Argo-Hytos SD2PX-B4 User manual

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ARGO-HYTOS s.r.o.
Dělnická 1306, CZ 543 01 VRCHLABÍ
[email protected] + 420 499 403 111
SOLENOID OPERATED SCREW-IN PROPORTIONAL
DIRECTIONAL CONTROL VALVE,
DESIGNED FOR USE IN EXPLOSIVE ATMOSPHERES
SD2PX-B4
Operating instructions
The following is the authorised translation of original operating instruction SD2PX-B4 no. 15186_1cz_04/2022,
issued by the manufacturer:
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
EN

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Contents of operating instructions
Chapter Strana
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 8
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 9
4. Product description 9
4.1 Emergency manual control 9
4.2 Materials used 9
4.3 Surface protection against corrosion 10
4.4 Basic technical parameters 10
4.5 Working fluid 10
4.6 Valve characteristics 10
4.7 Legislation and standards 12
5. Product modifications 12
6. Target group of users 12
7. Operating instructons broken down into product life stages 12
7.1 Transportation and storage of the product 12
7.2 Installation of the product 12
7.2.1 Electrical connection of coils 13
7.2.2 Connecting the valve to the hydraulic circuit 14
7.3 Commissioning 16
7.4 Normal operation 16
7.5 Extraordinary and emergency situations 16
7.6 Repairs carried out by specialist 17
7.6.1 Replacing a faulty valve 17
7.6.2 Replacing the sealing rings at the base of the valve body 18
7.6.3 Replacing the coil 18
7.7 Product maintenance 18
7.8 Spare parts supplied 19
7.9 Product disposal 20
8. Manufacturer contact 20
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.
Mandatory traceability
Related documents:
Product catalogue: Screw-in spool type proporcional directional control valve SD2PX-B4 (no. 5186)
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 number 8010)
Product catalogue: Tools for machining chambers for screw-in valves (SMT no 0019)

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An overview of signal words and warning signs used in the text
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.
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 Polyethyne
PU Polyuretane
Glossary of technical terms used
›A hydraulic mechanism is one in which energy is transmitted via the compressive energy of the working fluid.
›A hydraulic directional control valve is a valve designed to control the direction of movement or stop the output component of an appliance.
›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 ports 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.
›The proportional hydraulic valve regulates the hydraulic parameter in the circuit continuously within a given range depending on the
magnitude of the electrical input control signal.
›The screw-in valve is designed to be screwed into the 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 SD2PX-B4 hydraulic valve is a directly controlled proportional spool valve, operated by a solenoid. The valve is designed to be screwed into a
B4 (C-10-4) formed chamber in a block with a 7/8-14 UNF connection thread. The shape and dimensions of the built-in chamber conform to the
technical specification ISO/TR 17209.
The screw-in proportional directional control valve with special port opening timing combines two functions. The basic function is the control of
the volume flow rate in the appliance branch and thus the speed of movement of the appliance output component (piston feed in the cylinder,
rotary hydraulic motor shaft speed). The second function is to open the check valve at the start of the movement. The check valve secures the
position of the load suspended on the appliance when the power supply is switched off. The valve can be used for a single-acting cylinder, where
the reciprocating piston secures the load, or for a rotary hydraulic motor, where one direction of rotation secures the load (e.g., winch drive). For a
double-acting cylinder or rotary hydraulic motor with drive in both directions of shaft rotation, two valves must be used (for appliance branches A,
B). The use of two independent valves in the A, B branches allows efficient control of the appliance. In conjunction with the pressure sensors, the
movement of the appliance can be safely controlled without the use of brake trigger valves even under negative load.
A B C
Piston movement is
blocked
by closing
the check valve.
The check valve is
open, the piston
moves downwards
due to the load.
The check valve is
open, the piston
moves upwards at a
continuously adjustab-
le speed.
F
F
▼F
F
▼
F
F
▼
Example of a valve connection in a hydraulic circuit

