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Idiomas disponibles
7
OPERATING INSTRUCTIONS
The 71VHT series pumps have been specifically
designed to operate in environments with
atmospheres that are not potentially explosive, with
filtered soft water (see par. 9.7) and at a maximum
temperature of 110 °C.
Other liquids can be used only upon formal approval
by the Engineering Department or Customer
Service Department.
7.1
Water temperature
The maximum permissible water temperature
is 110 °C. To use the pump with water at higher
temperatures, it is best to contact our Technical or
Customer Service Departments.
7.2
Maximum pressure and flow rate
The rated specifications stated in our catalog are the max.
that can be obtained by the pump. Independently of the
power used, the maximum pressure and rpm indicated on the
specification label can never be exceeded unless prior formal
authorization is given by our Technical or Customer Service
Departments.
7.3
Minimum operating speed
The minimum speed allowed for these types of pumps is
100 rpm for non-continuous periods; any rpm other than
as shown in the performance table (see chapter 5) must
be expressly and formally authorized by the Engineering
Department or Customer Service.
7.4
Sound emission
The sound pressure detection test was performed according
to Directive 2000/14 of the European Parliament and Council
(Machinery Directive) and EN-ISO 3744-2010 with class 1
instrumentation.
A final detection of sound pressure must be performed on the
complete machine/system.
Should the operator be located at a distance of less than
1 meter, he will have to use appropriate hearing protection
according to current regulations.
To avoid any potential damage caused by the effects of
cavitation, the VHT series pump supply must be forced with a
booster pump. The higher the supply pressure, the longer the
life of all the pump's hydraulics will be.
For the right ratio between minimum supply pressures, related
temperatures and maximum rotation speed of the pump, refer
to the graph below:
At a water temperature of 110 °C, the minimum supply
pressure, measured directly on the suction line during pump
operation, must be 4.4 bar and the rotation speed of the
pump must be 600 rpm.
7.5
Vibration
The detection of this value shall be carried out only with the
pump set up on the plant and at the performance declared by
the customer. Values must be in accordance with regulations.
7.6
Brands and types of oils recommended
The pump is supplied with oil suitable for room temperatures
from 0 °C to 30 °C.
Some types of recommended oil are indicated in the table
below, these oils have additives to increase corrosion
resistance and fatigue resistance (DIN 51517 part 2).
Alternatively you can also use Automotive Gear SAE 85W-90
oil for gearing lubrication.
Manufacturer
Lubricant
AGIP ACER220
Aral Degol BG 220
BP Energol HLP 220
CASTROL HYSPIN VG 220
CASTROL MAGNA 220
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