Special Conditions For Safe Use - Madas M16/RM N.C. EEX Manual Del Usario

3.2 - INSTALLATION (see example in 3.4)
• Assemble the device by flanging it, with the due seals, onto the plant with pipes whose flanges match up with the connection being
attached. The gaskets must be free from defects and must be centred between the flanges;
• If, after installing the gaskets, there is still an excessive space in between, do not try to reduce said gap by excessively tightening
the bolts of the device;
• The arrow, shown on the body (5) of the device, needs to be pointing towards the utility;
• Insert the relative washers inside the bolts in order to prevent damage to the flanges during tightening;
• When tightening, be careful not to "pinch" or damage the gasket;
• Tighten the nuts or bolts gradually, in a "cross" order (as shown in the lateral figure);
• Tighten them, first by 30%, then by 60%, and finally 100% of the maximum torque
(see the table below according to EN 13611);
Diameter
Max. torque (N.m)
• Tighten each nut and bolt again clockwise at least once, until the maximum torque has been achieved
uniformly;
• The device can also be installed vertically without prejudicing the correct operation. It cannot be put in
upside down (with the cover (2) pointing downwards);
• During installation, avoid debris or metal residues from getting into the device;
• To guarantee mechanical tension-free assembly, we recommend using compensating joints, which also
adjust to the pipe's thermal dilation;
• If the device is to be installed in a ramp, it is the installer's responsibility to provide suitable supports or correctly sized
supports, to properly hold and secure the assembly. Never, for any reason whatsoever, leave the weight of the ramp only on
the connections (flanged or threaded) of the individual devices;
• In any case, following installation, check the tightness of the plant;
• ATTENTION: The coil is provided with a 3m long co-pressed power supply cable. This cable MUST NOT be replaced with a
different one. In the event of damage, the part (coil) must be disposed of and replaced with an identical new one;
• In the dangerous area, wire the cable terminals with approved explosion resistant equipment (E.g. Terminal box with "E"
protection or increased safety according to EN 60079-7);
• Make sure the connection cables are inserted correctly into the electrical terminal, ensuring they are not crushed and/or
damaged in order to prevent short circuits and interferences.
• The valve needs to be connected to earth either through the pipe or through other means (e.g. cable jumpers).

Special conditions for safe use

A fuse calibrated to rated current (max. 3 x Inom. according to IEC 60127-2-1) or a motor protection switch calibrated to rated
current and with automatic thermal cut-out must be connected in series to every solenoid valve as protection against short
circuits. With very low solenoid valve rated currents, it is sufficient to install a fuse with lower current values, according to the IEC
standard above. The fuse can be integrated into the associated power supply unit or must be housed separately. The rated voltage
of the fuse must be equal to or above the established rated voltage of the magnetic coil. The fuse-connection breaking capacity
must be equal to or higher than the maximum possible short circuit current in the installation site (usually 1500 A).
A maximum ripple of 20% is valid for all direct current magnets.
For further technical information and method of installation/wiring, refer to the coil's technical manual (attached).
3.3 - INSTALLATION IN PLACES WHERE THERE IS THE RISK OF EXPLOSION (DIRECTIVE 2014/34/EU)
The solenoid valve complies with Directive 2014/34/EU as a device of group II, category 2G and as device of group II, category
2D; consequently, it is suited for installation in zones 1, 21, 2 and 22 as classified in Annex I of Directive 99/92/EC. The solenoid
valve is not suitable for use in zones 0 and 20, as defined in aforementioned Directive 99/92/EC. To determine the qualification
and size of the hazardous zones, please refer to standard IEC EN 60079-10-1.
If installed and subject to maintenance in full compliance with all conditions and technical instructions provided in this manual, the
device does not pose a source of specific hazards: in particular, under conditions of normal operation, it is not expected for the
solenoid valve to emit a flammable substance into the atmosphere with methods such as to originate an explosive atmosphere.
During installation and maintenance, it is imperative to comply with the Ex standards, in particular EN 60079-14. Electrical
installation must be carried out by authorised personnel in accordance with relative national regulations.
M16/RM N.C. EEX
DN 65 DN 80 DN 100
50 50 80
DN 125 DN 150 > DN 150
160 160 160
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Madas Technical Manual - REV. 0 of 10 May 2018
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