Description
2522-34-46
9
3.1.3
Display - Vacuum- / Pressure Regulator
The Vacuum Regulator shows pressures at below atmospheric pressure.
The Pressure Regulator gives pressure above atmospheric.
The reference point for both gauges is atmospheric pressure.
WARNUNG !
Please keep in mind that the barometric pressure changes from day to day.
This also changes the displayed pressure values because of latent air pressure
fluctuations.
3.2
Additional protection measures against liquids in the pump
3.2.1
Condensate separator (Suction side)
To prevent accidental ingress of liquids (condensate) in the pump, a plastic separator with
ball check valve is mounted on the suction side regulator.
If the possibility of penetration of larger liquid quantities which exceed the capacity of the
separator, we recommend the additional installation
(Fig. 2)
of a larger collection vessel (eg.
Woulff bottle).
Fig. 2 Additional separation vessel between the pump and apparatus
3.2.2
Cold trap (Suction side)
The installation of an appropriate cold trap is required when a larger amount of steam (water,
solvent) is obtained which exceeds the tolerance of the vapor pump.
The refrigerant used is usually dry ice or dry ice mixture with an acetone or alcohol.
Maintenance:
The refrigerant must have the highest possible level in the cold trap.
The rise in pressure in the connected vacuum apparatus indicates that the cold trap is satu-
rated.
For cleaning remove the cold trap and defrost. The condensate must be disposed of prop-
erly. The cool trap is, if applicable, clean with a detergent and dry.
