DROPSA nano Progressive Replaceable Installation guide
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nPR
Divider
“nano Progressive Replaceable”
User operation and Maintenance
manual
Original instruction
INDEX
1. INTRODUZIONE
2. DESCRIZIONE GENERALE
3. CARATTERISTICHE TECNICHE
4. PACCHI DOSATORI E LORO IDENTIFICAZIONE
5. DISPOSITIVI DI CONTROLLO DEL CICLO
6. INDICATORI DI RILEVAMENTO PRESSIONE
7. TUBI, RACCORDI E VALVOLE
8. COMPOSIZIONE DEL PACCO DOSATORI
9. INFORMAZIONE D’ORDINE
10. DIMENSIONI
11. PROBLEMI E SOLUZIONI
12 PROCEDURE DI MANUTENZIONE
13. SMALTIMENTO
14. MOVIMENTAZIONE E TRASPORTO
15. PRECAUZIONI D’USO
16. CONTROINDICAZIONI D’USO
C2220IE – WK 37/13
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2
1. INTRODUCTION
This operation and maintenance manual refers to “nPR – nano Progressive Replaceable”. This divider allows
lubrication systems to distribute oil and grease with working pressure up to 300bar (4350psi).
You can obtain the latest release of this document by contacting a Dropsa sales office or distributor or by visiting us on
the World Wide Web at http://www.dropsa.com.
The installation and use of this product must be qualified staff with basic hydraulics and (in the case of sensor
devices) electrical knowledge.
This manual contains important information on health and safety issues for the personnel. It is recommended to
attentively read this manual and carefully keep it in good condition so that it is always available to personnel requiring
to consult it.
2. GENERAL DESCRIPTION
nPR is a oil or grease divider valve that allows, through the progressive movement of spools, partition the
inlet flow in precise quantities to a number of different outputs available.
The lubrication cycle can be controlled and monitored by a single sensor (nPr is prepared for the use of
various types of sensors) mounted on any metering elements.
These metering elements may be used in different system configurations and have different working
configurations that make them flexible for use in multiple applications. The compactness makes them
particularly suitable for use in small areas. nPr uses an innovative rail & lock concept to allow the element to
be replaced or re-organized without the need to completely dismantle the assembly. This is an industry first
for segmented progressive dividers allowing quick easy modification or replacement of an assembly element
without the cost of a separate base porting module.
3. CARATTERISTICHE TECNICHE
“nPR – nano Progressive Replaceable” product has the following general characteristics:
Single outlet flow rate
0.0015 cu.inch – 0.0027 cu.inch – 0.0045 cu.inch - 0.0064 cu.inch (0,025cm³ -
0,045cm³ - 0,075cm³ - 0,105cm³)
Number of divider elements
3 ÷ 12
Working pressure
15bar (218psi) ÷ 300bar (4350psi)
Working temperature
-20°C ÷ +80°C
Material
Nickel-plated steel
Number of inversion at minute
200 max.
Inlet thread
G1/8” – UNI ISO 228/1
Outlet thread
G1/8” – UNI ISO 228/1
Lubricants
Oil min. 32 cSt – grease max. 2 NLGI
N.B.: The pressure is directly proportional to the number of cycles.
The oil and grease viscosity values must always refer to the equivalent viscosity at operating temperature.
4. DIVIDER BLOCKS AND LABELLING
Each divider is composed of a minimum of 3 elements up to a maximum of 12. At the metering elements must be
added the initial and the end elements with fixing screws. Besides there are different necessary components for
cycle monitoring, for merge or to separate the outputs of dividers, to specify working pressure etc.
4.1 INLET ELEMENT
The Inlet element is available with two different fixing hole centers in order to allow easy interchangeability with
existing models.
PART NUMBER
DESCRIPTION
0645647
INLET nPR- "nano Progressive Replaceable"
0645648
INLET nPR- "nano Progressive Replaceable" S - 20mm wheelbase reduced
3
4.2 METERING ELEMENT
Metering elements are available with 4 different flow rates. Each nPr- Nano Progressive can be assembled with a
minimum of 3 elements and maximum of 12.
