User Manual
Mounting and Installation Notes
D668 Serie – Servomotor-Driven Proportional Valves
1 Safety
Handling the valves / machines
WARNING
!
Carrying-out work on the valves/machine during
operation
Carrying-out any work during operation, such as e.g.,
hydraulic connection of components, can cause un-
controlled sequences of motions, malfunction, and
others, and thus may result in fatalities, serious
personal injuries and serious damage to property.
During operation, do not carry out any work on
the valves/machine.
Before working on the valves/machine, stop the
machine and switch off the supply voltage.
Secure
the
Examples of suitable securing measures:
• Lock the main command device and remove
the key.
• Attach a warning sign to the master switch.
WARNING
!
Hydraulic fluid squirting out
Hydraulic fluid squirting out under high pressure or
parts falling off can cause serious personal injuries,
burns and fires.
Before
working
depressurize
accumulators.
When mounting the valves, observe the
specification of the installation screws and the
mounting pattern and ensure the presence,
elasticity, integrity and correct seating of the O-
rings.
Observe the maximum operating pressure.
Please pay attention for signs, such as a slight oil
leak or "sweating", which may indicate an
assembly error and/or component failure.
WARNING
!
High electrical voltage
Danger to life by electric shock.
Only operate the valves with a permanently
installed equipment grounding conductor.
Disconnect the power supply before accessing
drive components.
Observe the discharge times of the capacitors.
WARNING
!
Wrong handling
Wrong handling of the valve, tools or accessories
may result in fatalities, serious personal injuries and
serious damage to property.
Only properly qualified and authorized users may
work with and on the valves.
When working with and on the valves/machine,
observe the machine manufacturer's notes and
instructions.
Mounting and Installation Notes D668 (B97072-668-001; Version A, 06/21)
machine
against
restarting.
on
the
valves/machine,
all
hydraulic
lines
and
CAUTION
!
Misuse of the connectors, mating connectors
(plugs) and connection cables
Misuse, such as e.g., use as foot hold or transport
fixture, can cause damage and thus may result in
personal injuries as well as further damage to
property.
Use the connectors, mating connectors and
connection cables exclusively for the connection
of the valve.
Occupational safety and health
WARNING
!
Magnetic and / or electromagnetic fields
May lead to severe personal injury.
Persons fitted with heart pacemakers, metallic
implants and hearing aids etc. must not be
allowed access to:
• Areas in the immediate vicinity of electrical
equipment.
• Areas where electronics components and
servo drives are installed, repaired and
operated.
• Areas where valves are installed, repaired and
operated. Permanent magnets in servomotors
pose particular hazards.
CAUTION
!
Falling objects
Falling objects, such as e.g., valves, tools or
accessories, may result in personal injuries and
damage to property.
Wear suitable safety equipment, such as e.g.,
safety shoes or helmet.
CAUTION
!
Hot surfaces of valves and hydraulic lines
Valves and hydraulic lines can become very hot
during operation. Contact may result in burns.
Wear suitable safety equipment, such as e.g.,
work gloves.
CAUTION
!
Noise emission
Depending on the application, significant levels of
noise can be generated when the valves are
operated. This may result in hearing damage.
Wear suitable safety equipment, such as e.g.,
ear protection.
CAUTION
!
Skin contact with hydraulic fluid
Skin contact with hydraulic fluid may result in
personal injuries.
Observe the safety regulations applicable to the
hydraulic fluid used.
Wear suitable safety equipment, such as e.g.,
work gloves.
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