Parker R4V Series Wiring diagram

Bulletin MSG11-5715-661/UK
Operating instructions
Series R4V*V* / R4V*W*
Series R6V*V* / R6V*W*
Series DSDU*1078 E*E TÜV
Translation of German original operating instructions
Series R4V and R6V
Pilot operated pressure relief valve
Subplate mounted
Series DSDU
Pilot operated pressure relief valve
2-way cartridge valves
Parker Hannifin
Manufacturing Germany GmbH & Co. KG
Industrial Systems Division Europe
Gutenbergstr. 38
41564 Kaarst, Germany
Tel.: [phone]
E-mail: [e-mail]
Copyright © 2019, Parker Hannifin Corp.

Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
2Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED
HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY
DAMAGE.
This document and other information from Parker-Hannifin Corporation, its subsidiaries and
authorized distributors provide product or system options for further investigation by users having
technical expertise.
The user, through its own analysis and testing, is solely responsible for making the final selection
of the system and components and assuring that all performance, endurance, maintenance,
safety and warning requirements of the application are met. The user must analyze all aspects
of the application, follow applicable industry standards, and follow the information concerning
the product in the current product catalog and in any other materials provided from Parker or its
subsidiaries or authorized distributors.
To the extent that Parker or its subsidiaries or authorized distributors provide component or
system options based upon data or specifications provided by the user, the user is responsible for
determining that such data and specifications are suitable and sufficient for all applications and
reasonably foreseeable uses of the components or systems.
WARNING — USER RESPONSIBILITY

3
Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
Contents Page
1. Basic information 4
Warnings and symbols 4
General notes 4
Package contents 4
Warranty and liability 4
CE mark 4
Conformity 4
Electronic control system 5
Choice of solenoid 5
Pressure fluids 5
Venting of hydraulic system 5
Flushing 6
Product support 6
2. General notes on safety 6
Use of operating instructions 6
Compliance with other rules and instructions 6
Personnel requirements 6
Use of the product 6
Limits of use 7
Contamination 7
3. Remaining risk 7
Allergic reactions 7
Leaking plugs 7
Lightning 7
Temperature 7
Power failure 7
Pressure relief valve series R4V*V* / R4V*W* / R6V*V* / R6V*W* with vent function 7
4. Correct use 8
5. Function 8
Series DSDU* 8
Series R4V*V* / R4V*W* / R6V*V* / R6V*W* without vent function 8
Series R6V*V* / R6V*W* with vent function 8
6. Transport 8
7. Storage 9
8. Commissioning 9
Installation instructions DSDU* 10
Electrical connections 10
9. Operation 10
10. Troubleshooting 10
11. Modification 12
12. Service / maintenance 12
13. Decommissioning 12
14. Disposal 12
15. Other documentation 13
Other applicable standards / rules 13
Declaration of Conformity 14
16. Technical data 15
Technical data series DDSDU*E* 15
Dimensions series DSDU*E* 15
Mounting Surface 16
Technical data series DR4V*V* / R4V*W* / R6V*V* / R6V*W* 17
Dimensions series R4V* without vent function 18
Dimensions series R6V* without vent function 19
Dimensions series R6V* with vent function 20

Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
4Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
1. Basic information
Warnings and symbols
The following symbols are used to identify impor-
tant information.
Special information about requirements
that must be noted/observed by the user.
Information about a hazard that may
cause injury or damage.
General notes
Technical changes
We reserve the right to make technical changes
as a result of further development of the product
described in these operating instructions. Figures
and drawings in these instructions are simplified
depictions. As a result of developments, improve-
mentsandchangestotheproduct,itispossiblethat
the figures are not fully consistent with the valve
in operation.The technical details and dimensions
are non-binding.They may not form the basis of any
claims. Copyright reserved.
Package contents
The package contents for the products are:
• Series R4V or R6V or DSDU safety valve
• Operating instructions with declaration of
conformity
• Attestation for product acceptance
• Certificate for product acceptance
Warranty and liability
In principle the general terms and conditions of
sale and delivery are applicable.
We cannot accept warranty or liability claims in
respect of personal injury or material damage in
the following circumstances:
• If the product is used other than as specified
• If the installation, commissioning, operation and
maintenance of the product are incorrect
• If the product is used with safety devices that
are defective or not properly installed
• If the operating instructions are not followed with
regard to transport, storage, commissioning,
operation,modification,maintenance/servicing,
decommissioning/removal
• If unauthorised structural changes are made
to the product
• If wear and tear are not properly monitored
• If repairs are carried out incorrectly
• If outages are caused by a third party
If outages are the result of force majeure
CE mark
The CE mark appears on the main nameplate.If the
product is installed as part of a larger machine, this
larger machine is in turn subject to EU directives
andmustthereforeobtainageneralCEmarkfor the
machine as a whole. The machine must not enter
circulation in the EU until this is done.
Conformity
The declaration of conformity (see section 15.
"Other documentation") attests that the products
comply with all essential health and safety require-
ments set out in Annex I of the Machinery Directive
2006/42/EC.
Ifourproduct isusedotherthanas speci-
fied,hazardsmay occurthatcouldnotbe
foreseenbythemanufacturer.Anyresult
loss or damage is not the responsibility
of Parker Hannifin.
If the described product is installed in a
machinethat cameintocirculationbefore
1995, note the following: If the function
has not been changed significantly,
commissioning may not take place until
conformitywithnationaloccupational health
and safety provisions has been established
for the machine as a whole, in particular
those provisions implementing the Use of
Work Equipment Directive
If the function has been changed signifi-
cantly, a newconformityproceduremustbe
carried outinaccordance with theMachinery
Directive 2006/42/EC.

