EM8
2 to 300 mbar (abs.)
EM8/B
20 to 800 mbar (abs.)
EM12
2 to 400 mbar (abs.)
EM12/B
20 to 850 mbar (abs.)
EM20
2 to 400 mbar (abs.)
EM20/B
20 to 850 mbar (abs.)
EM28
2 to 400 mbar (abs.)
EM28/B
20 to 850 mbar (abs.)
EM40
2 to 400 mbar (abs.)
EM40/B
20 to 850 mbar (abs.)
The ambient temperature and the inlet temperatures must be included between 5°
and 40°C. In case you get temperatures outside this range, please get in touch with
us. Handling of other types of gas or vapours must be declared in advance to P.V.R.
that will give the conformity to the specific use.
2.3 Forbidden use
ATTENTION:
The pump MUST NOT handle:
- liquids or solid substances;
- dangerous, explosive or aggressive gases and vapours;
- pure oxygen or air mixtures enriched with oxygen;
It is forbidden to use the discharge of the pump to create even limited
pressures.
ATTENTION:
It is forbidden to install the pump in a potentially explosive environ-
ment.
2.4 Protections
EM4 - EM4/B
The pump is supplied without inlet non-return valve.
To prevent the oil from coming back and the air from entering the chamber to be
pumped down during the stop operation, it is necessary to install an external non-re-
turn valve near the pump inlet port. Alternatively a solenoid valve might be used.
FOR ALL THE PUMP MODELS
The pump must be protected against suction of dust, solids or liquids.
For those applications where such a protection is not ensured, a vacuum gauge must
be installed on the oil tank for a visual check of the exhaust filter clogging. In order
to get an automatic pump stop, a pressure switch set at 0.5 bar can be installed. The
pump is supplied without electric control panel. The electric motor must be protected
according to the regulations in force.
ATTENTION:
In case of applications where the pump stop or failure can cause dam-
ages to people or things, safety measures for the system must be
adopted.
2.5 Accessories
The following accessories useful for the installation and the operation are available:
- external inlet filters;
- vacuum gauges / vacuum switches;
- pressure gauges / pressure switches;
- pipe fittings;
- vibration dampers.
3. SAFETY PRESCRIPTIONS
ATTENTION:
Despite of all the precautions adopted when designing the equip-
ment, there are some risk elements that arise during operation and
servicing.
HOT SURFACES
The temperature of the pump surfaces may exceed 70°C.
Install the pump in a protected area accessible only by authorized personnel, to
prevent possible personal injures by coming into contact with hot surfaces.
The pump can be placed inside other machines by adopting the necessary safe-
guards.
Before carrying out any maintenance on the pump, be sure the pump is cold.
HARMFUL SUBSTANCES EMISSIONS
The discharged air contains part of traces of oil mist.
Check the compatibility with the work environment. A failure or the seals wear
can cause an oil leakage. Avoid the dispersion to the ground and the pollution of
other materials. In case air containing dangerous substances must be pumped
down (for example, biological or microbiological agents), adopt filtering systems
before introducing air in the work environment.
Used oil coming from the pump must be disposed of in accordance with the
regulations in force in the Country of use.
Do not dispose into the environment.
12
ENG