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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 propane), 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 - NE
Categorie M2
(the device remains
switched off)
Zone 1
Zone 2
IIA (propane) Zone 21
Zone 22
IIIA (combustible particles)
IIB (ethylene) IIIB (non-conductive dust
IIC (hydrogen) IIIC (conductive dust)
Area of application
Temerature classes
The valves are only supplied with a coil with a nominal supply of 18 W due to the function.
The surface temperature of the coil meets the conditions of class T4 with a maximum temperature of 135 °C.
The use of the valve in a given temperature class is conditional on not exceeding the maximum supply voltage of the coil, not
exceeding the temperature of the working fluid and the ambient temperature. (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).
U prachu je navíc použit pevný závěr „t“ (EN 60079-31, IEC 60079-31).
2. Valve protection against initiation of explosion of explosive atmosphere
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). AC-powered coils have complete
„m“ protection, where in addition to the coil, the terminal block and rectifier are protected by potting. Therefore, these coils are supplied with only
the cable connected. For explosive atmospheres consisting of dust, a fixed „t“ closure is also used (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
Area of application:
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
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 surface of the valve, which is contact-conductively connected to the main stage, is earthed by a grounding screw and protected against static
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 produce sparks during mechanical impacts.

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2.4 Applicable legislation and standards
3. Risks and limitations of product use
3.1 Risks associated with operating in explosive atmospheres
DANGER
Maximum operating pressure
The valve may be used for a maximum working fluid pressure of 250 bar in the P, A, B ports and 100 bar in the
T port. If the maximum pressure is exceeded, the valve may be damaged and the valve may burst if the pressure
value is exceeded. The T-port should be relieved for proper valve operation.
DANGER
Maximum hydraulic output
In section 4.6 of the product catalogue for the operating limits for each spool type. The hydraulic capacity is
given by the product of the working pressure and the volumetric flow rate. If the instantaneous power exceeds
the curve limit, the valve may lose function. The spool is subject to excessive hydrodynamic forces the valve will
not stop and as a result, control of the appliance will be lost.
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 35 + 5 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.
3.2 Risk associated with the hydraulic part of the valve
FTZÚ 22 ATEX 0032X, IECEx FTZÚ 22.0004X
Non-electrical parts
of 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
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“
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
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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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. There is a risk of electric shock.
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
4. Product description
The hydraulic part of the valve consists of a steel housing (1) with radial port outputs (A,B,C) and axial output (T).
A hardened slide spool moves inside the housing and is held in its basic position by a return spring. The spool is adjusted to the extreme position by
means of an explosion-proof certified solenoid (2). The solenoid coil is fixed to the control system by a special nut (3).
T
AP B
3
21
Without designation - standard
74 (2.91)
4.1 Emergency manual control dimensions in mm(in)
CAUTION
Use of the emergency manual control is forbidden when the valve solenoids are operational.
If the valve is operated by solenoids do not use the emergency manual control of the valve spool.
Valve damage and loss of function may result.
4.2 Materials used:
Valve housing - steel
Spool - hardened steel
Compression spring - patented steel wire for the production of springs
Valve seal – NBR
Control system extension and tube, spool cover and cap, spool mounting nut, sensor body - low carbon steel
Control system non-magnetic ring – Cr-Ni stainless steel
Control system plug – brass
Coil body – PA
Coil winding – enamelled Cu wire
Coil seal on control system – silicone
The materials used are not included in the lists of prohibited and mandatory documented substances of Directive 2015/863/EU (RoHS) and EU
Regulation No. 1907/2006 (REACH).
The emergency manual spool position control, built into the rear of the solenoid control system, is
used to reposition the spool in the event of loss of solenoid function or loss of electrical supply to the
solenoid coils to achieve the safe position of the actuated mechanism.
The use of emergency manual control is limited by the maximum T-port pressure of 25 bar.
CAUTION
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.