Q. cm³
Part No.
DESCRIPTION
0,025
0645650
nPR 025-DOSATORE "nano Progressive Replaceable"
0,045
0645651
nPR 045-DOSATORE "nano Progressive Replaceable"
0,075
0645652
nPR 075-DOSATORE "nano Progressive Replaceable"
0,105
0645653
nPR 105-DOSATORE "nano Progressive Replaceable"
It's possible to combine the outlets into a single outlet by element replacing the yellow adaptor (Part number
0641709+0641791) with the white one as shown in the drawing below.
When two outputs are ported internally. Remember to plug the unused port (Part number 3232098).
It is also possible to combine the flow rates of a metering element with the next metering element in the assembly
by selecting an appropriate bridge metering element.
BRIDGE ELEMENT (The output flow rate is ‘bridged’ to next metering element as indicated by arrow)
LEFT
RIGHT
LEFT / RIGHT
CODE
PART NUMBER
CODE
PART NUMBER
CODE
PART NUMBER
nPR 025 L
0645654
nPR 025 R
0645658
nPR 025 LR
0645662
nPR 045 L
0645655
nPR 045 R
0645659
nPR 045 LR
0645663
nPR 075 L
0645656
nPR 075 R
0645660
nPR 075 LR
0645664
nPR 105 L
0645657
nPR 105 R
0645661
nPR 105 LR
0645665
10
Nm
10
Nm
0641709
0641791
0641708
3232098
10
Nm
Unscrew only 2 turns
to replacement of
element
4
Each metering device is identified with appropriate marking that shows the output per cycle, for example: “nPr 075”
corresponds to 0.075 cm³ output per cycle per outlet.
In the case of a bridge element, the bridging function is also indicated of outputs: “L” left bridge, “R” right bridge,
“LR” left and right bridge.
4.3 END ELEMENT
The end element is used to terminate the dividers assembly. The tightening screws should be have the torque
specified when completing the assembly.
You can order the components of dividers block separately. Remember that washers and assemblies screws must
be ordered separately also.
WASHERS
SCREWS
PART
NUMBER
N° elem.
PART
NUMBER
N° elem.
PART
NUMBER
N° elem.
PART
NUMBER
N° elem.
PART
NUMBER
N° elem.
PART
NUMBER
0016047
3
4
0014396
0014181
5
6
0014397
0014182
7
8
0014191
0014398
9
10
0014399
0014400
11
12
0014401
0014402
5. CYCLE CONTROL DEVICES
You can control the lubrication cycle installing a device that can be electric (Hall Effect sensor) or just a mechanical
visual sensor (with colour strip) that indicates the internal movement of the spool during the lubrication cycle. It is
recommended to install them on both master and secondary dividers on the secondary master in order to have
rapid feedback of any blockages or failures in the lubrication system and for ease of troubleshooting.
A) The Ultrasensor can be directly assembled on any divider without special arrangements.
ELECTRICAL CHARACTERISTICS
Max output power
2A – NPN
0,7A – PNP
Power supply
8 ÷ 28 VDC
Contact
NPN (NO)
PNP (NO)
B) Visual monitoring pin with colour strip. This must be ordered with the divider element.
DIVIDER with colour strip visual indicator
Q. cm³
PAR NUMBER
DESCRIPTION
0,025
0645678
VISUAL INDICATOR nPR 025 "nano Progressive Replaceable"
0,045
0645679
VISUAL INDICATOR nPR 045 "nano Progressive Replaceable"
0,075
0645680
VISUAL INDICATOR nPR 075 "nano Progressive Replaceable"
0,105
0645681
VISUAL INDICATOR nPR 105 "nano Progressive Replaceable"
CODICE
DESCRIZIONE
0645649
nPR-FINALE "nano Progressive Replaceable"
“ULTRASENSOR”
PART NUMBER
1655308
14
Nm
11Nm
1655308
5
6. OVER-PRESSURE INDICATOR
Pressure indicators are used to control pressure in main or secondary tubing. They can be applied directly on the
alternate outlet/indicator port that is standard on all nPr divider elements. There are three types of indicators that
give a different visual indication linked to the pressure set on the device. Below are shown the characteristics of
each pressure indicator and the part number.
