Argo-Hytos PVRMX3-103 User manual

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ARGO-HYTOS s.r.o.
Dělnická 1306, CZ 543 01 VRCHLABÍ
[email protected] + 420 499 403 111
The following is the authorised translation of original operating instruction PVRMX3-103 no. 15184_1cz_04/2022
issued by the producer:
PROPORTIONAL PRESSURE CONTROL VALVE,
REDUCING - RELIEVING, DIRECT-ACTING
DESIGNED FOR USE IN EXPLOSIVE ENVIRONMENTS
PVRMX3-103
OPERATING INSTRUCTIONS
TP
ACZ
Important! Read the instructions before using the product.
Save the instructions for future reference.
If the operating instructions are lost, new ones can be found on the ARGO-HYTOS website www.argo-hytos.com

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Contents of operating instructions
Chapter Page
Declaration of conformity 2
Overview of signal words and warning signs used in the text 6
Overview of the symbols and signs used in the text 6
Glossary of technical terms used 6
1. Use of the product 6
2. Valve protection against intitiation of explosion in explosive atmospheres 7
2.1 Protection of electrical parts 7
2.2 Cable grommet 7
2.3 Protection of non-electrical parts 7
2.4 Applicable legislation and standards 7
3. Risks and limitations of product use 8
3.1 Risks associated with operating in explosive atmospheres 8
3.2 Risks associated with the hydraulic part of the valve 8
3.3 Risks associated with the electrical part of the valve 8
4. Product description 9
4.1 Materials used 9
4.2 Surface protection against corrosion 9
4.3 Basic technical parameters 9
4.4 Working fluid 10
4.5 Valve characteristics 10
4.6 Legislation and standards 10
5. Product modifications 11
6. Target group of users 11
7. Operating instructons broken down into product life stages 11
7.1 Transport and storage of the product 11
7.2 Installation of the product 11
7.2.1 Electrical connection of coils 12
7.2.2 Connecting the valve to the hydraulic circuit 13
7.3 Commissioning 15
7.4 Normal operation 15
7.5 Extraordinary and emergency situations 15
7.6 Repairs carried out by specialist 16
7.6.1 Replacing a faulty valve 16
7.6.2 Replacing the sealing rings at the base of the valve body 17
7.6.3 Replacing the coil 17
7.7 Product maintenance 17
7.8 Spare parts supplied 18
7.9 Product disposal 19
8. Manufacturer contact 19
Mandatory traceability
Related documents:
Product catalogue: Screw-in proporcional pressure reducing - relieving, Direct-Acting valve PVRMX3-103 (no. 5184)
Datasheet: General Technical Information (GI no. 0060)
Datasheet: Operating instructions for valves for use in potentially explosive atmospheres (no. 4090)
Spare parts catalogue sheet (SP no. 8010)
Product catalogue: Tools for machining chambers for screw-in valves (SMT no. 0019)
1. Based on legislative requirements, all operators in the logistics chain, from the manufacturer of the certified Ex solenoid coil to the end user
of the complete equipement, are obliged to make and maintain traceability records of Ex products, enabling, if necessary, the withdrawal
of products of certain serial numbers from the market due to defects of non-conformities, endangering safety of use in an explosive
atmosphere. In practice, this means keeping records of the assignment of Ex coil/valve identification numbers to the identification numbers
of the operators immediately down the logistics chain.
2. To meet the requirement for traceability of Ex products, it is necessary to keep product type labels legible throughout their technical life.

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An overview of signal words and warning signs used in the text
An overview of other symbols and abbreviations used in the text
Symbol, designation Description of the meaning of the symbol, designation
AC, DC Designation for alternating (AC) and direct (DC) current, voltage
ATEX Explosive Atmospheres
EPL Equipment Protection Level (see EN 60079.0)
IEC International Electrotechnical Commission
NBR Rubber used for the manufacture of seals
PA Polyamide
PE Polyethyline
PU Polyurethane
Glossary of technical terms used
›A hydraulic mechanism is one in which energy is transmitted via the compressive energy of the working fluid.
›The volumetric flow rate Q s the amount of liquid in volume units that flows through a given flow cross-section per unit time (SI unit is m3s-1,
in practice the unit l/min is used)
›The control solenoid is designed to reposition the valve spool that interconnects or closes the channels in the body. The solenoid consists of
an excitation coil which, by passing an electric current through the winding, generates a magnetic field which exerts a force on the armature of
the mechanical control system.
›A pressure relief valve is a valve designed to control pressure. It reduces the input pressure to a set value and keeps the output pressure constant.
In addition, the three-way version, protects the output branch of the hydraulic circuit, usually leading to the appliance, against overpressure.
›The screw-in valve is designed to be screwed into a moulded chamber in the hydraulic block. The valve body is replaced by a steel sleeve in
which the spool or cone moves.
›Pressure is the force acting per area unit (SI unit Pascal (1 Pa = Nm-2), in practice the unit used is bar (1bar = 0,1MPa)
1. Use of product
The PVRMX3-103 hydraulic valve is a proportional pressure reducing valve, directly controlled by a solenoid. The valve is designed to be screwed
into a form chamber in a block with metric connection thread M24x1,5. The shape and dimensions of the screw-in chamber comply with the
technical standard ISO 7789. When flowing towards the appliance (port A), the pressure reducing valve reduces the value of the input pressure from
the source-pump (channel P) to the set value of the output pressure and keeps it constant. The value of the reduced pressure is adjusted by a
solenoid in proportion to the control current signal through the solenoid. If the appliance is pressurised, for example by an excessive external force,
the valve closes the pressure input from the pump and relieves the appliance branch by connecting it to the tank (port T)
Valves with ATEX certification according to Directive 2014/34/EU and IECEx certification according to IECEx OD 009 and related harmonized
standards may be used in explosive atmospheres consisting of mine gas, gas or dust. The valves are marked with the CE Ex mark of conformity and
are accompanied by a Declaration of Conformity.
Use in explosive atmospheres:
Class I, mines, where the explosive atmosphere of mine gas is prodominantly methane
The valve has a high degree of protection (EPL = Mb), which makes iniation unlikely during the interval between gas discharge and valve shutdown.
It is designed for category M2 devices that remain off after gas discharge.
Class II, where the explosive atmospere consists of gasses other than mine gas
The valve has a high degree of protection (EPL = Gb) which allows the valve to be used in zones 1 and 2. There is a risk of explosion.
The valve is certified for all gas groups - IIA (typical is methane), IIB (typical is ethylene) and IIC (typical is hydrogen).
Class III, where the explosive atmosphere consists of dust and combustible flammable particles The valve has a high degree of protection (EPL = Db)
which allows the valve to be used in zone 20. There is a risk of explosion. The valve is certified for all dust groups - IIIA (combustible flying particles),
IIIB (non-conductive dust) and IIC (conductive dust).
CLASS I – MINES CLASS II (IIG) - GAS CLASS III (IID) - DUST
Category M1 – NO Zone 0 - NO Zone 20 - NO
Categorie M2
(the device remains
switched off)
Zone1
Zone2
IIA (methane) Zone 21
Zone 22
IIIA (combustible particles)
IIB (acetyline) IIIB (non-conductive dust
IIC (hydrogen) IIIC (conductive dust)
Area of application
DANGER Signal word combined with a warning sign used to signify that a dangerous situation which could result in
death or serious injury is imminent.
WARNING Signal word combined with a warning sign used to signify a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
CAUTION Signal word combined with a warning sign used to signify the occurrence of a potentially dangerous situation
that could result in death or serious injury if not avoided.