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4.4 Basic technical parameters
Parameter Unit Value
Valve connection thread 7/8-14 UNF / B4 (C-10-4)
Maximum operating pressure at ports P, A, B bar (PSI) 250 (3626)
Maximum pressure in the T-port (the T-port should be relieved for proper operation) bar (PSI) 100 (1450)
Maximum volume flow through the valve at ∆p = 10 bar l/min (GPM) 5 (1.32) 25 (6.60)
Pressure drop bar (PSI) graf ∆p = f (Q)
Fluid temperature range °C -30 … + 70
Signal response 100% ms < 50
Working fluid kinematic viscosity range mm2s-1 10 to 400
Minimum required working fluid purity class 19/15/13 ISO 4406
Lifetime cycles 107
Weight of valve with solenoid kg (lbs) 2.52 (5.56)
Technical data of the solenoid with certification for explosive environments
Nominal supply voltage (UN) V DC 12 24
Supply voltage fluctuations ±10 % UN
Limit current through coil A 1.37 0.65
Coil winding resistance at 20 °C Ω 7.7 32.3
Supply coil input power W 18
Duty cycle S1 100 % ED
Optimal frequency PWM Hz 200
Electrical protection IP according to EN 60529 IP66 / IP68*
Ambient temperature range for surface temperature class 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.
4.3 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.
› 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.
4.5 Working fluid
Characteristics measured at ν= 32 mm2/s (156 SUS)
4.6 Valve characteristics
(2.6)
(4)
(1.3)
(5.3)
(6.6)
10
15
5
20
25
40
(13.2)
35
30
A-T
020 40 60 80
100
45
50
(11.9)
(10.6)
(9.3)
(7.9)
B-TP-A
P-B
Δp 50 bar (730 PSI)
A→T: Δp 100 bar (1450 PSI)
Control signal current Ic [%]
Flow Q [l/min (GPM)]
Control signal current Ic [%]
Flow Q [l/min (GPM)]
Operating limits SD2P-B4/H3Y13-5 Function diagram SD2P-B4/H3Y13-25
(2.6)
(4)
(1.3)
(5.3)
(6.6)
10
15
5
20
25
40
(13.2)
35
30
A-T
020 40 60 80
100
45
50
(11.9)
(10.6)
(9.3)
(7.9)
B-T
P-A
P-B
Δp 50 bar (730 PSI)
A→T: Δp 100 bar (1450 PSI)

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50 100 150 200 250
P-A
(2.6)
(1.3)
(4.0)
15
5
20
25
0
(6.6)
(5.3)
(730) (1450) (2180) (2900) (3630)
10
50 100 150 200 250
P-A
(2.6)
(5.3)
(7.9)
10
20
40
30
0
50
(15.9)
(13.2)
(10.6)
(730) (1450) (2180) (2900) (3630)
60
Operating limits SD2P-B4/H3Y13-5 Operating limits SD2P-B4/H3Y13-25
Pressure p [bar (PSI)]
Flow Q [l/min (GPM)]
Pressure p [bar (PSI)]
Flow Q [l/min (GPM)]
5 10 15 20 25 30 35 40 45 50
P-A
(725)
(1450)
50
100
0
200
(2900)
(2180)
(2.6) (5.3) (7.9) (10.6) (13.2)
150
P-B
5 10 15 20 25 30 35 40 45 50
P-A
(145)
(290)
10
20
0
50
(725)
(580)
(435)
(2.6) (5.3) (7.9) (10.6) (13.2)
40
30
P-B
Pressure drop SD2P-B4/H3Y13-5 Pressure drop SD2P-B4/H3Y13-25
Pressure pin - pt[bar (PSI)] Pressure pin - pt[bar (PSI)]
Flow Q [l/min (GPM)] Flow Q [l/min (GPM)]
(1.3)
(2.6)
5
10
0
15
(5.3)
(4.0)
30 40 50 60 70 80 90 100
20
Operating limitsSD2P-B4/H3Y13-5 Operating limits SD2P-B4/H3Y13-25
Control signal [%]
Flow Q [l/min (GPM)]
1Δp 10 bar (145 PSI) 5 pin 150 bar (2180 PSI)
2 pin 20 bar (290 PSI) 6 pin 250 bar (3630 PSI)
3 pin 50 bar (725 PSI) 7 pin 200 bar (2900 PSI)
4 pin 100 bar (1450 PSI)
1 pin 250 bar (3630 PSI) 5 pin 150 bar (2180 PSI)
2 pin 200 bar (2900 PSI) 6 pin 100 bar (1450 PSI)
3 pin 20 bar (290 PSI) 7 pin 50 bar (725 PSI)
4Δp 10 bar (145 PSI)
Flow P - A
(5.3)
10
20
0
50
(13.2)
(10.6) 40
30
30 40 50 60 70 80 90 100
(7.9)
(2.6)
Control signal [%]
Flow Q [l/min (GPM)]
Flow P - A
1
2
3
4
5, 6
7
(4.2)
8
16
0
40
(8.5)
(6.3)
32
24
48
(10.6)
(12.7)
10 20 30 40 50 60 70 80 90 100
(2.1) 1
6
2
3
4
5
(1.1)
(2.1)
4
8
0
20
(4.2)
(3.2)
16
12
10 20 30 40 50 60 70 80 90 100
24
(5.3)
(6.3)
1
6
2
3
4
5
Operating limits SD2P-B4/H3Y13-25Operating limitsSD2P-B4/H3Y13-5
Control signal [%] Control signal [%]
Flow Q [l/min (GPM)] Flow Q [l/min (GPM)]
Průtok A - T Flow A - T
1 pin 20 bar (290 PSI) 4 pin 150 bar (2180 PSI)
2 pin 50 bar (725 PSI) 5 pin 200 bar (2900 PSI)
3 pin 100 bar (1450 PSI) 6 pin 250 bar (3630 PSI)
1 pin 20 bar (290 PSI) 4 pin 150 bar (2180 PSI)
2 pin 50 bar (725 PSI) 5 pin 200 bar (2900 PSI)
3 pin 100 bar (1450 PSI) 6 pin 250 bar (3630 PSI)