5
Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
Mineral
oil No restrictions
HFA Oil in water
emulsions Mandatory check
HFB Water in oil
emulsions Mandatory check
HFC Water glycols
Possible restric-
tions, recommend-
ed check
HFD Anhydrous fluids
(phosphate ester)
Possible restric-
tions, recommend-
ed check
Pressure fluids
Certain rules apply to valve operation using differ-
ent pressure fluids:
Thedetailsofthevarious pressure fluids
are provided for information only and do
not replace in-house testing under the
applicable operating conditions. In par-
ticular, the details cannot be interpreted
as a guarantee of media compatibility.
For detailed information about pressure
fluids, see VDMA sheet 24317 and DIN
51524, 51502. Special sealing materials
aresupplieddepending onthefluidused.
Please ask the factory if you are unsure.
Electronic control system
Dependent on the concrete type, the valve series
R6V*V* / R6V*W* with vent function requires an
electroniccontrolsystem.The appropriate electronic
control system can be selected from the catalogue
("Electronics" section). Please ask the factory if
you are not clear.
Connecting to an unsuitable electronic
control system may result in irreparable
damage to the valve or the electronic
control system.
Choice of solenoid
The choice of a suitable solenoid is an important
factor in the operational reliability of the valve.
Various valve series are available with several
options for solenoid voltage. If the solenoid can be
adjusted by setting parameters in the electronic
control system, the suitable solenoid options must
be selected.
Note about using valves with 24 V sole-
noids:
Because the coil resistance increases by
up to 40% on heating, the electronic control
system increases the solenoid voltage in
order to keep the set current constant.In the
case of solenoids with a nominal voltage of
24 V, this requires the supply voltage from
the electronic control system to be higher
than 24 V in order to supply the solenoid's
rated current.For example, if solenoids with
nominal data 24 V / 1.3 A are used, the
operating voltage of the electronic control
system may have to be increased to up to
30 V in order to ensure the solenoid is cor-
rectly energised.
For this reason, choose solenoids with
lower voltages!
A suitable tool must be used for manual
emergency actuation of the solenoid.

Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
6Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
Compliance with other rules and in-
structions
Carry out transport and installation/repair activities
only in accordance with the valid and applicable
safety and accident prevention regulations issued
by the trade associations.
The valve contains hydraulic oil. The normal lo-
cal environmental protection requirements must
therefore be met when handling the product.
The particular circumstances of each place of in-
stallation mean that instructions must be followed
in order to install and use the product safely.
Anyhealth and safety warnings attached
to the product must be observed and
must be maintained in a legible state.
Personnel requirements
The product may only be used, installed, removed,
operated and maintained by specialist personnel.
For the purposes of these instructions, a specialist
is defined as someone who, on the basis of their
education, expertise and professional experience,
is able to correctly evaluate and carry out the tasks
and duties assigned to him/her, and identify and
correct potential hazards.
Skilled, semi-skilled or trained personnel may not
use this product under their own responsibility un-
less they have the required specialist knowledge.
Otherwise, they may only use the product under
the constant supervision of a specialist person.
Use of the product
The product must only be used if it is perfect work-
ing order. Problems that may impair safety must
be corrected.
This product is a safety component that
mayonlyberepaired bythemanufacturer
if it malfunctions.
If the safety components are repaired by
the user, the manufacturer's warranty is
invalidated because the manufacturer is
demonstrably unable to ensure that the
product is used as specified.
After a certain period of service, the hydraulic fluid
must be replaced. The frequency of the change
depends on the following circumstances:
• Type and grade of pressure fluid (ageing)
• Filtration
• Operating temperature and ambient conditions
Venting of hydraulic system
The hydraulic system must be vented on initial
commissioning, after an oil change or after lines
or valves are opened.
Flushing
Withlargecentralpressurisedoilstations
in particular, you are recommended to
flush the long pipes by short circuiting
the pressure and return lines. This pre-
vents the dirt occurring during installa-
tion from being carried to the valve.
Product support
If you require further support about the product,
about order processing or about solutions to prob-
lems, please contact your relevant sales company.
2. General notes on safety
Use of operating instructions
We would again like to remind you that
the commissioning and use of our prod-
uct must be based on these operating
instructions.They must
• be followed in full at all times,
• be kept in close proximity to the in-
stalled product, and be accessible at
all times,
• be passed on to any later owners,
• always be used in the version supplied.
The personnel whose job is to work with
this product must have read the operat-
ing instructions – in particular the sec-
tion entitled "General notes on safety"
– before starting work.This specifically
applies to personnel who will only work
withtheproductoccasionally(e.g.setting
up, maintenance).