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Temperature class
The valves are only supplied with a coil with a nominal power input of 18 W for functional reasons.
The surface temperature of the coil meets the conditions of class T4 with a maximum surface temperature of 135 °C.
The use of the valve in the temperature class is subject to the maximum supply voltage of the coil not being exceeded, the working
fluid temperature not being exceeded and the ambient temperature not being exceeded (see Table 4.4 Basic technical parameters)
The basic type of protection is to pot the coil with potting compound „m“ (EN 60079-18, IEC 60079-18).
In addition, a fixed „t“ closure is used for dust (EN 60079-31, IEC 60079-31).
2. Valve protection against intitiation of explosion in explosive atmospheres
2.1 Protection of electrical parts
The electrical part of the valve is an ATEX and IECEx certified solenoid coil.
The basic type of protection is to pot the coil with potting compound „m“ (EN 60079-18, IEC 60079-18). For a DC-powered coil, protection is
combined by potting the coil with „m“ using a terminal block with „e“ certification (EN 60079-7, IEC 60079-7).
In addition, a fixed „t“ closure is used for dust (EN 60079-31, IEC 60079-31).
EPS14ATEX1744 X IECEx EPS14.0064 X
DC
l M2 Ex eb mb I Mb Ex eb mb I Mb
lI 2G Ex eb mb IIC T4 Gb Ex eb mb IIC T4 Gb
lI 2D Ex tb IIIC T135°C Db Ex tb IIIC T135°C Db
2.2 Cable grommet
The cable grommet is a separately certified component with ATEX and IECEx certification:
I M2 Ex eb I Mb
II 2G Ex eb IIC Gb
II 2D Ex tb IIIC Db
2.3 Protection of non-electrical
2.4 Applicable legislation and standards
The valve complies with the relevant requirements of legislation and standards:
Directive 2014/34/EU (harmonized NV 116/2016) Equipment for potentially explosive atmospheres (ATEX)
IECEx OD 009 Operational Document
Standards used to assess the conformity of the electrical parts:
CENELEC EN IEC 60079-0
Explosive atmospheres – Part 0: Equipment – General requirements
EN 60079-7, IEC 60079-7
Explosive atmospheres – Part 7: Equipment protection by increased safety „e“
EN 60079-18, IEC 60079-18
Explosive atmospheres – Part 18: Equipment protection by encapsulation „m“
EN 60079-31, IEC 60079-31
Explosive atmospheres – Part 31: Equipment dust ignition protection by enclosure „t“
Area of application:
The non-electrical part of the valve consists of the hydraulic part and the solenoid control system.
The safety of the non-electrical parts has been ensured and assessed according to ISO 80079-36, ISO 80079-37 and EN ISO/IEC 80079-38.
› The moving parts, the spool/cone, armature and pin of the control system, perform a sliding motion in a space separated by a seal from
the surrounding environment and flooded with working fluid.
› Not exceeding the maximum surface temperature of the given temperature class is conditioned by not exceeding the maximum temperature
of the working fluid (70 °C), the maximum ambient temperature (see table 4.4 Basic technical parameters) and the nominal voltage of the coil.
› The valve body and spool body are of robust construction, sufficiently resistant to destruction by mechanical shock.
(Valve body impact resistance test performed according to EN IEC 60079-0 paragraph 26.4.2: two impacts with a weight with a hardened head of
diameter D25 mm, weighing m = 1 kg, falling from a height of 0.7 m, with a total potential energy of 7 J)
› The hydraulic section has sufficient compressive strength, tested at 1.5 times the maximum operating pressure of the fluid.
› The valve surface is grounded by a grounding screw and protected against static electricity discharge.
› The construction materials used meet the requirements for limited content of certain elements to prevent the formation of electrical cells and
excessive corrosion.
› The surface materials used do not create sparks during mechanical impacts.
FTZÚ 22 ATEX 0032X, IECEx FTZÚ 22.0004X
Non-electrical part
of the valve
I M2 Ex h I Mb
II 2G Ex h IIC T4, T5, T6 Gb
II 2D Ex h IIIC T135°C, T100°C, T85°C Db

