Pompetravaini TRSK 2002/1, Руководство по эксплуатации, Страница: 8 / 32

Operating manual liquid ring vacuum pumps TRVK - TRSK
8
4 - PUMP OUTLINES
The instructions given in this manual are for liquid ring vacuum pumps and compressors and for systems type
HYDROSYS which utilise said pumps.
NOTE:
Capacities, vacuum and pressures are nominal and are the maximum attainable values under standard
operating conditions. Please contact POMPETRAVAINI for data on liquid ring compressors series TR…
TRVK
Single stage liquid ring vacuum pumps
Capacity to 22500 m
3
/h, max vacuum 40 mbar
TRSK
Two stage liquid ring vacuum pumps
Capacity to 37000 m
3
/h, max vacuum 180 mbar
4.1 - PRINCIPLE OF OPERATION (see figure at side)
The aspirated gas enters the pump chamber A-B via the pump suction flange. The
gas is trapped between 2 impeller vanes. The impeller rotates eccentrically in
relation to the centreline of the liquid ring that, by centrifugal force, assumes the
shape of the impeller casing. The progressive change of volume between the 2
vanes, the impeller hub and the liquid ring first creates a vacuum and then a
compression of the gas in the B-C area till the gas is discharged, together with a
portion of the liquid, through the discharge port C-D. The lost liquid must then be
replenished.
4.2 - SERVICE LIQUID PROPERTIES
For a good operation the liquid ring pumps must be supplied with a service liquid which is clean, non abrasive and free
of any solids.
The service liquid temperature should not exceed 80°C and the gas handled should be maximum 100°C; the liquid density
should be between 800 and 1200 g/dm
3
and the viscosity should be less than 40 cSt (the pump performance will change
if the service liquid has properties different than those of water at 15°C). All engineering data is based on the use of 15°C
as service liquid, see chapter 17 for additional information.
Contact POMPETRAVAINI before using liquids with properties outside the ranges listed above.
B
D
A
C