7
Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
Lightning
If electronic components are exposed
to electromagnetic fields as a result of
lightning,theymustbecheckedto ensure
they are still working perfectly.
Ifthereisa malfunction,the productmust
be returned to the manufacturer.
Temperature
The surface of our product may heat up in use.
The service temperatures may exceed
thetemperaturethreshold forburninjury,
70°C. Above this threshold, even brief
contact with the surface may result in a
burn.
The only way to consistently prevent
burn injuries is to use personal protec-
tive equipment and to remain safety-
conscious at all times.
If integrated electronics are exposed
to a temperature above 80°C, they may
malfunction.
Power failure
Pressure relief valve series R6V*V* / R6V*W*
with vent function
Inapowerfailure,thepressurerelief valve
is automatically depressurised because
theventvalvenolongerreceivescurrent.
You must check whether this creates
potential hazards when the system/
machine is used.
Limits of use
The product may only be operated within the speci-
fied limits of use.The relevant details can be found
in "Technical data" (section 16.).
The ambient conditions must be ob-
served. Unauthorised temperatures,
shocks,the effects of aggressive chemi-
cals,radiation,unauthorisedelectromag-
neticemissionsmayresultin disruptions
and failures.
Observe the limits of operation set out
in "Technical data" (section 16.).
Contamination
The function and service life of the valve are heavily
dependent on the purity and quality of the pressure
fluid and depend upon the operating conditions of
the hydraulic components.
Appropriate filters must be used and regular in-
spections of the medium must be carried out to
prevent contamination of the pressure fluid. The
permitted level of contamination is set out in the
"Technical data".
Be aware of three important sources of
contamination:
• Contaminations entering during instal-
lation
• Contaminationsoccurringduringoperation
• Dirt entering from the surroundings
3. Remaining risk
Allergic reactions
Hydraulic oil can cause allergic reactions on sus-
ceptible skin. This can be prevented by taking the
precautions that are usual when handling min-
eral oil products and by using personal protective
equipment.
Leaking plugs
Leaking plugs can cause a malfunction.
That is why the plugs must be checked
for leaks at the regular maintenance
interval.
Leaking plugs may constitute a safety
hazard, so the valve must be returned
to the manufacturer for repair.

Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
8Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
Series R4V*V* / R4V*W* / R6V*V* / R6V*W* with
vent function
The system pressure in port P (R6V) or port A
(R4V) is applied via the X line to the spring loaded
cone in the pilot head.
If the system pressure exceeds the pilot pres-
sure, the pilot cone opens and thus limits the pilot
pressure. If the system pressure exceeds the pilot
pressure plus the spring force, the main cartridge
opens to the tank port and limits the system pres-
sure to the pressure setting for the valve.
Additionally to the relief function, a solenoid
operated vent valve connects the Z area to tank.
This allows oil circulation from P to T at minimum
pressure drop. The vent position can be either at
the energized or de-energized solenoid.
6.Transport
The low weight of the product means that no lifting
equipment or transport aids are needed.
Our product leaves the factory in perfect working
order, and appropriate packaging is used to protect
it from damage.
As Parker has no influence on the state
the product arrives in, please check for
transport damage/defects immediately
after arrival.
Document the transport damage and im-
mediatelynotify thecarrier,the insurance
company and the manufacturer.
Do not dispose of the packaging unless
• there is no transport damage
• the entire package contents have been
removed from the packaging.
If the product has been damaged during
transport,it mustbeexchanged fora new
one.
When transporting the product within your prem-
ises, make sure it is kept in a safe position and
protected in its original packaging until it is ready
to use.
Note also the information in sections 1. "Warranty
and liability", 2. "Use of operating instructions",
"Compliance with other rules and instructions",
"Personnel requirements" and 3. "Remaining risk".
4. Correct use
Our products are manufactured using state of the
art technology and recognised safety procedures.
These pilot operated pressure relief valves
Series DSDU 1078 E16/-E26/-E32 TÜV
Series R4V*V/R4V*W
Series R6V*V/R6V*W
have a maximum pressure which is preset at the
factory and cannot be changed (lead seal), and are
used for maximum pressure protection.
To guarantee correct operation, these valves
should be integrated in the user system as follows:
• Port P (R6V) or port A (DSDU, R4V) directly at
the point where pressure protection is required
• Port T (RV) or port B (DSDU, R4V) directly at
the unpressurised tank
The nominal sizes of the valve and the connections
must be dimensioned for the maximum occurring
displacement and pressure.
5. Function
Series DSDU*
The system pressure in port A is applied via an
aperture in the main cone to the spring loaded
cone in the pilot head.
If the system pressure exceeds the pilot pres-
sure, the pilot cone opens and thus limits the pilot
pressure. If the system pressure exceeds the pilot
pressure plus the spring force, the main cartridge
opens to the tank port and limits the system pres-
sure to the pressure setting for the valve.
Series R4V*V* / R4V*W* / R6V*V* / R6V*W*
without vent function
The system pressure in port P (R6V) is applied via
the X line to the spring loaded cone in the pilot head.
If the system pressure exceeds the pilot pres-
sure, the pilot cone opens and thus limits the pilot
pressure. If the system pressure exceeds the pilot
pressure plus the spring force, the main cartridge
opens to the tank port and limits the system pres-
sure to the pressure setting for the valve.