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DANGER
Maximum operating pressure
The valves may be used for a maximum input working fluid pressure of 90 / 50 bar (see 4.3 Basic technical
parameters). If the maximum pressure is exceeded, there is a risk of unreliable valve operation and damage to
the valve.
WARNING
Valve installation
The valve may only be installed in the corresponding chamber. The seals must not be damaged. The valve must
be tightened to the specified tightening torque of 15 + 2 Nm. Otherwise, there is a risk of leakage of the
working fluid and pressure release of the valve. (For details see paragraph 7.2 Product installation)
CAUTION
Maximum operating temperature
The maximum operating temperature must not exceed the temperature range allowed in paragraph 4.4 Basic
technical parameters or in the product catalogue. Both the temperature of the operating fluid and the ambient
temperature significantly influence:
a) the surface temperature of the valve
b) the temperature of the solenoid coil winding - there is a risk of a reduction in hydraulic performance
c) the seal material - risk of seal damage and leakage of the working fluid.
CAUTIONÍ
Surface temperature of the valve
The surface temperature of the valve can exceed 100 °C due to the temperature of the working fluid and
pressure loss in the valve being converted to heat. Do not touch the surface of the valve when the circuit is
operational, even after switching off. Wait until it has cooled down to a safe temperature. There is a risk of
burns.
CAUTION
Working fluids used
Valves may only be used for normal working fluids, especially hydraulic oils (see chapter 4. Product description).
It is forbidden to use the following as working fluids, in particular:
› water and aquesous solutions that will cause corrosion and loss of valve function
› liquids which are flammable or explosive, the heating of which may cause fire or explosion when
passing through the valve
› aggresive liquids (e.g. acids and hydroxides) which will cause damage to the valve and loss of
function.
The flash point of the used working fluid must be at least 50 K higher than the maximum allowed of surface
temperature of the valve in the given temperature class.
3. Risks and limitations of product use
3.1 Risks associated with operating in explosive atmospheres
3.2 Risk associated with the hydraulic part of the valve
For the conformity assessment of the non-electrical part, the following standards were used:
EN 1127-1
Explosive atmospheres – Explosion prevention and protection – Part 1: Basic concepts and methodology
ISO 80079-36
Explosive atmospheres – Part 36: Non-electrical equipment for explosive atmospheres – Basic method and requirement
ISO 80079-37
Explosive atmospheres – Part 37: Non-electrical equipment for explosive atmospheres – Non-electrical type of protection constructional safety „c“,
control of ignition sources „b“. liquid immersion „k“
EN ISO/IEC 80079-38
Explosive atmospheres – Part 38: Equipment and components in explosive atmospheres in underground mines
DANGER
Electrical shock
The solenoid coil is an electrical device that should be connected by a person with appropriate electrical
qualifications. Before connecting the solenoid, check the parameters of the power supply, the integrity of the
cable and the solenoid
CAUTION
Electrical supply values
The solenoid coil is energised by the electrical current passing through the winding. The values of the electrical
supply must not exceed the values indicated on the coil. There is a risk of losing solenoid function.
3.3 Risks associated with the electrical part of the valve
DANGER
Explosive atmosphere type and zone
The valve must not be used outside the specified range (see paragraph 1Product use ), in particular it is not
intended for equipment category M1group l (mines) zone 0 group II (gases) and zone 20 group III (dust).
Risk of explosion.
DANGER
Surface temperature
When selecting the valve, the surface temperature requirement of the valve must be taken into account.
It must be min. 25 °C lower than the temperature necessary to initiate an explosion of an explosive
atmosphere of a given composition. If the initiation temperature is exceeded an explosion will occur.
DANGER
Handling in an explosive atmosphere
It is forbidden to install, disassemble, repair or replace the valve in an exlosive atmosphere.
Risk of explosion.

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4. Product description
The hydraulic part of the valve consists of a steel housing (1) with a radial input port P from the pressure source and an output port T leading to the
tank. The axial output of port A usually leads to the appliance. Inside the housing a hardened spool moves, held in its basic position by a spring.
The spool regulates the output pressure in port A by comparing the output pressure acting on the face of the spool with the set force by the solenoid
control signal current. The solenoid coil (2) is fixed to the control system by a special nut (3).
Correct operation of the valve is dependent on correct connection to the hydraulic circuit.
4.1 Materials used
Spool - hardened steel
Valve housing - high strength steel
Control system extension and tube of control system - steel
Non-magnetic control ring and pin - Cr-Ni stainless steel (8 to 10% Ni)
Control system plug - brass
Compression spring - patented steel wire for the production of springs
Valve seal – NBR
Coil casing and lid, coil clamping nut - steel
Coil body – PA
Coil winding – enamelled Cu wire
Coil seal on control system – silicone
The materials used are not found in the lists of prohibited and mandatory documented substances
Directive 2015/863/EU (RoHS) and EU Regulation no. 1907/2006 (REACH).
3
21
4.2 Surface protection against corrosion
The valve surface is galvanized with 520 h corrosion protection in NSS according to ISO 9227. Surface layer without hexavalent chronium Cr+6.
4.3 Basic technical parameters PVRMX3-103/S-*
Parameter Unit Value
Valve type PVRMX3-103/S-30 PVRMX3-103/S-80
Valve connection thread M24x1.5 (QJ3)
Maximum pressure in P port bar (PSI) 50 (730) 90 (1300)
Maximum reducing pressure in A port bar (PSI) 30 (440) 80 (1160)
Maximum flow in direction P→A l/min (GPM) 40 (11)
Pressure losses as a function of flow rate bar graf ∆p = f (Q)
Fluid temperature range °C -30 … + 70
Response time at 100 % ms < 50
Working fluid kinematic viscosity range mm2s-1 10 až 400
Required minimum working fluid purity class 21/18/15 ISO 4406
Lifetime cycles 107
Weight of valve with solenoid kg (lbs) 1.5 (3.31)
Technical data of the solenoid with certification for explosive environments
Nominal supply voltage (UN) V 12 DC 24 DC
Supply voltage fluctuations ±10 % UN
Supply coil input power W 18
Limit current A 1.37 0.65
Rated resistance at 20°C Ω 7.7 32.3
Duty cycle S1 100 % ED
Optimal PWM frequency Hz 150
Enclosure type acc. to EN 60529 IP66 / IP68*
Ambient temperature range T4
Temperature class Nominal coil input power °C Ambient temperature range
T4 – 135 °C 18 W -30 … +60
*IP68 – test conditions: product submerged 1m under water for 1 hour.