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5. Product modification
An overview of possible valve modifications is described in the ordering code.
The user cannot subsequently change the valve type.
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. 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
4.7 Legislation and standards:
ČSN EN ISO 4413 Hydraulics - General rules and safety requirements for hydraulic systems and their components
Other regulations and standards used:
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
Ordering code
B4
3Y13
5
25
12
24
SD2PX - B4 / H - - - B Certifications of valve
ATEX, IECEx
IECEx for Australia and New Zealand
EAC for EAEU* States
No designation
A
E
Explosion proof
4/3 proportional directional control
valve, Screw-in Cartridge design
Nominal flow rate P →A při Δp = 10 bar (1450 PSI)
5 l/min (1.3 GPM)
25 l/min (6.6 GPM)
Valve cavity
7/8-14 UNF-2A (C-10-4)
Model
High performance
Spool symbol
Temperature class - solenoid nominal input power
Class T4 - 18 W
No designation
3
8
Cable length
without cable
3 m
8 m
Surface treatment
zinc-coated (ZnNi), ISO 9227 (520 h)
Nominal supply voltage / limit current
12 V DC / 1.37 A
24 V DC / 0.65 A
Seals
NBR
Manual override
standard
No designation
No designation
*EAEU = Eurasian Economic Union, certificate according to TR TS 012/2011
valid for the Russian Federation, Belarus, Armenia, Kazakhstan and Kyrgyzstan.
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 Instalation of the product

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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 screw M4x35 DIN 912
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.
ground screw
terminal
› Screw M3 with an inbus wrench a= 2.5 mm to a torque of 1.2 + 0.2 Nm.
› 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.
CAUTION
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.

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Coils with DC power supply and surge
Coils with DC power supply and surge protection by bipolar diode
UZ= 36 V pro UN= 12 V DC and 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 a formed chamber in a block with a 7/8-14 UNF connection thread.
The chamber shapes and dimensions conform to the technical specification ISO/TR 17209.
Cavity B4
min. for side
channel
space for the
radial bore
AXIAl BORE
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.
› Elektrický obvod elektromagnetu musí uživatel chránit pojistkou s vypínací charakteristikou, odpovídající pomalému přepálení tavného vodiče.
Pro vypínací proud pojistky musí platit: IN≤ 3x IG, kde IGje proud protékající cívkou elektromagnetu při maximální teplotě cívky.
(Hodnoty IGviz tabulka elektrických parametrů cívek.) Pro okruh pojistky musí být použity vodiče a prvky, které jsou dimenzovány pro vyšší el.
proud, než je maximální zkratový proud v obvodu zařízení zákazníka.
› Pokud jsou prvky elektroinstalace, včetně pojistky, umístěny rovněž v prostředí s nebezpečím výbuchu, musí také tyto prvky mít odpovídající stupeň
ochrany.

