Festo JMFH...D...C-EX Series, Operating Conditions

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Translation of the original instructions
1 Identification EX
Identification
II 2G Ex h IIC T4 Gb
II 2D Ex h IIIC T105°C Db
–5°C
£
T
a
£
+40°C
Tab. 1
2 Further applicable documents
NOTICE!
Technical data for the product can have different values in other documents. For
operation in an explosive atmosphere, the technical data in this document always
have priority.
All available documents for the product è www.festo.com/pk.
3 Safety
3.1 Intended use
The solenoid valve is intended for controlling pneumatic actuators.
3.2 General safety instructions
– The device can be used under the stated operating conditions in zones 1 and
2, explosive gas atmospheres, and in zones 21 and 22, explosive dust atmo­
spheres.
– Carry out all work outside potentially explosive areas.
– Observe the operating instructions for the solenoid coil.
– Installation and commissioning should only be conducted by qualified per­
sonnel.
– Only use media in accordance with the specifications.
4 Function
By means of external electric switching, the valve pressurises the downstream
compressed air flows alternately or simultaneously. The bi­stable valve is
rerouted through reciprocal switching on of the voltage to the solenoid coils and
maintains the switching position up to the counter­signal even after the signal is
removed.
5 Application
The explosion protection category of the entire system is dependent on the cat­
egory of the combination of the solenoid valve and the solenoid coil.
6 Commissioning
WARNING!
The discharge of electrostatically charged parts can lead to ignitable sparks.
•
Prevent electrostatic discharge through the use of appropriate installation
and cleaning measures.
• Include the device in the system’s potential equalisation.
NOTICE!
Related type of ignition protection: c (constructional safety)
NOTICE!
Strong charge­generating processes can charge non­conductive layers and coat­
ings on metal surfaces.
NOTICE!
Particulate matter in the compressed air can cause electrostatic charges.
NOTICE!
Escaping exhaust air can swirl up dust and create an explosive dust atmosphere.
– For battery/block mounting, mount the valves to the manifold rails or mani­
fold blocks intended for it.
The solenoid coil is mounted on the electrically actuated valves using the sup­
plied spring washer and knurled nut.
–
Push the solenoid coil and spring washer over the armature guide tube, tight­
en the knurled nut. Tightening torque: 1 … 1.5 Nm
WARNING!
Impact movements involving rust and light metals and their alloys can result in
the formation of sparks.
•
No not use any tools with corroded surfaces.
• Protect the product from falling objects.
– Limit the number and dimensions of disassembled connections to a minimum
and use short tubing.
– Ensure that no mechanical stresses can occur.
– Seal unused openings with blanking plugs or slot covers.
– Ensure that surfaces to be cleaned can be easily accessed.
7 Operation
– Draw in operating medium outside potentially explosive areas.
– Do not operate the device with separate pilot air. Do not turn coding.
– Do not use LR intermediate pressure regulator plates in potentially explosive
areas. The vented air can stir up dust.
8 Malfunctions
Malfunction Remedy
Audible leakage at the connections Check fittings of the connections.
Incomplete ventilation of an output Ensure constant pressure in the system.
Switching failures
Considerably slower switching times
Check switching function of the valve for fluctu­
ations in current, signal errors or delays.
Protect against penetration of foreign matter.
Replace device.
Tab. 2
9 Service and care
– Only clean the device with a damp cloth.
– Service device after 5 million cycles or not later than after 6 months.
The replacement of wearing and spare parts is possible in individual cases.
Repairs of this type must only be carried out by trained and authorised special­
ists.
–
Please contact your Festo technical consultant.
10 Technical data
Operating conditions
Operating medium Compressed air to ISO 8573­1:2010:[5:­:­]
Max. operating pressure [bar] 10
Max. pilot pressure [bar] 10
Mounting position Any
Temperature ranges
Ambient temperature
(with solenoid coil) [°C]
-
5 … 40
Temperature of medium [°C] -
5 … 40
Tightening torque
Fitting [Nm] 1.5 … 2
Valve fastening [Nm] 3.5 … 4
8086852
(J)MFH...D...C-EX
Solenoid valve ISO
8086852
2018­05b
[8086854]
Operating conditions | EX
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347­0
www.festo.com