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The valve is designed for common hydraulic working fluids:
› mineral oils of performance classes HM and HV according to ISO 6734-4
› non-flammable and difficult to ignite hydraulic fluids according to ISO 12922
› environmentally acceptable hydraulic fluids according to ISO 15380
NOTICE: NBR seal material is not suitable for some working fluid groups, such as the HFD group.
In case of uncertainty, we recommend to perform a test of the mutual tolerance of the seal material and the working fluid.
4.4 Working fluid
Characteristics measured at ν= 32 mm2/s (156 SUS)
4.5 Valve characteristics
0100
60
120
80
20
40
(290)
(580)
(870)
(1
160)
(1740)
200 300 400 500 800
(1450)
600 700
100
1
2
0200
60
120
80
20
40
(290)
(580)
(870)
(1
160)
(1740)
400 600 800 1000 1600
(1450)
1200 1400
100
1
2
Reduced pressure in A port as a function of excitation current at zero flow through the valve (Q = 0 l/min)
Current I [mA]
Pressure p [bar (PSI)]
Uc = 12 V, PWM = 150 Hz
Pressure p [bar (PSI)]
Current I [mA]
Uc = 24 V, PWM = 150 Hz
Pressure level Input pressure (P port)
1 80 bar (1160 PSI) 90 bar (1300 PSI)
2 30 bar (440 PSI) 50 bar (730 PSI)
4.6 Legislation and standards
ČSN EN ISO 4413 Hydraulics - General rules and safety requirements for hydraulic systems and their components
ČSN ISO 6403 Hydrostatic drives. Valves for flow and pressure control. Test methods
ČSN ISO 4411 Measurement of the characteristics Δp = function (Q) of hydraulic valves
ČSN EN ISO 9001 Quality management systems
ČSN EN ISO 12100 Machine safety / risk analysis
Directive 2006/42/EU on machinery / used chapters: 1.7.4 Instructions for use, Annex III CE marking
ČSN EN 82079-1 Preparation of instruction manuals - Structure, content and presentation / Part 1: General principles and detailed requirements
()30
04
10
12
2
14
16
4
6
8
()60
()90
()120
()150
()170
()200
()230
8121620242832 36
40
()2.1 ()4.2 ()8.5 ()6.3
()
10.6
A T
P A
Flow Q [l/min (GPM)]
Pressure drop Δp [bar (PSI)]
Pressure drop related to flow rate
A-T, Valve coil de-energized (relieving function)
P-A, Valve coil energized (reducing function)

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5. Product modification
Ordering key
An overview of possible valve modifications is described in the ordering key.
6. Target user group
All of the above activities related to this valve, in particular installation and connection to the hydraulic circuit, require specialist technical knowledge
and experience in the field of hydraulics. The minimum level of competence required is CETOP level 2. This level is generally defined as performing a
variety of activities that require an understanding of technical factors and contexts. This may lead to the need for correct interpretation (e.g.
tolerances, operating methods) or the application of various non-repetitive procedures. This may require the performance of checks, simple analysis
and diagnostics, and the ability to react to changes in an operational manner. Teamwork is often necessary.
The connection of solenoid coils to the supply voltage must only be carried out by persons with the appropriate electrical qualifications.
All operations must be carried out with responsibility for correctness and quality, as this is a dangerous area of product use.
It is forbidden for the following persons to carry out any activities related to this product:
› minors (the exception is practical training of pupils under the professional supervision of a teacher)
› without established professional competence
› under the influence of alcohol and/or drugs
› patients whose medical condition could affect safety (reduced attention and ability to react in time, excessive fatigue)
› under the influence of drugs that have a demonstrable effect on attention and timeliness
› allergic to hydraulic working fluids
7. Operating instructions broken down by product life stage
The valve is packaged in vacuum shrink-wrapped PE film and protected against moisture and dust as standard. The P, A, B, T channel ports on the
base are additionally protected by a plastic (PE) shipping plate. An identification label is affixed to the packaging.
The products should only be stored for the necessary time at a temperature of 0 to +30 °C in a dry place with a relative humidity of up to 65 %.
After extended periods of storage, we recommend checking the product for corrosion damage, replacing seal at the base of the body and flushing
the product with clean oil before connecting it to the hydraulic circuit.
7.1 Transportation and storage of the product
Check that the valve type on the identification plate is correct.
Cut the packaging with scissors and carefully remove the valve from the packaging.
Unpack the valve in a clean place and prevent contamination of the valve.
The packaging is made of PE and can be easily contaminated with residual hydraulic oil from the valve.
Dispose of the packaging in accordance with applicable environmental regulations. The mounting position of the valve is arbitrary. However, if
vibrations or shocks are applied to the valve during operation, they must not be applied in the direction of the spool axis.
7.2 Product installation
WARNING
Slippery valve surface
The valve contains a small amount of residual oil after a hydraulic function test carried out by the manufacturer.
If the surface of the unpacked valve is contaminated with oil, remove the oil using a cleaning cloth. A slippery
valve surface can cause the valve to fall during handling and cause minor injury or damage to the valve.
12
24
30
80
PVRMX3 - 103 / S - - B4 - B
Valve certification
ATEX, IECEx
IECEx for Australia and New Zealand
EAC for EAEU States*
No designation
A
E
*EAEU= Eurasian Economic Union, certificate according to TR TS 012/2011 valid
for the Russian Federation, Belarus, Armenia, Kazakhstan and Kyrgyzstan.
Direct-acting screw-in Proportional
pressure reducing valve, designed
for use in explosive environments
Model
screw-in cartridge
Max. reduced pressure
30 bar (440 PSI)
80 bar (1160 PSI)
Valve cavity
M24 x 1,5 / QJ3
Surface treatment
zinc-coated (ZnNi), ISO 9227 (520 h)
No designation
Seals
NBR
Supply voltage / limit current
12 V DC / 1,37 A
24 V DC / 0,65 A
Temperature class - solenoid nominal input power
ClassT4 - 18 W
No designation
3
8
Cable length
without cable
3 m
8 m

