Regada SO 2-Ex, Installation, Service And Maintenance Instructions

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SO 2-Ex 27
5.3 Maintenance to assure inexplosiveness
A half an hour before removing of the actuator cover it is needed to switch power supply off. The given
period is required to assure cooling of the electric motor and the space heater below the admissible temperature
value of the temperature class T5 (+100°C).
The fixing screws of the upper cover have to be always in full numbers, i.e. 4 pcs, with flexible washers
and tightly fastened.
The actuators with damaged closing surfaces, e.g. scratches, rifts, etc. have to be immediately put out of
operation.
•
While connecting and disconnecting of the EA check the sealing rings of the cable leads – damaged and
worn sealing should be replaced by original rings!
•
Keep the EA clean and take care about removing impurities and dust. The cleaning has to be performed
regularly according to the operation possibilities and requirements.
•
Reparation of EA (basically the parts the resisting closures consist with, have substantial influence on safety)
is allowed perform only by producer, witch according to certificated documentation and by performing of
required tests (inclusive of static pressure test of resisting clouser parts guarantee the fulfil required
standardes and rules for this products.
The closing surfaces are (Fig.10):
the connecting surface of the upper cover and the lower case (1),
the cylinder part of the manual control mechanism flange and shaft (2),
the cylinder part of the lower case and the cylinder part of the manual control mechanism flange (3),
the cylinder part of the lower case and the cylinder part of the crown wheel flange (4).
the cylinder part of the crown wheel and of the indication shaft (5)
Enclosure joint surfaces are designed according to the requirements of table 2 and 3, EN 60079-1,
To seal the gaps against entry of fluids and dust, O-rings are used from the outside except for the gap of
flameproof enclosure.
Caution:
After disassembly and re-assembly of top enclosure and bottom enclosure (see gap of flameproof
enclosure 1 in chapter 5.3) the sealing O-ring must be replaced according following table:
O- Ringlet PNm Material Manufacturer
Bottom upper cover and the
lower case
62 732 XXX NBR
TRELLEBORG
SEALING
SOLUTIONS resp.
MEGAbelt SK, s.r.o.
!