9
Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
Storage time: Conditions:
12 months
Stable air humidity 60 % and
stable temperature >5 °C - <25
°C
6 months
Fluctuating air humidity and
fluctuating temperature
>5 °C - <35 °C
Check for foreign objects in the open
hydraulic passages. Contaminations
may impair operational reliability and
shorten the service life.
Make sure that the hydraulic system/
machine is unpressurised before the
product is installed.
Use the nameplate to compare the valve type with
the bill of materials/diagrams.
Take care during installation, to guarantee that
all requirements for the safe use of the product
are met.
Ensure that the sealing rings are seated correctly.
Only use the fastening bolts specified by the manu-
facturer for installing the product (see "Technical
data", section 16.).
Use the correct tool for installing the fastening bolts.
Install the fastening bolts to the torques
specifiedbythemanufacturer(see"Tech-
nical data",section 16).Tighten the bolts
diagonally.
The factory setting for the maximum
pressure must not be changed – "safety
function".
If the lead seal for the pressure setting
is damaged, the product must not be
used until the product-specific pressure
setting has been restored and sealed by
an accredited inspector to prevent the
setting being changed.
Subplate mounted valves must only be
installed as indicated in ISO 6264.
Before commissioning, the specialist
personnel must verify that the entire
hydraulic system has been installed
correctly.
Commissioningmustbe carried out with
care, taking account of all safety regula-
tions.
7. Storage
If the product needs to be temporarily stored, it
must be protected from dirt, the weather, and dam-
age. Each valve is tested with hydraulic oil in the
factory, so that the internal components are pro-
tected from corrosion.However, this protection can
only be guaranteed under the following conditions:
The product is delivered with adequate corrosion
protection, provided our recommendations for the
ambient conditions are followed.
Storageoutsideorinmaritime or tropical
climates without appropriate packaging
leads to corrosion and may make the
product unusable.
Make sure the product is stored so that
no injuries can be caused by tipping or
falling. In particular, make sure that the
safety rules for high-bay racking are
followed.
8. Commissioning
After installing our product in a system/machine,
make sure that the requirements of the Machinery
Directive are met if applicable.
Access should be provided to the hydraulic dia-
gram, the equipment list and the logic diagram
for the system/machine. The hydraulic diagram
must contain the design pressure settings for all
pressure valves.
The product must be checked for dam-
age and missing parts (e.g.seals) before
installation, especially in the area of the
sealing surfaces and the safety devices.
If the safety devices or sealing surfaces
are damaged or are missing individual
parts with relevance to the product's
function, the product may not be used.
Remove all transport securing devices,
protective covers and packaging.

Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
10 Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
9. Operation
Ifanyof the safetyfeaturesof the product
are not operational,the system/machine
must be shut down immediately.
Do not carry out any activities that might
jeopardise safety.
Note also the information in sections 1. "Warranty
and liability", 2. "Use of operating instructions",
"Compliance with other rules and instructions",
"Personnel requirements" and 3. "Remaining risk".
10.Troubleshooting
A systematic approach must always be used in the
troubleshooting process. Begin by answering the
following questions:
• Does anyone have practical experience of
similar faults?
• Have any of the settings been changed in the
system/machine?
• Was the system/machine in perfect working
order before the fault occurred?
The following list contains the problems that are
possible in our view:
If necessary, erect warning signs to prevent unin-
tended operation.
Note also the information in sections 1. "Warranty
and liability", 2. "Use of operating instructions",
"Compliance with other rules and instructions",
"Personnel requirements" and 3. "Remaining risk".
Installation instructions DSDU*
The valve as packed consists of several individual
parts, which are packed separately. When remov-
ing the product from the packaging, make sure no
parts fall out. Falling parts may cause injury or be
damaged.
Before installation, check the outer O-rings to en-
sure they are intact and complete. Damaged parts
of O-rings may impair the function of the valve and
must not be installed.Lifting and installation equip-
ment should be used as necessary for installation/
removal.
To facilitate installation and to prevent damage
caused by detachment, all outer O-rings and back-
up rings must be moistened with hydraulic fluid.
Start by inserting the cartridge unit (sleeve, cone,
spring, locating ring) into the hole. Then place the
cover onto the valve and tighten all bolts diagonally
and evenly in several passes, to the torque speci-
fied by the manufacturer.The first time the valve is
pressurised, check the sealing surface for leaks.
Electrical connections
Before commissioning
• all electrical connections must be made profes-
sionally, using suitable ducting,
• parts of the machine and individually installed
components must be adequately earthed,
• all limit switches and control elements must
be properly integrated with the control system.

