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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 

(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 

°

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

/ 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. 
 

Содержание Rollo 888

Страница 1: ...fully kept in good condition and is always available to persons requiring to consult it To request further copies updates or clarifications with respect to this manual contact the Engineering Departme...

Страница 2: ...ectrical piston pump Max pressure bar psi 250 3625 Flow rate 6 cm3 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 work...

Страница 3: ...ed Min pause time Three times the functioning time Unlimited 2 0 TECHNICAL SPECIFICATIONS 2 1 Fixing and overall dimensions 2 2 Electrical system Technical data Motor driven piston pump Electrical pow...

Страница 4: ...grity of the pump Fill the tank with suitable lubricant Verify that the pump is at operating temperature and the tubing free from air bubbles Check that the electrical connections have been effected c...

Страница 5: ...at the same time tilt it until the passage of air is permitted eliminating the existing difference in pressure between the zones above and below the pressure disk 3 4 2 Removing the tank Where it is n...

Страница 6: ...trol Reassemble and refill the tank using the side connector equipped with a filter with suitable grease and run the pump ensuring that the grease exits free from air bubbles If necessary remove the a...

Страница 7: ...based additives Seizure of the pump Petrol solvents inflammable liquids Fire explosion damage to seals Corrosive products Corrosion of the pump injury to persons Water Oxidation of the pump Food subs...

Страница 8: ...ance with the following standards and harmonised technical specifications EN 292 1 EN 292 2 EN 50081 2 EN 50082 2 EN 1050 Technical Manager Ing Walter Divisi Product Manager Name DROPSA SpA Vimodrone...

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