Regada REMATIC ULR 1PA-Ex, Инструкции по установке, обслуживанию и техническому обслуживанию, Страница: 34 / 52

32 ULR 1PA-Ex, ULR 2PA-Ex
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While connecting and disconnecting of the EA check the tightness of cable glands – those
with damaged sealings should be replaced by new ones of the approved type!
•
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.
5.3 Maintenance to assure
inexplosiveness
•
A 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:
Closure surfaces are:
1. Bottom enclosure and top enclosure
2. Bottom enclosure and crown wheel
3. Bottom enclosure and manual control case
4. Manual control case and manual control shaft
5. Moulded joint between the crown wheel and signaling disc
6. Threaded joint - bottom enclosure and stop screw
7. Threaded joint - bottom enclosure and cable glands
8. Cemented cylindrical gap - Top enclosure and sight Ex
9. Bonded threaded surface M8 LH-6H/6g, L= 6mm, thread
pitch 1.25, number of pitches 4.8, Loctite 243 - to prevent
against loosening of the stop screw
10. Bushing tube - Rear cover of local control
11. Threaded joint - Bushing and bushing tube
12. Threaded joint - Bushing tube and bottom enclosure
13. Cover sight and front cover
14. Cover sight and rear cover.
Enclosure joint surfaces are designed according to the
requirements of table 2 and 3 EN 60079-1 within valid edition
To seal the gaps against entry of fluids and dust, O-rings are
used from the outside except for the gap of flameproof
enclosure.
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