function T1, T3: 20 bar
With HPCO-Function T1, T3: 300 bar
With internal connection of PT to T
T2, T4: 5 bar
With external pilot drain line
T2, T4:
PT:
20 bar
depressurized to tank
Max. permissible ow on port P1: 80 l/min
Further data
Spool control force of spool control 901:
Neutral position: 110 N
Max. spool stroke: 130 N
Permissible contamination level: 20 / 18 / 14 as per ISO 4406 or cleaner
Viscosity range: 10 – 400 mm
2
/s (cSt)
Higher viscosity permitted at start up
Leakage A, B → T at 100 bar,
32 cSt and 40 °C:
≤13 cc/min
Pressure uid: Mineral oil and synthetic oil based on mineral oil
HL, HLP according to DIN 51524
Fluid temperature range: -15 °C up to +80 °C
* Higher or other values are possible, depending on application.
For applications with higher requirements than those stated above, please contact us.
MTTFd value on request from HYDAC.
Remote control
The RS 220 is designed with an integrated
pilot supply system for easy installation
and reliable remote control function.
It is also possible (and in some cases
to preferable) to supply the pilot system
externally.
Further properties
and possibilities
z A wide choice of spools and spool
controls for different ow combinations
and for several applications and
systems
z A full range of service port valves
z Possibility of high pressure carry-over
z Electrical unloading
z Manual versions easily convertible
to remote control
1
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31-02-RS220-04/10.15
2
Pressure drop
Oil temperature / viscosity for all graphs: +40 °C / 32 cSt
General overview
10 sect.
1 sect.
Solenoid operated valve
Outlet
Tie rod
B-side spool actuator
Lever / manual override
By-pass ow control unit
Pilot relief valve
Metering orice
Inlet
El. unloading valve
Unloading unit
A-side spool control
∆p (bar)
∆p (bar)
∆p (bar)
∆p (bar)
Q (l/min)
Q (l/min)
Q (l/min)
Pressure drop P – T, unloaded valve
Note: The pressure drops P – T are valid for a valve
with a metering orice PF305 for the center gallery.
In the unloaded mode, the valve will have a small
ow in the center gallery.
Note: The pressure drop curves P – A/B and
A/B – T are valid for sections equipped with
spools that are fully open at maximum spooltravel.
Pressure drop P – A/B
Pressure drop P – T (idling)
Pressure drop A/B – T
Sect. no. 10
Sect. no. 1
Q (l/min)
Sect. no. 1
Sect. no. 10
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3
Dimensions and weight
Weight
Inlet section 6.3 kg
Working section 5.0 kg
Outlet section 4.6 kg
No. of working sections L [mm] LF [mm]
1 163 84
2 206 127
3 249 170
4 292 213
5 335 256
6 378 299
7 421 342
8 464 385
9 507 428
10 550 471
Electrical unloading
Data
Rated ow: 40 l/min
Power consumption:
18 W (12 V)
19 W (24 V)
Rated voltage E912: 12 V
Rated voltage E926: 24 V
Max. voltage variation: +/-15 %
Duty factor*: 100 %
Connection**:
Connector according to
EN 175304-803 (form A)
Protection class: IP65
* Sufcient cooling must be provided.
** Other options available on request.
The unloading valve has manual override, with twist pin operation.
PE20 is the plug for the cavity.
37.8
49.5
45
43.5 43.5
52.552.5
103121
258
356.8
32
29.5
(105)
M8 (4x)
52.5
46
3939
190
47.5
41
43 43
L
LF
43 43
37.7
80.5126
PLS G¼"
PM1 G¼"
PT G¼"
PP G¼"
PM2 G¼"
T1 G¾"
T4 G¾"
P1 G½"
T3 G½"
A-side
G½"
T2 G¾"
B-side
G½"
TD4 M6
The drawing shows a 4 section valve
with inlet and outlet. The working
sections are congured with various
types of spool controls. The codes
shown on the drawings refer to the
G-threaded port names and sizes
dependent valve specication.
31-02-RS220-04/10.15
4
Inlet section I01G
With ow control and electrical unloading function
Main relief function
The by-pass ow control valve FK301
2
in combination
with the relief valve TB12
3
form the pilot operated relief valve
function of the inlet section for the primary circuit (valid for
all congurations).
z TB12 is adjustable and sealable
z Setting range: 35 – 300 bar (3.5 – 30.0 MPa)
z Setting range step: 5 bar
The I01G
1
with its integral Q-function provides by-pass of
pump ow to tank when idling, thereby reducing pressure drop
and heat generation. The ow control function of the inlet also
regulates the ow to the user corresponding to the travel of a
partially selected spool. This, in addition to reduced ow forces
and a control response largely unaffected by varying pump ows,
contributes to the excellent operating characteristics achievable
with RS 220.
