ESAB A6 CRE 30, Инструкция по эксплуатации, Страница: 7 / 16

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2.3 Function
The air drying units work on the cold regeneration principle and use two air con-
tainers ( 1 ) alternately.
1. When the left container is in use damp air passes through solenoid valve Y1 up
through the desiccant container and out into the supply system through
non--return valve BV1 and the dust filter ( 3 ).
Meanwhile the right container is regenerated using a small proportion of the
dried air.
2. Regenerating air is taken from the outlet through a drilled hole in non--return
valve BV2 which allows a predetermined amount of air to flow through.
3. The dried air passes slowly down through the desiccant container, carrying
moisture with it, and passes into the open air through solenoid valves Y1 and Y2 .
4. When the left container has been used for a while solenoid valve Y2 closes and
pressure begins building up in the right container.
5. When the pressure in the two containers is equal, solenoid valve Y1 switches
over so that the right container becomes the working one and the dried air is fed
out into the supply system through non--return valve BV2 and the dust filter ( 3 )
and manifold.
6. After a short period solenoid valve Y2 opens to expel moist air from the left
container, which is now regenerated in the same way as before.
1. Desiccant containers.
Equipped with gauges.
2. Manifold
3. Dust filter
(submicrofilter and 25 2 m. filter insert.).
4. Oil filter
(submicrofilter and 25 2 m. filter insert.).
5. Enclosed box containing control circuitry
for air flow.
6. Solenoid valves for controlling air flow (
Y1,
Y2 ).
7. Dew point indicator (indicates dew point of
air at --26
_
C).
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