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7.2.1 Electrical connection of coils
Coils with AC power supply and rectifier are supplied with only the cable connected. Also, DC powered coils can be supplied by the manufacturer
with the cable attached upon request. If the directional control valve coils do not have a power cable connected, proceed as follows:
› A 6 to 8 mm outer diameter cable must be used to connect the coils to the power supply. If using a different type of grommet, follow the
grommet manufacturer‘s recommendations when selecting the cable diameter.
› Use a cable with sufficient insulation temperature class. For coil temperature class T4 this must be a cable with a minimum insulation
temperature resistance of +105 °C (+221 °F), for temperature classes T5 and T6 a cable with a temperature resistance of +90 °C (+194 °F).
Furthermore, the cable should be sufficiently protected against damage with respect to environmental conditions, e.g. resistant to
mechanical damage or to the effect of chemicals.
› Using an inbus wrench s=3, loosen the four M4x35 DIN 912 terminal cover screws. Carefully remove the cover. Do not damage the cover
seal (O-ring 45x2).
4x M4x35 DIN 912 screws
terminal lid
› Unscrew the grommet nut (5) of the cable grommet with the wrench a = 24, remove and check the grommet seal (2) for damage.
› Thread the cable through the removed grommet parts (2, 3, 5) and the grommet in the terminal lid (1).
› Remove the insulation from the end of the cable so that when the cable is fixed in the grommet, the insulated part of the cable extends sufficiently
into the inner space of the terminal block.
› Strip a 5 mm length of the ends of the power supply wires and equip the ground wire with an M3 - 0.75 mm2cable gland designed for ambient
temperatures of +.125 °C (+257 °F) and above.
› Secure the coil power wires with a maximum cross section of 2 mm2to the terminal block using a 3 mm screwdriver. Tighten the screws to 0.4 Nm
(0.30 lbf.ft).
› Thread the cable lug of the ground wire under the head of the ground screw, located next to the terminal block, and screw in and tighten the
ground screw M3 with an inbus wrench a= 2.5 mm to a torque of 1.2 + 0.2 Nm.
› Make sure that the wires are properly connected and not in danger of coming loose.
› Check the lid seal for damage and fit the lid onto the coil body. Tighten the lid using four M4x35 DIN 912 screws and torque to
4 + 0.5 Nm (3.0 + 0.4 lbf.ft) using an inbus wrench s = 3.
› Assemble the cable grommet as shown. Tighten the cable grommet nut (5) with the key a = 24 so that the cable is held firmly in the
grommet. The tightening torque of the nut depends on the cable diameter.
› After mounting the valve, it is necessary to ground the coil surface by connecting the ground wire to the terminal on the surface of the
terminal cover using an M5x10 screw. Tighten the screw using an 8 mm screwdriver..
ground screw
terminal

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› The user must protect the electrical circuit of the solenoid with a fuse with a tripping characteristic corresponding to the slow fuse wire
blowing. The fuse tripping current shall be IN≤ 3x IG, where IGis the current flowing through the solenoid coil at the maximum coil
temperature. (For IGvalues, see the coil electrical parameter table.) Conductors and elements shall be used for the fuse circuit that are
rated for a higher electric current than the maximum short-circuit current in the customer‘s equipment circuit. If elements of the electrical
installation, including the fuse, are also located in a potentially explosive atmosphere, these elements must also have the appropriate
degree of protection.
Electrical wiring diagram of coils
Coils with DC power supply and surge protection by bipolar diode
UZ= 36 V pro UN= 12 V DC a 24 V DC
12
Table of coil electrical parameters
Coil type with DC
electric power supply
Nominal supply
voltage
Winding resistance at
t = 20 °C
Nominal current Limit current Bipolar diode Nominal input
power
UN[V DC] R20 [Ω] IN[A] IG[A] UZ[V] PN[W]
EX18 046 18W 12V DC 12 7.7 1.560 1.37 36 18.8
EX18 046 18W 24V DC 24 32.3 0.740 0.65 36 17.8
7.2.2 Connecting the valve to the hydraulic circuit
The valve is designed to be screwed into the formed port in the block with connection thread M24x1.5.
The shape and dimensions of the port comply with the technical standard ISO 7789.
min. for side
channel
AREA FOR RADIAL
HOLE
AXIAL HOLE
DANGER
Correct electrical connection of coils
Make sure that the wires are properly attached to the terminal block and to the grounding screw.
Ensure that the terminal box cover and the cable in the grommet are properly fastened and sealed.
There is a risk of explosion.
DANGER
Coil surface grounding
If the surface of the coil and thus the entire valve is not grounded, an electrical discharge of static electricity
may occur.

