Setting the pace since 1953
The capacity and degree of vacuum inside the tank can be adjusted by changing the speed of rotation and by not
using the vacuum control and pressure surge valves.
If the rotary blades vacuum pump is stopped with vacuum in the tank greater than -0.80 bar it is completely normal
that the entrance of air through the vacuum adjustment valve will take the depression in the tank to -0.80 bar.
Speed of revolutions P,H
Pressure
Vacuum
Cylinder outer temperature compression side [°C]
Operating time (long life blades)
Operating time with vacuum Ballast
Table 5
Failure to comply with these requirements could be detrimental to the health of the user or could damage the
rotary blades vacuum pump . If the density of the material to be pumped is significant, dilute or mix the same
material. The period of operation should be such as not to cause the maximum temperature to be reached.
A period of prolonged use without interruption can cause, in addition to overheating, damage to the blades.
-
9.3
STOP
To stop the rotary blades vacuum pump, stop the engine and disconnect the P.T.O. in order to prevent accidental operation of it.
-
9.4
CONTROL DEVICES
A handle, located at the top of the manifold, is provided for the control of intake and compression phases. This can be operated
manually. To establish in which direction the handle must be turned to select the suction or compression phase, follow the instructions
given by the manufacturer of the installation. If the reversing gear locks up, use a lever to lift the handle.
Selection of the intake or compression phase with the handle must be made with the Rotary blades vacuum pump
not operating.
-
9.5
TEMPERATURE INDICATOR (THERMO TAPE)
The temperature indicator is secured on the compression side of all the FAN versions
This temperature indicator provides two temperature readouts:
• In the lower part there there is a reversible scale that changes colour (from black to blue) at a
specific temperature (which ranges from 90°C to 120°C). This scale was designed to help the user and
to avoid overheating of the pump.
• In the upper right there is a blue square that is the irreversible indicator with a white dot in the center
that turns black when the temperature rises to 160°C. If the point becomes black it means that the
pump was used for more than 15 minutes at the maximum vacuum level (improper use of the pump)
and the pump must be disassembled and all the sealing gaskets and blades replaced.
PARAMETER
WORKING RATE
(RECOMMENDED)
[rpm]
1200
[bar]
0.5 - 1
[bar]
-0.91
[°C]
80 - 100
[min]
6 - 8
[min]
continuous
MAXIMUM SPEED
1500
1.5
-0.95
120
15
continuous
Figure 9
page 39