The burst indicator must be replaced on each overpressure event. The lubricant will be discharged to atmosphere.
7. TUBING, FITTINGS AND VALVES
Tubing, fittings and valves used in conjunction with the divider must be rated at the max pressure which the system
can operate at. Below a selection of components that you can be useful to assembly the divider blocks.
PART
NUMBER
DESCRIPTION
PART
NUMBER
DESCRIPTION
0092335
1/8” valved fitting for OUTLETS
5119812
Ø6x1 Drawn steel tube (400bar)
0092555
1/8” valved fitting for INLET
5119832
Ø4x1 Drawn steel tube (500bar)
0092080
Ø6 comrpession fitting (150bar)
5118001
ASTM Ø6x0,71 Copper steel tube (310bar)
0092069
Ø4 bicone fitting (150bar)
5118000
ASTM Ø4x0,71 Copper steel tube (500bar)
0091942
Ø4 bicone fitting (250bar)
5501201
Ø4x0,5 Annealed copper tube (133bar)
3084577
Push-in Ø4 (65bar)
5501203
Ø6x1 Annealed copper tube (200bar)
3084578
Push-in Ø6 (65bar)
5717202
PA Ø4xØ2,5 Tube (60bar)
3084695
Swivel Push-in 90° Ø6 (150bar)
5717203
PA Ø6xØ4 Tube (50bar)
3084696
Swivel Push-in 90° Ø4 (150bar)
Indicator with pin and memory
(M)
Indicator with pin
(P)
Burst membrane indicator
(B)
Pressure [bar]
PART NUMBER
Pressure [bar]
PART NUMBER
Pressure [bar]
PART NUMBER
30
3290000
20
3290019
30
3290012
50
3290001
30
3290006
50
3290013
75
3290022
50
3290007
100
3290014
100
3290002
100
3290008
150
3290015
150
3290003
150
3290009
200
3290016
200
3290004
200
3290010
250
3290017
250
3290005
250
3290011
300
3290021
(The pin remains locked in position
until reset manually for ease of
troubleshooting).
The Pin retracts once the pressure
drops back under the indicator
limit.
In this type the membrane breaks
in case the pressure overcome the
set pressure.
6
8. DIVIDER BLOCKS ASSEMBLY
To order a Pre-assembled Assembly the following ‘string’ formation is used to identify the sequencing of the
elements and the order of assembly.
INLET Config. and PACK
ELEMENT configuration (repeat for N° element)
TYPE INLET N°
ELEMENTS
FLOWRATE
[cm³] OUTLET CYCLE
CONTROL
PRESSURE COTROL
OUTLET
FITTINGS
TYPE
PRESSURE
[bar]
POSITION
nPr
Empty
Standard
Hole centers
42mm
3÷12 025
0,025
Empty
both
US
Ultrasensor
right side
Mwith
memory
pin
30-50-75
100-150-200
250-300
L
left
OP4
Ø4 Push-
in
S
Reduced
Hole center
20mm
045
0,045
SL
single left
USL
Ultrasensor
left side
P
with rod
20-30-50
100-150
200-250
R
right
OP6
Ø6 Push-
in
075
0,075
SR
single right
V
visual right
side
B
with
membrane
30-50
100-150
200-250
LR
let right
OC8BK
1/8” BSP
valved
105
0,105
BL
bridge left
VL
visual left
side
UL
Single left
upper
OC8NK
1/8” NPT
valved
BR
bridge right
UR
Single right
upper
BLR
bridge
left & right
URL
Single
right & left
upper
U
Both Upper
UL
Single left
upper
UR
Single right
upper
Specify the full string of dividers block as in following example below:
- nPR 5 (105 BLR – 105 SR USL M 75 UR OC8BK – 045 SL M 100 UL OC8BK – 025 BLR – 075 OP4)
1° 2° 3° 4° 5°
Please note that LEFT and RIGHT are defined relative to the INLET element when viewed vertically from the bottom-
up as shown below.
5°
4°
3°
2°
1°
INLET ELEMENTS END
INLET
( −...)