The solenoid selected relief valve shuts off the oil supply
to the valve sections.
Together with a load holding valve RS 220 achieves a
very safe emergency dump of pump oil to tank.
The maximum ow into the center gallery is set by an
exchangeable metering orice.
The opening of the by-pass ow control spool is cushioned by
a special check valve integrated in the spool.
1 Inlet section I01G
2 By-pass ow control unit FK301
3 Pilot relief valve TB12
4 Metering orice for center gallery PF305
5 Unloading unit FU301
6 Solenoid operated valve E926
1
4
6
5
2
3
∆p (bar)
∆p (bar) / Q (l/min)
Q (l/min)
Q (l/min)
Center ow (l/min)
with PF305
∆p1 (bar)
6
4 3
2
5
1
P1 T4
PM1
A-side B-side
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5
Inlet section I01G
With ow control and without unloading function
Inlet section I01G
For systems with variable displacement pumps
The inlet section can also be supplied without the unloading
function. The unloading spool and the solenoid operated valve
in that case are replaced by blanking plugs.
The inlet section I01G
1
can also be used in valves in systems
with variable displacement pumps. The pump must be of the
LS-regulated type. The inlet congured for variable pumps
provides a modied Q-function. When the system is idling the
pump delivers a regulated ow to the center gallery. The regulated
ow is set by the combination of metering orice and actual stand-
by pressure from the pump.
Preferably, the max. system pressure is set in the pump but as an
extra safeguard the inlet is equipped with a pilot operated primary
relief valve. As the regulated ow is set by the combination of
metering orice and the stand-by pressure, it is important to that
the metering orice is specic to the pump.
Use PF302
4
if the stand-by pressure is 14 bar, PF303 if it is
20 bar and PF304 if it is 24 bar. Generally the stand-by pressure is
signicantly higher than the pressure drop over the metering orice
in an open center system. This means that the metering orice
in a system with variable pump has to be smaller. The solenoid
selected relief valve shuts off the oil supply to the valve sections.
Together with a load holding valve this provides emergency shut
off of the oil supply.
1 Inlet section I01G
2 By-pass ow control unit FK301
3 Pilot relief valve TB12
4 Metering orice for center gallery PF305
5 Plug replacing unloading unit PU300
6 Plug replacing electrical unloading valve PE20
1 Inlet section I01G
2 Primary relief valve FK310
3 Pilot relief valve TB12
4 Metering orice for center gallery PF302, 303, 304
5 Shut-off unit FU302
6 Solenoid operated valve E926
7 LS-port
1
4
6
5
2
3
1
4
6
5
2
3
7
6
4 3
2
5
1
P1 T4
PM1
A-side B-side
6 4 3
2
7
5
1
P1 T4
PM1
PLS
A-side B-side
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6
Working section S01G
Manually operated
Working section S01G
Hydraulically operated
The working section S01G
1
is shown equipped as manually
operated. Existing cavities for solenoid valves are tted with
blanking plugs (PE11)
3
which connect (drain) the spool ends
to the tank. This is necessary because there are no spool seals
to separate the return line galleries from the spool ends. This
feature provides very good protection for spool ends (ideal for
marine use) and minimizes the risk of external leakage.
The working section S01G
1
is shown equipped as hydraulically
operated and without manual override. Adapters (HG10)
3
are
tted into the solenoid valve cavities. They connect the pressure
from a hydraulic control valve to the spool ends.
6
6
3
3
2
2
9
9
1
1
3
3
4
4
7
7
5
8
8
8
8
2
2
3
3
3
3
4
4
5
5
7
7
6
6
1
1
9
9
8
8
8
8
A
A
B
B
A-side
A-side
B-side
B-side
1 Working section S01G
2 Load check valve MB22
3 Plug PE11
4 Spool control, B-side B01
5 Lever mechanism LMA
6 Spool control, A-side 9
7 Centering spring for manual control MS
8 Service port valve TBD160
9 Spool
1 Working section S01G
2 Load check valve MB22
3 Adapter for hydraulic remote control HG10
4 Spool control, B-side B01
5 Plug, replacing lever mechanism PM02
6 Spool control, A-side 9
7 Centering spring for proportional control PS
8 Service port valve TBD160
9 Spool
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7
Working section S01G
Electro-hydraulically operated
Load check valve
Solenoid valve ER62 / 64 for electro-hydraulic proportional (EHP) control
The working section S01G
1
is shown equipped to be
electro-hydraulically operated and with manual override.
