Version with top liquid separator:
Circuit diagram:
Alternative thermostatically controlled operating liquid temperature:
Closed Circuit Cooling / Total Recovery
This arrangement provides for total recirculation of the operating liq-
uid. A heat exchanger is added to remove the heat of compression,
friction and condensation from the operating liquid before it is re-intro-
duced back into the vacuum pump. For prolonged operation at suction
pressure above 300 hPa abs (300 mbar abs) a circulating pump is nor-
mally installed and mandatory at suction pressure above 400 hPa abs
(400 mbar abs) or when suction pressure varies during cycling
operations.
The operating liquid level in the separator/recirculation tank should be
at, or slightly below, the centreline of the pump shaft. Provisions may
also be made for high level overflow and low level make-up. This will
help prevent starting the vacuum pump with the housing full of water,
which could overload the vacuum pump and the drive motor.
The heat exchanger W must be capable of removing approx. 85 per-
cent of the drive power and possibly appearing condensation heat.
Version with lateral liquid separator:
Version with top liquid separator:
Circuit diagram:
Mounting Position and Space
●
Make sure that the following ambient conditions will be complied
with:
–
ambient temperature: 5 ... 40 °C
–
ambient pressure: atmospheric
●
Make sure that the environmental conditions comply with the pro-
tection class of the drive motor (according to the nameplate)
●
Make sure that the vacuum pump will be placed or mounted hori-
zontally
●
Make sure that the base for placement / mounting base is even
●
Make sure that in order to warrant a sufficient cooling there will be
a clearance of minimum 0.1 m between the vacuum pump and
nearby walls
●
Make sure that no heat sensitive parts (plastics, wood, cardboard,
paper, electronics) will touch the surface of the vacuum pump
LA 0053-1111 A, LB 0063-1011 A
Installation and Commissioning
0870150638 / 091222
page 7
Summary of Contents for DOLPHIN LA 0053-0143 A
Page 27: ......