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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 35 + 5 Nm using a torque wrench
(a = 27). 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 SD2PX-B4 valve, dimensions in mm (in)
4
3
2
27
1
Ground screw
M5x10
5+1 Nm
(3.7+0.7 lbf.ft)
34+0,5 Nm
(3.0+0.4 lbf.ft)
Terminal box lid screws.
4x M4x35 DIN 912
cable diameter
35+5 Nm
(25.8+3.7 lbf.ft)
36
46 (1.81)
40 (1.57)
82 (3.23)
144,5 (5.69)
16 (0.63)58 (2.28)
46 (1.81)
36 (1.42)
63 (2.48)
101 (3.98)
6÷8 (0.24 .31)÷0
84 (3.31)
27
7/8-14 UNF-2A

17,42(0.69)
60,45(2.38)
15,82(0.62)

19 (0.75)


1
23 4

35+5 Nm
(25.8+3.7 lbf.ft)
5+1 Nm
(3.7+0.7 lbf.ft)

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CAUTION
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.
The solenoid windings heat up during operation. Effective external cooling must be provided to ensure that the maximum winding temperature is not
exceeded, by not exceeding the maximum fluid and ambient temperature and by maintaining minimum volume of the connection block. A valve
body volume of (225 cm3) is sufficient for one manifold. If several valves that can be switched simultaneously are connected on the connection plate,
a distance of at least 55 mm must be maintained between the bodies of adjacent valves (see fig.).
85 (3.35)
55 (2.17) 60 (2.36)55 (2.17)
7.3 Commissioning
Before commissioning the hydraulic ciruit, check that the valve is correctly mounted on the connection plate and that electrical supply cables are
correctly connected. The valve is not to be adjusted. Test operation should be conducted without the pressence of an explosive atmosphere. After the
hydraulic circuit has been commissioned, check the valve for leaks. Simply verify the directional control valve function, repositioning the spool by
alternately switching the solenoids and monitoring the movement of the appliance or the amount of pressure in the appliance branches.
7.4 Normal operation
During normal operation , the directional control valve spool is adjusted by the solenoids. Normal operation of the system does not require any
manipulation of the valve.
CAUTION
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 4.4.
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.
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

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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
CAUTION
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.
CAUTION
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.
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 directional control 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 area 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 = 27) 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 valveand 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 defective valve
A suitably qualified user is authorised to replace the seals on the valve body base, which are supplied as a kit. They can also replace a malfunctioning
solenoid coil. For valves with a spool position sensor, the user can replace the defective sensor.

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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 (viz také 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 = 27) 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, verify that the new seals are tight and the valve is functioning properly.
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.
› Switch off the pressure source (pump) of the hydraulic circuit (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.
› Těsnicí kroužky cívky nahraďte novými. Jsou dodávány v sadě s cívkou a novou upínací maticí.
› 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.
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
Coils with DC power supply, cable grommet, without cable
Designation 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
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)
Casing
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
no designation
3M
8M
Nominal coil input power
18 W
18W
Coils for explosive atmospheres - ordering code ARGO-HYTOS
Valve hydraulic part seal kit
Valve type SD2EX-B4 Set order number 18960800
Position Description of individual parts in the set Amount
1 O-ring 19,4 x 2.1 NBR 1
2 Dualseal 16.65 x 19.05 x 3.1 PU 1
3 Dualseal 15.07 x 17.47 x 3.1 PU 1
4 Dualseal 13.47 x 15.87 x 3.1 PU 1
Overview and designation of coils, order numbers
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 Polyuretan 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

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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 4.2 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]