Valve Protection Against Intitiation Of Explosion In Explosive Atmosphere; Protection Of Electrical Parts; Cable Grommet; Protection Of Non-Electrical Parts - Argo-Hytos SD3EX-B2 Gebrauchsanweisung

Area of application
CLASS I – MINES CLASS II (IIG) - GAS
Category M1 – NO Zone 0 -
Categorie M2
Zone1
(the device remains
Zone 2
switched off)
The valves are offered in three surface temperature classes:
T4 with maximum surface temperature of 135 °C
T5 with maximum surface temperature of 100 °C
T6 with maximum surface temperature of 85 °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.
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 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).
In addition, a fixed „t" closure is used for dust (EN 60079-31, IEC 60079-31).
Areas of use
EPS14ATEX1744 X
l M2 Ex mb I Mb
AC lI 2G Ex mb IIC T4, T5, T6 Gb
lI 2D Ex mb IIIC T135°C, T100°C, T85°C Db
l M2 Ex eb mb I Mb
DC lI 2G Ex eb mb IIC T4, T5, T6 Gb
lI 2D Ex tb IIIC T135°C, T100°C, T85°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 parts

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.
› The sliding rod of the M7 manual emergency control is protected by a sealing sleeve against the ingress of contaminating particles, especially hard
particles, which could create an initiating spark.
FTZÚ 22 ATEX 0032X, IECEx FTZÚ 22.0004X
Non-electrical parts
of valve
www.argo-hytos.com
Instructions_SD3EX-C2*S5(S6)_14091_1en_01/2023
NO
IIA (methane)
IIB (acetylene)
IIC (hydrogen)
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
CLASS III (IID) - DUST
Zone 20 - NE
Zone 21
Zone 22
(see Table 4.4 Basic technical parameters).
IECEx EPS14.0064 X
Ex mb I Mb
Ex mb IIC T4, T5, T6 Gb
Ex mb IIIC T135°C, T100°C, T85°C Db
Ex eb mb I Mb
Ex eb mb IIC T4, T5, T6 Gb
Ex tb IIIC T135°C, T100°C, T85°C Db
IIIA (combustible particles)
IIIB (non-conductive dust)
IIIC (conductive dust)
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