UNI-Geräte E. Mangelmann Elektrotechnische Fabrik GmbH
Holtumsweg 13, D-47652 Weeze, Tel. +49 2837/9134-0, Fax. +49 2837/1444
www.uni-geraete.de [email protected]
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TM 4021
220.100.038-18
Solenoid drive
Series MG.., MG..A, MG..A..C (no explosion protection)
Series MG..Xn, MG..A..Xn, MG..A..C..Xn (with - protection
for the intended use in zone 2) in accordance with
2014/34/EU (ATEX 95))
Operating instructions
(translation)
Explosion protection
The explosion protection is an option and is indicated by an Ex type plate on the solenoid actuator. The
solenoid actuators and integrated solenoid valve controllers conform to explosion protection type "na"
category II3G and can be used in zones in which explosive gas, vapour, mist or air mixtures may occur, i.e.
in explosion zone 2. The electrical and thermal parameters of the separate variants can be obtained from
the respective type plates. The explosion protection applies to operation of the device. For installation,
maintenance or repairs, it is imperative that the relevant explosion protection regulations, especially EN
60079-14 (VDE 0165 T1), are observed. The electrical installation work must be carried out by, or under
the supervision of, a skilled electrician, with additional observance of the relevant national regulations (VDE
0100 in Germany). Prior to installation, the constraints of the device marking must be compared against the
envisaged operating conditions to ensure operation is as intended.
Basics
Valve – solenoid actuator – combinations are supplied fully assembled and tested as standard. When
replacing or changing solenoid actuators, care should be taken that the combination with a UNI valve is
approved and the magnet is properly secured to the valve (permissible tightening torque, for example). The
device-specific serial number for unequivocal identification and the year of build can be obtained from the
type plate.
Solenoid actuators are electrotechnical components that are inoperative without the associated valve and
also may not be operated for themselves alone! For outdoor installations always use solenoid actuators
with a IP65 rating and a rain cover. Any solenoid actuators showing signs of damage are not to be installed
and must be replaced. If the solenoid actuators are subject to external loads of an exceptional kind,
additional protective measures are to be taken by the operator, if required. Any undefined or unsuitable
changes to the device may negatively influence the explosion protection and in the worst case even render
it totally ineffective. UNI devices shall accept no liability for any loss or damage (to the device/over and
above this) which have been brought about by change(s) to the device. The same applies for claims under
the warranty.
Description of the device
The solenoid actuator (pot magnet) is used as an actuating unit for valves. Constructionally the actuator
consists of a magnet housing (tube, base, magnetic disk and lid), a coil and electronics. Depending on the
version, the solenoid actuator may be operated with DC or AC voltage. The version that runs off AC
voltage has a built-in rectifier. Therefore when energised, direct current flows through the coils of all types.
The solenoid actuators of type MG… have a conventional coil with a winding and resulting average
sustained pickup forces with average current consumption in continuous operation. The solenoid actuators
of type MG…A.. and MG…A..C on the other hand have two windings on their coil body. One pickup and
one holding winding. The TS… / RKS… built-in valve controller (rudimentary in "…A…" actuators) switches
over after a defined time from the higher pickup power to the lesser holding winding power. In this way,
very high pickup forces can be achieved short-term with simultaneous low current consumption in
sustained (holding) operation.