11
Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
Problem / Error message Possible cause Actions
The maximum pressure is
exceeded in the machine
The safety valve does not per-
form its specified function
Shut down the system/machine
immediately. Return the valve to
the manufacturer
The pressure setting is not
reached in the machine
Malfunction of safety valve.
Malfunction of R4V vent valve if
there is one
Check safety valve. If there is
a malfunction, shut down the
system/machine immediately.
Return the valve to the manu-
facturer
Valve seizes Contamination Return the valve to the manu-
facturer
Check the pressure fluid and
filter in the system/machine,
and replace if necessary
No pressure or insufficient
pressure
Wrong pressure setting for
R4V*V* and R6V*V* (below
maximum pressure)
Valve does not close because
of dirt or a defect
Set the valve to a higher pres-
sure if possible. Otherwise
return the valve to the manu-
facturer
Leakage at the valve O-ring at the mating flange
leaking or missing
Shut down the system/machine
immediately. Replace the O-ring
Plug, plunger tube or case
leaking
Shut down the system/machine
immediately. Replace the valve
with a new one of the same
series
Valve does not switch on Valve not correctly wired Check the electrical connec-
tions
No electrical signal from gen-
eral control system
Check the control system
Defective coil Measure coil resistance. Re-
place defective coil
Piston jams Check the operating conditions.
Check the torques of the fasten-
ing bolts
If the operating conditions and
the torques are correct, return
the valve to the manufacturer
for inspection.
Valve does not switch off Electrical control system for the
coil not deactivated
Check the control system
Operating conditions incorrect Check the operating conditions
Silting effect Check the purity of the medium
– if necessary improve filtering
and replace the medium
Actuate the valve periodically
Broken spring Return the valve to the manu-
facturer for inspection
Pilot oil discharge interrupted Check pilot oil discharge and
delivery

Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
12 Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
13. Decommissioning
Make sure that the hydraulic system/
machine is unpressurised before the
product is removed.
Note also the information in sections 1. "Warranty
and liability", 2. "Use of operating instructions",
"Compliance with other rules and instructions",
"Personnel requirements" and 3. "Remaining risk".
14. Disposal
At the end of the service life of this
product
• all escaping pressure fluids must be
removed and disposed of properly
• any significant fluids remaining in the
productmustberemovedanddisposed
of properly
• all materials must be segregated for
recycling when they are removed and
taken to a suitable recycling centre.
Please segregate the packaging material properly
(e.g. paper, plastic).
None of the components of the product contain
hazardous materials.
• Thenormallocalenvironmentalprotec-
tion laws must always be met when
disposing of the product.
Note also the information in sections 1. "Warranty
and liability", 2. "Use of operating instructions",
"Compliance with other rules and instructions",
"Personnel requirements" and 3. "Remaining risk".
11. Modification
We define modification as the replacement of a
defective valve with a new valve of the same series.
Make sure that the hydraulic system/
machine is unpressurised before the
product is installed/removed.
Note also the information in sections 1. "Warranty
and liability", 2. "Use of operating instructions",
"Compliance with other rules and instructions",
"Personnel requirements" and 3. "Remaining risk".
12. Service/maintenance
Regular maintenance is essential in prolonging the
service life of the system/machine, and safeguards
plant safety and the operational availability of all
components.
Regular maintenance intervals must be adhered
to, according to the cycles established for the user.
Theminimummaintenancerequirements
for our products are visual inspections
• to check the lead seal of the pressure
setting
• to check for leaks
Make sure that the hydraulic system/
machine is unpressurised before the
product is installed/removed.
If the product is removed from the sys-
tem/machine for maintenance work, the
system/machine must be disabled so it
cannot be switch on unexpectedly.
Note also the information in sections 1. "Warranty
and liability", 2. "Use of operating instructions",
"Compliance with other rules and instructions",
"Personnel requirements" and 3. "Remaining risk".