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Note:
Associated tools for production of ports can be ordered from the valve manufacturer (SMT catalogue 0019)
Drawings of the ports are also available in the same catalogue.
Unscrew the coil nut (4) by turning it counterclockwise. Remove the coil seal ring (3) and coil (2) from the control system.
The valve (1) is mounted in the chamber without the spool to prevent the valve from tightening in the chamber. Before inserting the valve into the
chamber in the block, ensure that undamaged seals are fitted to the valve housing. Also verify that the valve and chamber surfaces are not damaged
or contaminated. Before installing the valve, we recommend lightly lubricating the housing seals with grease or working fluid. Using slight pressure,
carefully insert the valve into the chamber and turn it clockwise to screw it in by hand. Then tighten the valve to 15 + 2 Nm using a torque wrench (a
= 30).Place the spool (2), spool seal (3) and fixing nut (4) back on the valve control system. Orient the spool by turning it on the control system so
that the cable outlet points in the required direction and secure the position of the spool by tightening the nut clockwise with a torque wrench
(a = 36) to 5 + 1 Nm.
Dimensions of PVRMX3-103 Ex proof Proportional valve, dimensions in mm (in)
Grounding screw
M5x10
46 (1.81)
46 (1.81)
46,5 (1.83) 74 (2.91)
132 (5.20)
M24x1,5
20 (0.79)
18 (0.71)
(101 (3.98))
63 (2.48)
(88 (3.46))
(82 (3.23))
61 (2.40)
40 (1.57)
30
36 5+1 Nm
(3.7+0.7 lbf.ft)
3
4+0,5 Nm
(3.0+0.4 lbf.ft)
Terminal cover screws
4x M4x35 DIN 912
15+2 Nm
(11.1+1.5 lbf.ft)
4
3
2
1
30
15+2 Nm
(11.1+1.5 lbf.ft)
5+1 Nm
(3.7+0.7 lbf.ft)

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The solenoid windings heat up during operation. To ensure that the maximum winding temperature is not exceeded, effective external cooling must
be provided, both by not exceeding the maximum fluid and ambient temperature and by maintaining the minimum volume of the connecting block.
For one screw in-in valve, the minimum volume of the block into which it is screwed is 225 cm3. If more than one screw-in valve is fitted in one block
and can be connected at the same time, the distance between adjacent valves must be at least 55 mm (see figure).
85 (3.35)
55 (2.17) 60 (2.36)55 (2.17)
7.3 Commissioning
Before commissioning the hydraulic circuit , check for proper valve tightening in the block chamber and proper wiring of the electrical power and
ground cables. Test operation should be conducted without the presence of an explosive atmosphere. After the hydraulic circuit has been put into
operation, check the valve for leaks. Verify the function of the valve by adjusting the various reduced pressure values with a control signal and then
checking the pressure value with a manometer or pressure transducer built into the piping on the outlet side of the valve (port A). Unlike a mechani-
cal valve, an electrically operated valve produces virtually no pressure at the outlet when the solenoid is switched off, because the output port (A) is
relieved by the connection to the T-port.
7.4 Normal operation
During normal operation, the spool automatically maintains the output pressure at a constant set point. By changing the control signal, that is, by
changing the current through the solenoid coil, the set value of the output reduced pressure can be changed.
WARNING
Coil cooling
Coil cooling takes into account the cooling surface of the hydraulic part of the valve.
Do not power separately disassembled coils. Excessive winding heat, insulation damage and short circuiting
between coils may occur. For the same reason, the surface of the coils must not be covered, exposed to direct
heat sources or sunlight. The valve must not be closed in a tight space without ensuring air circulation.
DO NOT exceed the MAXIMUM PARAMETERS, shown in table 4.3.
OBSERVE THE OPERATIONAL RESTRICTIONS AND AVOID THE RISKS, referred to in paragraph 3.
USE PROTECTIVE EQUIPMENT
When working with hydraulic fluid, it is recommended to wear safety goggles, protective rubber gloves and sturdy shoes with non-slip soles.
7.5 Extraordinary and emergency situations
In the event of a power failure to the solenoids or a coil failure, the centering spring will return the valve spool to its base position and the valve
relieves port A by connecting it to port T. The pressure at the valve output drops to virtually zero. Based on the results of the risk analysis, the
following potential faults have been identified:
› External valve leakage due to seal damage associated with a working fluid leak.
› Loss of valve function, resulting in loss of control of the appliance.
› Mechanical damage to the electrical part of the valve, including the cable
WARNING
Correct installation of the valve
A missing or damaged ring after the thread will cause a leak of working fluid. Missing or damaged rings on the
valve body will cause internal volume loss and unreliable valve operation.