7
9. ORDERING INFORMATIONS
INLET ELEMENT
PART NUMBER
DESCRIPTION
PART NUMBER
DESCRIPTION
0645647
INLET nPr
0645648
INLET nPr -S 20mm reduced hole centers
METERING ELEMENT
Q.cm³
PART NUMBER
DESCRIPTION
Q.cm³
PART NUMBER
DESCRIPTION
0,025
0645650
nPR 025- DIVIDER
0,075
0645652
nPR 075- DIVIDER
0,045
0645651
nPR 045- DIVIDER
0,105
0645653
nPR 105- DIVIDER
RBIDGE METERING ELEMENT
LEFT
RIGHT
LEFT / RIGHT
PART NUMBER
CODE
PART NUMBER
CODE
PART NUMBER
CODE
0645654
nPR 025 L
0645658
nPR 025 R
0645662
nPR 025 LR
0645655
nPR 045 L
0645659
nPR 045 R
0645663
nPR 045 LR
0645656
nPR 075 L
0645660
nPR 075 R
0645664
nPR 075 LR
0645657
nPR 105 L
0645661
nPR 105 R
0645665
nPR 105 LR
END METERING ELEMENT AND SCREWS
PART NUMBER
DESCRIPTION
PART NUMBER
DESCRIPTION
0645649
END nPR
0016047
Ø6 washer (order 2 per assembly)
SCREWS (order 2 per assembly)
N° elem.
PART
NUMBER
N° elem.
PART
NUMBER
N° elem.
PART
NUMBER
N° elem.
PART
NUMBER
N° elem.
PART
NUMBER
3
4
0014396
0014181
5
6
0014397
0014182
7
8
0014191
0014398
9
10
0014399
0014400
11
12
0014401
0014402
METERING ELEMENT WITH VISUAL CYCLE INDICATOR
PART NUMBER
DESCRIPTION
PART NUMBER
DESCRIPTION
PART NUMBER
DESCRIPTION
0,025
0645678
nPR 025-DOSATORE VISIVO
0,075
0645680
nPR 075-DOSATORE VISIVO
0,045
0645679
nPR 045-DOSATORE VISIVO
0,105
0645681
nPR 105-DOSATORE VISIVO
ELECTRIC CYCLE INDICATOR
PART NUMBER
DESCRIPTION
PART NUMBER
DESCRIPTION
1655308
“ULTRASENSOR”
0039999
M12 connector (without cable)
PRESSURE INDICATOR
With pin memory (M)
With pin (P)
With Membrane (B)
PART NUMBER
Pressure [bar]
PART NUMBER
Pressure [bar]
PART NUMBER
Pressure [bar]
3290000
30
3290019
20
3290012
30
3290001
50
3290006
30
3290013
50
3290022
75
3290007
50
3290014
100
3290002
100
3290008
100
3290015
150
3290003
150
3290009
150
3290016
200
3290004
200
3290010
200
3290017
250
3290005
250
3290011
250
3290021
300
TUBING, FITTING AND VALVES
PART NUMBER
DESCRIPTION
PART NUMBER
DESCRIPTION
0092335
1/8” valved fitting for OUTLETS
5119812
Ø6x1 Drawn steel tube (400bar)
0092555
1/8” valved fitting for INLET
5119832
Ø4x1 Drawn steel tube (500bar)
0092080
Ø6 Compression Fittings (150bar)
5118001
ASTM Ø6x0,71 Copper steel tube (310bar)
0092069
Ø4 Compression Fittings (150bar)
5118000
ASTM Ø4x0,71 Copper steel tube (500bar)
0091942
Ø4 ring fitting (250bar)
5501201
Ø4x0,5 Annealed copper tube (133bar)
3084577
Ø4Push-in (65bar)
5501203
Ø6x1 Annealed copper tube (200bar)
3084578
Ø6Push-in (65bar)
5717202
PA Ø4xØ2,5 Tube (60bar)
3084695
Swivel Push-in 90° Ø6 (150bar)
5717203
PA Ø6xØ4 Tube (50bar)
3084696
Swivel Push-in 90° Ø4 (150bar)
8
10. DIMENSIONS
Dimension in mm [in].
