Mobile Technology
Priority Valve for
Mobile Hydraulics
MPV...
E 10.116.2.0/03.07
DESCRIPTION
1. DESCRIPTION
1.1. APPLICATIONS
In mobile hydraulics, for example:
Priority supply of a closed centre
steering system
1.2. GENERAL
z The priority valve MPV for
flange-mounting is used where
one hydraulic function is to have
a priority supply over another.
z When the priority function is
operated, the required fluid
volume is diverted from the
pump flow.
z The remaining oil flow is fed to
other functions.
2
E 10.116.2.0/03.07
Δp [bar]
Q [l/min]
FUNCTION
Example circuit:
2. TECHNICAL
SPECIFICATIONS
2.1. GENERAL DATA
2.1.1 Weight
approx. 1.6 Kg
2.1.2 Construction / Operation
Flange connection, hydraulically
operated
2.2 HYDRAULIC DATA
2.2.1 Max. pressure
p
max
= 250 bar
2.2.2 Max. flow rate
Q
max
= 60 l/min
2.2.3. Max. pressure drop
Functions 1 and 2 are supplied by a fixed delivery pump. Function 1 has the priority
in this case.
1st condition:
Function 1 requires less flow than the fixed delivery pump supplies.
In the initial state, port P of the priority valve is connected to outlet A. The oil flow
supplies function 1. The pressure at P of function 1 is transferred to port X of the
priority valve via control line 3.
The control pressure LS of function 1 is fed to the opposite side of the spool via port
Z. In addition to the control pressure, the spring also acts on the opposite side.
If function 1 does not require any oil, the pressure increases at ports P and X. If the
pressure at port X is greater than the sum of the control pressure at port Z and the
spring force, the spool switches over and port P of the priority valve is connected to
outlet B.
The oil then flows to function 2.
2nd condition:
Function 1 suddenly requires full flow from the fixed delivery pump.
Function 1 requires oil and the pressure in port P of function 1 decreases.
If the sum of the control pressure in port Z of the priority valve and the spring force is
greater than the pressure at port X, the spool switches back.
Port P of the priority valve is connected to outlet A.
Function 1
(e.g. steering)
Function 2
(e.g. working hydraulics)
2.2.4 Operating fluid
Mineral oil to DIN 51524
2.2.5. Viscosity range
2.8mm²/s - 380mm²/s
2.2.6. Seal material
NBR or FPM
(depending on the model)
2.2.7. Filtration:
Max. permissible cleanliness
class of the operating fluid to
NAS 1638 Class 9
2.2.8. Ambient temperature range
- 20°C - +80°C
2.2.9 Oil temperature range
- 20°C - +80°C
measured using MPV-10-F-10-011
0,0
1,0
2,0
3,0
4,0
5,0
6,0
7,0
8,0
9,0
10,0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
P-B
3
E 10.116.2.0/03.07
3. MODEL CODE
(also ordering example)
MPV 10- F- 10 - XXX - XXX
Priority valve for mobile
Nominal size
Mounting type
F = flange housing
Control pressure of the spring
10 = 10 bar
Type
Spool / Control
Series
(determined by manufacturer)
Other types available on request
4. DIMENSIONS
NOTE
The information in this brochure relates to the operating
conditions and applications described.
For applications or operating conditions not described,
please contact the relevant technical department.
Subject to technical modifications.
Type 02X
Type 11X
Type 03X
Required interface
of the mounting surface
Required surface finish
of the mounting surface
86.5
approx. 68
8.5
0.01
47.2
43.6
7.1
5.6
58
0
10