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Defective valves must be replaced/repaired.
ENVIRONMENTAL PROTECTION
Spilled working fluid must be removed immediately, e.g. with suitable absorbents, contaminated parts of the perimeter cleaned,
contaminated objects in the vicinity cleaned or disposed of.
Contaminated objects and residues of leaked working fluid must be disposed of in accordance with the applicable environmental
regulations.
FIRST AID
Electric shock
› Switch off the power supply immediately
› Make sure the casualty is breathing.
› Call emergency medical services
› If the casualty is not breathing, initiate measures to restore basic life functions according to first aid abilities (CPR, artificial
respiration) and equip the workplace (defibrillator) with life-saving equipment.
Contamination by hydraulic working fluid
If contamination of persons occurs, contaminated parts of clothing must be removed immediately and the skin thoroughly washed
with soap or treated with a suitable cream.
If the eyes are contaminated, flush them with clean water and seek medical attention. Seek medical attention also in case of
accidental ingestion of working fluid or skin allergic reaction to splashes of working fluid.
7.6 Repairs carried out by specialist
A defective valve that is not caused by a malfunctioning solenoid coil must be removed and replaced with a new one.
Repairs to a defective valve may only be carried out by the manufacturer.
When replacing the defective valve with a new one, proceed as follows:
› Ensure that no explosive atmosphere is present during the repair period. (see also 7.5).
› Switch off the pressure source (pump) of the hydraulic circuit (see also 7.5).
› Relieve the hydraulic circuit including the accumulators by connecting it to the tank (see also 7.5).
› Ensure that the hydraulic circuit is pressure-free (see also 7.5).
› Switch off the electrical supply to the valve solenoids (see also 7.5).
› Ensure that the surface of the valve and solenoid coils is cooled to a low enough temperature to prevent skin burns (see also 7.5)
› Clean the surface and around the valve.
› Remove the coil surface ground wire by loosening the M5x10 ground screw.
› Disconnect the electrical supply cable to the coils (see 7.6.3).
› Loosen the coil nut with a wrench (a = 36) and unscrew it.
› Remove the sealing ring and spool from the valve control system.
› Loosen the valve with a wrench (a = 30) and carefully unscrew it.
› Allow the remaining working fluid from the valve to drain into the smaller container provided.
› When installing the new replacement valve, follow the procedure in section 7.2 Product installation
Remove residual working fluid from the dismantled defective valve, seal the channel ports with a shipping plate and package it to prevent mechanical
damage and contamination of the area outside the package during transport. Send the packaged valve with a description of the manifestation of the
defect to the manufacturer.
A new valve is warranted by the manufacturer for 1 year. However, a claim may not be accepted by the manufacturer if the valve is mechanically
damaged, the seal material is damaged by aggressive liquid, or the valve has been shown to have been used improperly and not in accordance with
these instructions of use.
7.6.1 Replacing a faulty valve
A suitably qualified user is authorised to replace the complete valve, the seals at the base of the valve body, which are supplied as a spare set. They
can also replace a malfunctioning solenoid coil.
DANGER
Shutdown of electrical power, pressure source and circuit relief
In the event of an emergency, immediately shut off the electrical power supply to the control solenoids and
the pressure source (pump). Relieve all parts of the hydraulic circuit including the hydraulic accumulators by
connecting them to the tank. A malfunctioning valve may cause a dangerous operating situation due to loss
of control. A damaged electrical part can initiate an explosion.
DANGER
Prohibition of handling and repair in explosive atmospheres
A defective valve must not be repaired or dismantled when an explosive atmosphere is present.
There is a risk of initiating an explosion.
WARNING
Check pressure relief part of the circuit
Always ensure that the circuit is depressurised before intervening in the hydraulic circuit, for example before
removing a valve. Otherwise there is a risk of leakage of working fluid and contamination of persons.
WARNING
Surface temperature
Before starting disassembly, make sure that the surface of the valve and solenoid coils has cooled to a low
enough temperature to prevent skin burns.

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7.6.2 Replacing the sealing rings on the valve housing
A sealing ring in the recess behind the thread ensures the valve is sealed in the block and prevents working fluid from leaking out of the block.Sealing
rings on the steel valve housing separate the individual channels in the port from each other. If the ring is not fitted or is damaged, unwanted
interconnection of the channels and unreliable control function of the valve will occur. In this case, the valve must be removed from the port and the
sealing rings replaced with new ones.
› Ensure that no explosive atmosphere is present during the repair (see also 7.5).
› Switch off the pressure source (pump) of the hydraulic circuit (see also 7.5).
› Relieve the hydraulic circuit including the accumulators by connecting it to the tank (see also 7.5)
› Ensure that the hydraulic circuit is de-pressurized (see also 7.5).
› Switch off the electrical supply to the valve solenoids (see also 7.5).
› Ensure that the surface of the valve and solenoid coils is cooled to a low enough temperature to prevent skin burns (see also 7.5)
› Clean the surface and around valve.
› Loosen the coil nut with a wrench (a = 36) and unscrew it.
› Remove the sealing ring and spool from the valve control system.
› Loosen the valve with a wrench (a = 30) and carefully unscrew it.
› Allow the remaining working fluid from the valve to drain into the prepared smaller container. Dry the valve surface with a cleaning cloth.
› Using a suitable tool, e.g. a small screwdriver, remove any sealing rings. Work carefully, do not damage the valve housing and threads.
Check the valve for damage and cleanliness.
› Use a replacement seal kit. Thread the sealing rings into the recesses one by one in the correct place. Do not confuse the seals! Lubricate the new
seals with grease or working fluid.
› Check the chamber in the block for damage and cleanliness.
› When installing the new replacement valve into the block, follow section 7.2 Product installation.
› After reassembling the solenoid to the valve control system, check that the solenoid cable in the grommet and the ground wire are properly
secured to ensure that they have not come loose during manipulation of the solenoid.
› After the repair, check the tightness of the new sealing and the correct operation of the valve.
7.6.3 Replacing the coil
A defective control solenoid coil may only be replaced with the manufacturer‘s original replacement coil with identical parameters.
› Ensure that no explosive atmosphere is present during the repair (see also 7.5).
› Switch off the pressure source (pump) of the hydraulic circuit (see also 7.5).
› Relieve the hydraulic circuit including the accumulators by connecting it to the tank (see also 7.5).
› Make sure that the hydraulic circuit is de-pressurized (see also 7.5).
› Switch off the electrical supply to the valve solenoids (see also 7.5).
› Ensure that the surface of the valve and solenoid coils is cooled to a low enough temperature to prevent skin burns (see also 7.5).
› Clean the surface and surroundings of the valve.
› Disconnect the coil surface ground wire.
› Disconnect the coil cable from the power supply.
› Loosen the coil fastening nut by turning it anti-clockwise using the wrench a = 36. Remove the nut.
› Remove the sealing ring (1) 21.89x2.62, the coil and the second sealing ring 22x1.5 from the control system tube.
› Check the surface condition of the control system for damage, e.g. corrosion.
› Connect the power supply cable to the new coil according to point 7.2.1, unless a coil with an already connected cable has been supplied by the
manufacturer. We recommend using a new cable to connect the new coil.
› Replace the sealing rings with new ones. They are supplied in a set with the coil and a new fastening nut.
› Fit a new 22x1.5 sealing ring, a new coil with attached cable, a new 21.89 x 2.62 sealing ring and screw on a new clamping nut on the control
system tube. Tighten the nut with a wrench to a torque of 5 + 1 Nm.
› Connect the ground wire to the new coil.
› After completing the coil replacement, check the valve for proper operation.
Hydraulic block Control system
Coil
Mounting nut
Sealing ring (1)
21,89x2,62
Sealing ring (2)
22x1,5
7.7 Product maintenance
During normal operation, keep the valve clean and free of dust deposits on the surface. Deposits both impair cooling of the valve and coils and can
form flammable layers prone to ignition. Depending on the conditions of use, check the hydraulic circuit for leaks, the electrical parts including cables
for damage and the valve for correct function at appropriate intervals. The check should be performed every time the device is started, but at least
once a week during long-term operation.