0645747 - INLET nPR
mm [inch]
0645748 - nPR-INIZIALE S -
20mm reduced hole centers
mm [inch]
“A” “B” “C” “D”
N°
elements
“A” “B” “C” “D”
N°
elements
42
[1.65]
6.2
[.24]
24
[.94]
76.3
[3]
3
20
[.79]
5.5
[.22]
30.5
[1.2]
82.8
[3.26]
3
90.3
[3.55]
4
96.8
[3.82]
4
104.3
[4.11]
5
110.8
[4.36]
5
118.3
[4.66]
6
124.8
[4.91]
6
132.3
[5.21]
7
138.8
[5.46]
7
146.3
[5.76]
8
152.8
[6.02]
8
160.3
[6.31]
9
166.8
[6.57]
9
174.3
[6.86]
10
180.8
[7.12]
10
188.3
[7.41]
11
194.8
[7.67]
11
202.3
[7.96]
12
208.8
[8.22]
12
9
11. TROUBLESHOOTING
Below is a trouble shooting table to show possible problems and solutions.
If you are in any doubt about the correct solution to fixing a problem, do not dismantle parts of the Bravo but
contact an Authorized Dropsa Sales and Service Point for technical assistance.
PROBLEM
POSSIBLE CAUSE
REMEDIAL ACTION
No Lubricant
from outputs.
Spool seized up
Replace the divider with another one with same
characteristics. It 's still appropriate make sure the metering
have been installed correctly
Blocked Tube
Unplug the outlet tubes and verify if the divider supply the
lubricant.
Line pressure is too low
Change the adjustment of the pressure control valve
(bypass) or of the pressure switch control (end line).
Dividers fitted for two outputs but
used for only one output.
When is used only one output make sure the divider
element is fitted the appropriate single outlet adaptor and
the unused outlet is plugged.
12. MAINTENANCE PROCEDURE
Ensure you have necessary personal protection equipment and gloves to avoid contact with oils or greases that may
cause skin irritation.
Dividers require no special servicing. However, every 1000h of operation it is recommended to check for correct
supply of lubricant to the lubrication points.
Whenever you perform any servicing on system make sure that power and hydraulics supply are disconnected.
13. DISPOSAL
During maintenance or disposal of the machine care should be taken to properly dispose of environmentally sensitive
items such as oils or other lubricants. Refer to local regulations in force in your area. When disposing of this unit, it is
important to ensure that the identification label and all the other relative documents are also destroyed.
14. HANDLING AND TRANSPORTATION
Prior to shipping, the equipment is carefully packed in cardboard package. During carriage and storage the product
can be exposed from -20 ° C to +90 ° C temperatures; however, it is necessary, in order to avoid damage, that the
installation and operation occurs only in ambients with minimum temperature has reached +5 ° C.
On receipt check that package has not been damaged. Then, storage the machine in a dry location.
15. OPERATING HAZARDS
It is necessary to carefully read about the instructions and the risks involved in the use of lubrication machines. The
operator must know the machine functioning through the User and Maintenance Manual.
16. PRECAUTIONS
Following is a list of dangers which have not been fully eliminated but which are considered acceptable:
•During installation there may be small low pressure oil seepage from the pump. Always use appropriate
protective clothing, gloves and take all necessary safety precautions;
• Skin contact with oil -> see requirements for the use of appropriate PPE;
•Unsuitable Lubricant. Lubricant characteristics are indicated on the pump and in this user manual. In any
case contact a Dropsa Sales and Support engineer (if in any doubts, contact the Technical Department Dropsa SpA);
•Adequate protection of the unit from mechanical impacts or harmful mediums must be considered by the
installation engineer or the systems integrator.
FLUIDS EXPLICITY NOT ALLOWED
Fluid
Dangers
Lubricants with abrasive additives
Lubricants with abrasive additives
Lubricants with silicone based additives
Lubricants with silicone based additives
Petrol – solvents – inflammable liquids
Petrol – solvents – inflammable liquids
Corrosive products
Corrosive products
Water
Water
Food substances
Food substances
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