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