13
Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
15. Other documentation
Other applicable standards / rules
• 2014/68/EU
Pressure Equipment Directive
• 2006/42/EC
Machinery Directive
• 2014/35/EU
Low Voltage Directive
• ISO 4406:1999-12
Hydraulic fluid power - Fluids - Method for
coding the level of contamination by solid
particles
• ISO 6264:1998-03
Hydraulic fluid power - Pressure relief valves -
Mounting surfaces
• DIN EN ISO 4126-4:2013-12
Safety devices for protection against exces-
sive pressure - Part 4: Pilot-operated safety
valves
• DIN EN 60204-1:2007-06; VDE 0113-1:2007-
06
Safety of machinery – Electrical equipment of
machines – Part 1: General requirements
• DIN EN 60529:2014-09; VDE 0470-1:2014-09
Degrees of protection provided by enclosures
(IP code)
• ISO 4401:2005-07
Hydraulic fluid power - Four-port directional
control valves - Mounting surfaces
• DIN 51524-1:2017-06
Pressure fluids - hydraulic oils - Part 1: hy-
draulic oils HL; Minimum requirements
• DIN 51524-2:2017-06
Pressure fluids - hydraulic oils - Part 2: hy-
draulic oils HLP; Minimum requirements
• AD 2000-Merkblatt W 3/1:2015-11
Cast iron materials - Cast iron with lamellar
graphite (grey cast iron) non-alloy and low
alloy
• AD-2000-Regelwerk W3/2:2015-11
Spheroidal-graphite cast iron, non-alloy and
low alloy

Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
14 Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
EC Declaration of Conformity / Translation from German
2006/42/EC
Mr Günther Funk is authorised to compile the technical file.
For enquiries, see the company address.
Parker Hannifin Manufacturing Germany GmbH & Co. KG declares that the safety valves
Type R4V*V and R4V*W
Type R6V*V and R6V*W
Type DSDU 578 P20E TÜV and DSDU 1078 E*E TÜV
fulfil all the relevant provisions of the
Machinery Directive 2006/42/EC
and
also fulfil all the relevant provisions of the following EC Directives:
Pressure Equipment Directive 97/23/EC
The valves have been approved for module G / category IV / fluid group 1 as defined in the Pressure Equipment
Directive 97/23/EC, by
TÜV Industrie Service GmbH
Gottlieb-Daimler-Str. 7
70794 Filderstadt
ID 0036
Harmonised standards applied:
DIN EN ISO 4126-4:2004-05 Safety devices for protection against excessive pressure
DIN EN 60529:2000-09 Degrees of protection provided by enclosures (IP code)
National standards and technical specifications applied:
VDTÜV Merkblatt Sicherheitsventil 100 (Safety Valves)
AD-2000-Regelwerk W3/2 - Spheroidal-graphite cast iron, non-alloy and low alloy
Place, Date: Kaarst, 11.07.2011
Signature:
The undersigned: Hansgeorg Kolvenbach / Business Unit Manager Industrial Valves
Parker Hannifin
Manufacturing Germany GmbH & Co. KG
Hydraulic Controls Division Europe
Gutenbergstrasse 38
41564 Kaarst, Deutschland
Any unauthorised structural change or
addition to the product may jeopardise
safety to an unacceptable degree. This
would invalidate the declaration of con-
formity supplied with the product.
Declaration of Conformity

15
Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
H
1
XY
A
B
L
B
4
H
39.5
Size H H1B L
E16 141 85 79* 162
E25 162 90 85 156
E32 182 97 102 162
General
Size E16, E25, E32
Interface Slip-in to DIN ISO 7368
Mounting position As desired, horizontal mounting preferred
Ambient temperature [°C] -20…+60
MTTFDvalue [years] 75
Weight [kg] E16 = 2.2 / E25 = 3.5 / E32 = 4.9
Hydraulic
Max. operating pressure [bar] Ports A and X 350, B and Y depressurised
Pilot oil external/external
Pressure setting [bar] See ordering information
Nominal flow [l/min] See ordering information
Fluid Hydraulic oil according to DIN 51524
Fluid temperature [°C] -10...+70
Viscosity, permitted cSt /
Recommended cSt /
[mm2/s]
[mm2/s]
20…400
30…80
Filtration ISO 4406; 18/16/13
Installa-
tion NG NBR FPM
Mounting
16
25
32
BK414
BK391
BK415
4x M8x40 ISO 4762-12.9
4x M12x50 ISO 4762-12.9
4x M16x55 ISO 4762-12.9
31,8 Nm
108 Nm
264 Nm
SK-DSDU10E16
SK-DSDU10E25
SK-DSDU10E32
SK-DSDU10E16V
SK-DSDU10E25V
SK-DSDU10E32V
* Width 65 mm
Dimensions DSDU*E*E
16.Technical data
Series DSDU*E*
Technical data

Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
16 Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
NG b1 d1 H7 d2 H7 d3 d3 max d4 d4max* d5max d6 d7 H13 m1±0.2 m2±0.2 m3±0.2
16 65 32 25 16 18 16 25 4 M 8 4 46 25 23
25 85 45 34 25 25.5 25 32 6 M 12 6 58 33 29
32 102 60 45 32 36 32 40 8 M 16 6 70 41 35
NG m4±0.2 t1+0.1 t2+0.1 t3 t4 t4 max* t5 t6 t7 t8 t10 U W
16 10.5 43 56 11 34 29.5 20 20 2 2 10 0.03 0.05
25 16 58 72 12 44 40.5 30 25 2.5 2.5 10 0.03 0.05
32 17 70 85 13 52 48.0 30 35 2.5 2.5 10 0.03 0.1
Surface quality:
= Rmax16, =
√
12√Rmax8
DIN NG ISO code
16 7368-BA-06-2-B
25 7368-BB-08-2-B
32 7368-BC-09-2-B
* only with d4max and t4max
Comparison of DIN NG and ISO code
t4
d4
d3
d2
15°
t3 and t5
depth of fit
1
2
15°
d1
12
2
t7
t5
t1
t2
t8
t3
d6
m3
d5
m1
m1
m2
thread depth t6
XY
m2
b1
m2
d7
m4
pin t10
b1
m2
Mounting Surface

17
Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
R*V without vent function
General
Nominal size 10 25 32
Interface Subplate mounting acc. ISO 6264
Mounting position as desired, horizontal mounting prefered
Ambient temperature [°C] -20...+60
MTTFDvalue [years] 75
Weight Series R6V
Series R4V
[kg]
[kg]
-
2.7
5.8
4.5
7.8
6.0
Hydraulic
Max. operating pressure [bar]
[bar]
Ports P (or A) and X up to 350,
Port T (or B) and Y 30
Pressure stages [bar] 350
Max. flow Series R6V
Series R4V
[l/min]
[l/min]
-
110
500
450
500
500
Fluid Hydraulic oil according to DIN 51524
Fluid temperature [°C] -10...+70
Viscosity, recommended [cSt] /
permitted [cSt] /
[mm²/s]
[mm²/s]
20…400
30…80
Filtration ISO 4406; 18/16/13
R*V with vent function
General
Nominal size 25 32
Interface Subplate mounting acc. ISO 6264
Mounting position as desired, horizontal mounting prefered
Ambient temperature [°C] -20...+60
MTTFDvalue [years] 75
Weight Series R6V [kg] 7.2 9.2
Hydraulic
Max. operating pressure [bar]
[bar]
Ports P and X 350,
Port T and Y 30
Pressure stages [bar] 350
Max. flow Series R6V [l/min] 500 500
Fluid Hydraulic oil according to DIN 51524
Fluid temperature [°C] -10...+70
Viscosity, recommended [cSt] /
permitted [cSt] /
[mm²/s]
[mm²/s]
20…400
30…80
Filtration ISO 4406; 18/16/13
Serie R4V*V* / R4V*W* / R6V*V* / R6V*W*
Technical data
Electrical
Duty ratio [%] 100 ED; CAUTION: coil temperature up to 150 °C possible
Protection class IP 65 in according with EN 60529 (plugged and mounted)
Code G0R G0Q
Supply voltage [V] 12 V = 24 V =
Supply tolerance [%] ±10 ±10
Power consumption hold [W] 32.7 31
in rush [W] 32.7 31
Connector Connector to EN 175301-803
Wiring min. [mm2] 3 x 1.5 recommended
Wiring length max. [m] 50 recommended

Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
18 Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
X6
Y5
Ød3xt3
X5
Y3
Ød1
X2
X4
X3
X1
Y1
Y2
Ød2
Ød2
Y4
d4xt4
X
AB
Y
Ød5
Ød6
H2
H5
H1
L4
L6
Acorn nut
leaded
L1
B2
L2
B1
Hand knob
leaded
NG ISO-Code d1max d2max d3 t3 d4 t4 d5 d6
10 6264-06-07-*-97 15 7 7.1 8 M10 16 10.8 17
25 6264-08-11-*-97 23.4 7.1 7.1 8 M10 18 10.8 17
32 6264-10-15-*-97 32 7.1 7.1 8 M10 20 10.8 17
NG ISO-Code x1 x2 x3 x4 x5 x6 x7 y1 y2 y3 y4 y5 y6
10 6264-06-07-*-97 42.9 35.8 21.5 – 7.2 21.5 – 66.7 58.8 33.4 7.9 14.3 –
25 6264-08-11-*-97 60.3 49.2 39.7 – 11.1 20.6 – 79.4 73 39.7 6.4 15.9 –
32 6264-10-15-*-97 84.2 67.5 59.5 42.1 16.7 24.6 – 96.8 92.8 48.4 3.8 21.4 –
R4V without vent function
NG Surface finish NBR FPM
10 BK505 4x M10x35 ISO 4762-12.9 63 Nm ±15% S26-58507-0 S26-58507-5
25 BK485 4x M10x45 ISO 4762-12.9 63 Nm ±15% S26-58475-0 S26-58475-5
32 BK506 6x M10x45 ISO 4762-12.9 63 Nm ±15% S26-58508-0 S26-58508-5
Tolerance at X and Y pin holes and screw holes ±0.1, at port holes ±0.2.
NG ISO-Code B1 B2 H1 H2 H3 H4 H5 H6 L1 L2 L3 L4 L5 L6
10 6264-06-07-*-97 87.3 33.35 83 21 – – 62.5 – 25 90.8 – 143 – 144.8
25 6264-08-11-*-97 105 39.7 107.5 29 – – 87 – 30.9 123 – 143 – 144.8
32 6264-10-15-*-97 120 48.4 120 30 – – 99.5 – 29.8 143.5 – 143 – 144.8
Dimensions

