Argo-Hytos SD2EX-B2, Руководство по эксплуатации, Страница: 6 / 44

Subject to change_SD2EX-B2(B3;B4)_14064_1en_05/2022
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The SD2EX-B hydraulic valve
is a directly controlled solenoid operated spoolvalve. The valve is designed to be screwed into a formed chamber in a
block with a 7/8-14 UNF connection thread. The shape and dimensions of the built-in chamber conform to ISO/TR 17209.
The product is generally intended for damming and controlling the direction of working fluid flow in hydraulic circuits by connecting individual
channels by means of a spool moving in the valve body.
1. Use of product
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 Polyetylene
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.
› 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 m 3 s -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 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)
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.
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)
Valve type
Chamber designation
The most common uses of the valve
ARGO-HYTOS EATON
SD2E-B2 B2 C-10-2 Damping of fluid flow.
SD2E-B3 B3 C-10-3
Switching the fluid flow to the two branches of the circuit.
Control of a single-acting appliance where the reciprocating motion is provided by the load.
SD2E-B4 B4 C-10-4 Controlling the direction of movement of the output component of a double-acting appliance.