GENERAL INFORMATION / INSTRUCTIONS
DIRECTION OF ROTATION
Clockwise or anti-clockwise dened looking at the drive shaft.
HYDRAULIC FLUID
Mineral oil based hydraulic uid conforming to DIN 51524,
re resistant uids and biodegradable uids according to the
technical data shown in the tables on pages 5 ÷ 7. The system
should be designed to prevent aeration of the hydraulic uid.
FLUID VISCOSITY
The uid viscosity range for optimal use of MVP pump is
between 15 and 35 cSt (77 and 163 SSU).
Functional limit conditions are:
max.: 1500 cSt (6818 SSU) at start up at minimum tempera
ture of -25 °C (-13 °F) with straight and short inlet line.
min.: 10 cSt (58 SSU) at maximum temperature of 110 °C
(230 °F)
FILTRATION
To ensure the optimal performance and the maximum life to
the pump, the hydraulic uid must have and maintain a uid
contamination within the values shown in the table below.
Working pressure
bar (psi)
∆p < 140
(2030)
140 < ∆p < 210
(2030) (3045)
∆p > 210
(3045)
Contamination
class NAS 1638
9 8 7
Contamination
class ISO
4406:1999
20/18/15 19/17/14 18/16/13
Achieved with
lter ßx
(c)
≥75
according to ISO
16889
10 μm 10 μm 10 μm
Casappa recommends to use its own
production lters:
STORAGE
The storage must be in a dry environment.
Max storage time in ideal conditions is 24 months.
The ideal storage temperature is between 5 °C (41 °F) and
20 °C (68 °F). No problem in case of temperature between
-40 °C (-40 °F) and 50 °C (122 °F). Below -40 °C (-40 °F)
please consult our pre-sales department.
INSTALLATION
Check that the maximum coupling eccentricity stays within
0,25 mm (0.0098 in) to reduce shaft loads due to misalign-
ment. It is advised to use a exible coupling suitable to absorb
eventual rotational shocks. For applications with axial and ra-
dial loads exceeding published standards, consult our sales
department. The direction of rotation of the pump must agree
with the prime mover rotation. Before installation, the case of
the pump must be lled with uid.
05/10.2014
LINES
The lines must have a major diameter which is at least as large
as the diameter of pump ports, and must be perfectly sealed.
To reduce loss of power, the lines should be as short as possi-
ble, reducing the sources of hydraulic resistance (elbow, throt-
tling, gate valves, etc.) to a minimum. A length of exible tub-
ing is recommended to reduce the transmission of vibrations.
Before connecting the lines, remove any plug and make sure
that the lines are perfectly clean. Check that the drain line is
dimensioned in a way to guarantee a case pressure lower than
1,5 bar (22 psi) absolute. The drain line must be connected
directly (no lter, no valves, no oil cooler) to the tank and must
terminate below the oil level. Check that the dimensions of the
suction line guarantee a pressure equal or superior to 0,8 bar
(12 psi). Inlet pressure less than 0,8 bar (12 psi) could cause an
increase of noise emission, the decrease of the pump perfor-
mances and a reduction of its life expectancy.
STARTING UP
Check that all connections are secure and that the entire sys-
tem is completely clean. Add oil to the tank always using a
lter. Bleed the air from the circuit to help the lling. Turn on
the system for a few moments at minimum speed, then bleed
the circuit again and check the level of oil in the tank. Gradually
increase the pressure and speed of rotation up to the pre-set
operating levels, which must stay within the stated limits as
specied in the catalogue.
FOR VERY LOW TEMPERATURE
STARTING UP
We strongly recommend to warm up the oil before running the
machine. If this is not possible, the warm up of the oil and of
the pump should be carried out following these instructions:
• Start the pump in stand-by condition at minimum speed.
Keep this working condition until the pump case reaches
-20 °C (-4 °F)
• Increase slowly the displacement.Max pressure permitted:
50 bar (725 psi). The maximum permitted speed is strictly
connected to the layout of the inlet circuit; check that there
is no cavitation before increasing the speed.
• Keep this working condition until the oil temperature in the
whole system is -10 °C (14 °F).
• Maximum pressure can be achieved from now on.
• Always check the outlet ow to prevent cavitation damage.
All the temperature are referred to oil with viscosity ISO VG 32
according to DIN 51 519.
SUGGESTIONS
To prevent cavitation at low temperature we suggest:
• To warm up the tank
• To pressurize the tank
• To oversize the inlet hose
MVP
4 DCAT048-ID02