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7.8 Spare parts supplied
Ordered as spare sparts, see catalog SP 8010.
Item Description of spare part Designation Order number
1 Valve coil See coil overview See coil overview*
2 Sealing ring OS - coil O-ring 22x1.5 VMQ 50 (silicon) in set with coil
3 Seal under the nut O-ring 21.89x2.62 VMQ 70 (silicon) in set with coil
4 Coil mounting nut in set with coil
5 Terminal box lid seal O-ring 46x2 VMQ (silicon) 34950700
*All coils are supplied complete with mounting nut (4) and sealing rings (2 and 3).
1
2
35
4
1
EX22 - 46 / - - B
01200
02400
Solenoid coil for
explosive atmospheres
internal diameter 22 mm
DC power supply
(Standard delivery without cable
with terminal block with cable grommet) 12 V DC
24 V DC
Casing surface protection
520 h in NSS according to ISO 9227
Cable length
without cable
cabel 3 m
cabel 8 m
without designation
3M
8M
Nominal coil input power
18 W
18W
Coils for explosive environments - order key ARGO-HYTOS
Valve hydraulic part seal kit
Valve type PVRMX3-103 Set order number 20776700
Item sets Description of individual parts in the set Amount
1 O-ring 20.3x2.4 NBR 1
2 O-ring 17x1.8 NBR 1
3 O-ring15x1.8 NBR 1
The storage conditions for seals are specified in ISO 2230 - Rubber products - Storage guidelines:
Seals to be stored:
› in covered, dry and tempered areas at temperatures of +15 to +25 °C, away from direct heat sources
› protected from the weather, direct sunlight and ultraviolet radiation
› undeformed, on a clean flat base in the original packaging
› out of reach of petroleum and chemical substances
Rubber group Chemical name abbreviation according to ISO Chemical composition Length of storage
A Polyurethane AU Polyester urethane rubber 5 years
B NBR Butadiene acrylonitrile rubber 7 years
C FKM / FPM (Viton) Fluoroelastomer 10 years
C VMQ Vinyl-methyl - silicone rubber 10 years
1
23
5
4
Overview and designation of coils, order numbers
Coils with DC power supply, cable grommet, without cable
Marking on the coil PN[W] UN[V DC] Designation ARGO-HYTOS Order number
EX18 046 18W 12V DC 18 12 EX22-46/01200-18W-B 42139900
EX18 046 18W 24V DC 18 24 EX22-46/02400-18W-B 42140000
Casing dimensions

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Remove the valve from the hydraulic circuit (see chapter 7.6.1 Emergency and emergency situations). Remove as much residual
working fluid from the valve as possible.Dispose of the valve in an environmentally friendly manner in accordance with the
applicable regulations. The valve is mainly made of recyclable materials such as low carbon steel, copper wire, etc.
(see chapter 4.1 Materials used).
7.9 Product disposal
8. Manufacturer contact
ARGO-HYTOS s.r.o.
Dělnická 1306 • CZ - 543 01 VRCHLABÍ • Czech Republic
Tel. [phone] • E-mail: [email protected]

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ARGO-HYTOS s.r.o.
Dělnická 1306, CZ 543 01 VRCHLABÍ
[email protected] + 420 499 403 111
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ELEKTROMAGNETICKY OVLÁDANÝ VESTAVNÝ PROPORCIONÁLNÍ
TLAKOVÝ REDUKČNÍ VENTIL, PŘÍMO ŘÍZENÝ, URČENÝ PRO PROVOZ
V PROSTŘEDÍ S NEBEZPEČÍM VÝBUCHU
PVRMX3-103
NÁVOD K POUŽÍTÍ VÝROBKU
TP
ACZ