C2020IE - Pump 888 - Rollo - Rev. 1 June 2002 Page 2 of 8
the non-observance of the information presented in this manual.
Any modification to component parts of the system or the different destination of use of this system or its parts
without prior written authorisation from DROPSA S.p.A. will absolve the latter from any responsibility for injury or
damage to persons and/or property and will release them from all obligations arising from the guarantee.
The list of importers and instructions for ordering the required model are shown in Section 4.
1.0
DESCRIPTION OF THE PUMP
The Rollo is a range of motor driven pumps for mineral oil and grease.
The body of the Rollo is in aluminium coated with a special anticorrosion paint; the pump elements are in ground
and lapped steel. The pump is supplied as standard with one pump element assembly and with a capacity to deliver 6
cm
3
/min. On request it is possible to mount up to three pump element assemblies (note that the number of pump
element assemblies required must be stated at the time of ordering).
CHARACTERISTICS
PUMP 888 - Rollo
Electrical piston pump
Max. pressure-bar
(psi)
250
(3625)
Flow rate
6 cm
3
/min
Tank capacity
Litres/Kg
2 or 4
Max. working time
(min) for 50 W version
5
(min. pause time/work time (lubrication) ratio
is 3:1)
Max. working time
(minimum for 120 W version)
unlimited
Lubricant characteristics
at temperature of use
cSt
Oil Viscosity = min. 15 cSt
Max. grease consistency NLGI 2
Temperature of use; for situations
outside this range contact Dropsa
Engineering Dept
- 5
°
C - + 40
°
C
Motor
24 VDC
The motor can operate at voltages between 12
and 30 VDC
Absorbed power
50 W/120 W
Tank
In transparent technopolymer - capacity 2 Kg
1.1
Auxiliary pump element
(Part N° 888042)
The pumps are supplied with one only pump element, but are pre-prepared for the mounting of another one or two
pump elements.
This allows the feeding of more than one line independently or to combine the output of two or three pump elements
to double or treble the flow rate.
Pump element characteristics:
Piston Ø 6 mm
Useful piston stroke: 6 mm
Body capacity: 0.17 cm
3
/ stroke
1.2
Minimum level indicator
A permanent magnet located in a float (pump part N° 888120) or in the pressure disk (pump part N° 888110) actuate
a “reed” contact inside the float guide rod or the pressure disk piston.
Maximum commutable power: 26 VA. Max. voltage: 120 VDC. Max. current: 0.8 A.