19
Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
L2
Ød5
H6
Ød6
L1
H2
H3
H1
L6
H5
X7
Ød3xt3
B2
L3
B1
Ød2
X
Y
P
X5
X3 X2
X1
Y3
T
Ød1
Y1
d4xt4
Hand knob
leaded
Acorn nut
leaded
L4
R6V without vent function
NG ISO-Code d1max d2max d3 t3 d4 t4 d5 d6
25 6264-08-13-*-97 23.4 6.3 7.5 10 M16 27 17.5 25
32 6264-10-17-*-97 32 6.3 7.5 10 M18 28 20 30
Y: external drain port
G 1/8“
NG ISO-Code x1 x2 x3 x4 x5 x6 x7 y1 y2 y3 y4 y5 y6
25 6264-08-13-*-97 66.7 55.6 23.8 – 11.1 – 33.4 70 – 35 – – –
32 6264-10-17-*-97 88.9 76.2 31.8 – 12.7 – 44.5 82.6 – 41.3 – – –
Tolerance at X and Y pin holes and screw holes ±0.1. at port holes ±0.2.
NG Surface finish NBR FPM
25 BK366 4x M16x70 ISO 4762-12.9 264 Nm ±15% S26-96396-0 S26-96396-5
32 BK507 4x M18x75 ISO 4762-12.9 398 Nm ±15% S26-96392-0 S26-96392-5
NG ISO-Code B1 B2 H1 H2 H3 H4 H5 H6 L1 L2 L3 L4 L5 L6
25 6264-08-13-*-97 100 35 117.5 46.5 91.5 – 25 12 37.9 124.5 141 148,3 – 36.5
32 6264-10-17-*-97 120 41.3 124.5 51,3 98,5 26.5 13.5 44.3 153 141 148,3 – 46.5
Dimensions

Pilot Operated Pressure Relief Valves
Series R4V*/R6V*/DSDU*
20 Parker Hannifin CorporationParker Hannifin Corporation
Translation from German
R_V-DSDU 5715-661 UK.indd 11.12.19
H2
L5
Ød6
Ød5
30
H3
H4
L2
L1
H1
15
X7
X3
L3
B2
B1
X
Y
P T
X5
Ød1
Y1
Y3
X2
X1
H5
L6
H6
Ød3xt3
Ød2
d4xt4
Hand knob
leaded
Acorn nut
leaded
Y: external drain port
G 1/8“
R6V with vent function
NG ISO-Code x1 x2 x3 x4 x5 x6 x7 y1 y2 y3 y4 y5 y6
25 6264-08-13-*-97 66.7 55.6 23.8 – 11.1 – 33.4 70 – 35 – – –
32 6264-10-17-*-97 88.9 76.2 31.8 – 12.7 – 44.5 82.6 – 41.3 – – –
Tolerance at X and Y pin holes and screw holes ±0.1. at port holes ±0.2.
NG ISO-Code d1max d2max d3 t3 d4 t4 d5 d6
25 6264-08-13-*-97 23.4 6.3 7.5 10 M16 27 17.5 25
32 6264-10-17-*-97 32 6.3 7.5 10 M18 28 20 30
NG Surface finish NBR FPM
25 BK366 4x M16x70 ISO 4762-12.9 264 Nm ±15% S26-96396-0 S26-96396-5
32 BK507 4x M18x75 ISO 4762-12.9 398 Nm ±15% S26-96392-0 S26-96392-5
NG ISO-Code B1 B2 H1 H2 H3 H4 H5 H6 L1 L2 L3 L4 L5 L6
25 6264-08-13-*-97 100 35 206.9 46.5 91.5 139.8 25 12 37.9 124.5 163.8 141 – 36.5
32 6264-10-17-*-97 120 41.3 213.9 51.3 98.5 146.8 25 12 44.3 153 163.8 141 – 36.5
Dimensions