The mechanism for the manual override is an option and can
be replaced by a blanking plug.
Valve sections can be varied to suit different types of control.
The centering springs are specied separately.
MF22
Load check valve with adjustable ow limitation.
MF22 maximizes the ow out of a section.
Typical application is a slewing function.
MP22
Plug without load check valve. This option is designed,
for example, when the function is equipped with pilot
operated load holding valves.
ER62 / 64
Functional principle PWM (Pulse Width Modulation)
Duty cycle 100 %
Connection AMP Junior-Power-Timer
Recommended PWM frequency 100 Hz
Protection class IP 65
Ambient temperature -30 °C up to +80 °C
ER62
Rated voltage 12 V DC
Starting current 500 mA
Max. current 1,200 mA
Coil resistance @ +20 °C 4.72 Ohm
ER64
Rated voltage 24 V DC
Starting current 250 mA
Max. current 600 mA
Coil resistance @ +20 °C 20.8 Ohm
The main function of the load
check valve is to prevent
backwards movement of the
load when the load pressure
is higher than the pump
pressure during operation.
MB22
Load check valve.
Note: If used an “on-off”
valve it is recommended to
limit the current e.g. with a
coupling resistance.
Please contact HYDAC
for detailed information.
Load check valve MF22
6
3
2
9
1
3
4
7
5
8
8
23
3
5
7
6
1
9
8
8
A B
A-side
B-side
1 Working section S01G
2 Load check valve MB22
3 Solenoid operated valve for proportional control ER64
4 Spool control, B-side B01
5 Lever mechanism without lever LMA
6 Spool control, A-side 9
7 Centering spring for proportional control PS
8 Service port valve TBD160
9 Spool
Important:
The capacity of the current
source must be higher than
the current demand of all
parallel active solenoids
in order to provide
the PWM effect.
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8
Outlet section U01G
Without internal pilot oil supply function
Outlet section U01G
With high pressure carry-over function
The outlet section U01G
1
is shown equipped for hydraulically
or manually operated sections.
The cavity for the pressure reducing valve is plugged, P63
2
.
The outlet section U01G
1
is shown equipped for hydraulically
or manually operated sections and for high pressure carry-over
function. Note that the carry-over ow is regulated into the
center gallery i. e. the ow determined by the metering orice
of the inlet section. With PF305 this is 25 l/min. The blanking
plug P400
3
is tted. High pressure carry-over ports can be
either T1 or T3. The cavity for the pressure reducing valve is
plugged with blanking plug P63
2
. Only T2 can be used as
tank connection.
If in this case the plug P400 is replaced by the relief cartridge
TBD160, it functions as relief valve for downstream services.
3
3
2
2
1
1
4
4
2
2
3
3
4
4
1
1
T3
T3
T1
T1
T2
T2
TD4
TD4
PT
PT
1 Outlet section U01G
2 Plug P63
3 Plug PK400
4 Plug PG02
1 Outlet section U01G
2 Plug P63
3 Plug P400
4 Plug PG02
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9
Outlet section U01G
With internal pilot oil supply function
The outlet section U01G
1
is shown equipped for use in an
electro-hydraulically operated valve. The outlet is congured
for pilot supply to the valve sections.
An initial pressure is determined by a pilot pressure valve in the
center gallery. Ports T1 and T3 must be plugged.
The pilot pressure is limited by a pressure reducing valve
connected to the parallel gallery. Due to the fact that the
unloading unit in the inlet shuts off the ow supply to the parallel
gallery an emergency stop will also shut off the oil supply to the
pilot circuit.
The return ow from the spool controls and the pressure
reducing valve should be drained directly to tank separate from
other returns. In order to achieve this it is recommended to use
PT and to plug the connection between pilot drain and main
tank line.
3
5
5
6
2
1
42
3
4
1
T3
T1
T2
TD4
PT
1 Outlet section U01G
2 Pilot pressure reducing valve TRA63
3 Pilot pressure valve TMB210/2
4 Plug for isolate pilot drain from ordinary tank line PMS6
5 Plug in T3 PG04
6 Plug in T1 PG06
Pilot pressure valve TMB210/2
The cartridge type pilot pressure valve TMB210/2, normally
set at minimum 14 bar, is used in the outlet section to ensure
available pilot pressure build-up for remote control. Depending
on system design this necessary starting pressure could also
be achieved through downstream arrangements, for example a
support leg check valve.
