TECHNICAL INFORMATION
10/16
87-900-977-01(C)
VACUUM SEALS
The seals in the circuit are obtained by means of
VITON gaskets.
Sealing of the rotor shaft is guaranteed by a rotat-
ing gasket with dust-guard lip.
The suction flange and duct are sealed by mean of
OR gaskets.
GAS BALLAST VALVE
When the pump sucks in vapors, these condense
during compression and mix with the oil, forming
an emulsion (an aqueous vapor, for example) or a
solution (organic solvent vapors, for example).
A number of problems arise from this, such as the
impossibility of obtaining high vacuums, the altera-
tion of the properties of the oil, could cause scaling
on parts of the pump.
To avoid this, during compression at the second
stage, atmospheric air is let into the pump through
an adjustable valve, or “gas ballast valve”, located
at the top of the pump.
In this way, the discharge valve of the second
stage opens through the effect of the atmospheric
air before the partial pressure of the vapor reaches
saturation point, thus preventing condensation
from occurring. The vapors are expelled mixed
with air.
TECHNICAL DATA
The following table lists the main technical data of
the DS42.
TECHNICAL DATA
Hz
UNITS
VALUE
FREE AIR DISPLACEMENT
60
l/min (cfm) 45.5 (1.6)
50
l/min
(m
3
/h) 38 (2.3)
PUMPING SPEED *
60
cfm
1.2
50
m
3
/h 1.8
ULTIMATE PARTIAL PRES-
SURE *
mbar
10
-4
Range
ULTIMATE TOTAL PRES-
SURE *
mbar 4x10
-3
ULTIMATE TOTAL PRES-
SURE WITH GAS BALLAST *
mbar 2x10
-2
WATER VAPOR TOLERANCE
mbar
15
WATER VAPOR CAPACITY
g/h
60
OIL CAPACITY min/max
l
0.6
MOTOR RATING 1ph
50/60
kW
0.4
NOMINAL ROTATION SPEED
50
rpm
2280
60
rpm
3480
OIL TEMPERATURE
°C
60
(pump operating) **
°F
140
Installation category
II
Pollution degree
2
OPERATING TEMPERATURE
RANGE
°C 12-40
WEIGHT
Kg
11.0
lb
24
INLET FLANGE
DN
16
EXHAUST FLANGE
DN
16
Dimensions:
- length
mm
309
- width
mm
173
- height
mm
192
Input single phase versions
Nominal voltages:
50/60
V
220-240
50/60
V
100-110
Maximum currents:
50
A
1.8
60 A
2.7
Fuse (slow-blow type)
6
Lubricant 949-9305
RV Fluid
DS 31
Type
*
According to PNEUROP 6602
** At ultimate total pressure, 20 °C (68 °F) room temperature