TMB210/2 is adjustable and sealable.
Pressure reducing valve TRA63
The cartridge type pressure reducing valve TRA63 is used in
the outlet to provide pilot oil supply for remote control.
TRA63 is factory pre-set set at 24 bar which consequently
is the maximum available pressure level in the pilot system.
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10
Spool controls A-side
Spool actuator B-Side
Spool control 9
Spring centering
Spool control LA
External hydraulic kick-out
from spool position III to I
Spool controls
Electro-hydraulic control is achieved
by using spool controls in combination
with solenoid valves ER62 / 64 both
on A-side and B-side.
The control will be proportional
with the PS spring
The control will be on-off
in combination with the MS spring
Hydraulic control is achieved
by using spool controls in combination
with adapters HG10 both on A-side
and B-side.
The control will be proportional
in combination with the PS spring
The control will be on-off
in combination with the MS spring
Spool actuator B01
Cap
Spool actuator LB01
External hydraulic kick-out
from spool position II to I
For sections with lever mechanism
G¼"
46
LA
9
15
Spring – spool control
Type of centering spring must be
specied in the valve conguration
MS spring for manual
operation,
Forces 110 – 130 N
PS spring for proportional
remote control,
Forces 120 – 320 N
Note: Lever mechanism / cavity plugs as
shown in pictures above are independent
items to be congured separately.
G¼"
34.5
11
LB02
B01
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11
Lever mechanism on B-side
Spools – main design parameters
LMA3...LMD3
Mechanism with lever holder but without lever.
The lever MS190 must be ordered as a separate item.
The third letter in the code gives the angle for the assembly
of the lever holder.
LM2
Lever mechanism without lever holder, lock nut and handle.
PM02
Plug replacing lever mechanism.
The RS 220 spools are available in a variety of ows
and styles to accommodate most design requirements.
The spool matrix congurator below will help and guide you
to select the correct spool for your application.
The development of new spools is a continuous process
and not all available spools are described in this data sheet.
For further details on spools please contact HYDAC.
Type: Symbol
Spool 1
Spool 2
Spool 3
Spool 4
Spool 8
Function:
A Standard
S
Slewing spool
X
A-port drained to tank in neutral position
Y
B-port drained to tank in neutral position
Z
A/B-ports drained to tank
in neutral position
Type of application:
A Spool general use
K Crane optimized
L Loader optimized
Detailed requirements:
A Standard
Example:
– Restricted ow
– Asymmetric
– Spool end
Pump ow, Q-inlet:
6 30 – 50 l/min
8 50 – 75 l/min
Spool code
1 6 K A A
LMA3
30°
30°
30°
LMB3
LMC3
LMD3
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12
Service port valves
Port relief valve TBD160
The TBD160 is a differential
area, direct acting relief valve,
for the secondary circuit.
It is adjustable and sealable.
Setting ranges
for TBD / TBSD160:
z 35 – 300 bar
(3.5 – 30.0 MPa)
z Setting range step: 5 bar
Port relief and anticavitation
valve TBSD160
See TBD160 for functional
principle.
TBSD160 is adjustable and
sealable.
Anticavitation valve SB500
The anticavitation valve
ensures that, in the event of a
lower pressure in the cylinder
port than in the tank, oil can
be drawn from the system oil
reservoir, as required.
∆p (bar)
Q (l/min)
Relief characteristics TBD/TBSD160
Anticavitation characteristics TBSD160
Anticavitation characteristic SB500
∆p (bar)
Q (l/min)
∆p (bar)
Q (l/min)
SB500
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13
Typical hydraulic diagrams
Electro-hydraulic remote controlled
valve with internal pilot supply.
Single circuit. Inlet section with ow
control and unloading function.
Hydraulic remote controlled valve.
2
nd
section with 4-position spool.
Single circuit.
Inlet section with ow control but
without unloading function.
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14
Notes
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15
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16
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.
Head Office Industriegebiet
HYDAC INTERNATIONAL 66380 Sulzbach/Saar
GMBH Germany
Tel.: + 49 6897 509 -01
Fax: +49 6897 509- 577
E-mail: mobilevalves@hydac.com
Internet: www.hydac.com