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111DLFDi
Power Unit
HYDROPNEUMAnC POWER UNIT
GERARDI Hydropneumatic Power Unit for hydraulic clamping devices and its bi-products is designed to meet all needs regarding the
powering of hydraulic cylinders where low flow rates and high pressures are required. It is driven by air at its inlet to produce hydraulic
pressure at its outlet. The special design shape ofthe power unit is such that a high perfonnance system can be implemented taking up
very little space. Thanks
to
the special design principles, the pump section adopted allows the hydropneumatic power unit to be
installed in very hostile environments, such as the work area
of
machine tools, etc. The unique modular hydraulic flow control system
allows controlling up to 6 separate users fromjust one powerunit.
8PECFICATION
MAX. PERMISSIBLE INLETAIR PRESSURE:
RECOMMENDED INLETAIR PRESSURE:
OIL DELIVERIES: 1.2-1.4-2.2-2.7-4.3
MAX. OIL OUTLET PRESSUREAT 5 BARAIR INLET PRESSURE:
~
M8
MAX. NO. OF USERS RECOMMENDED:
130
OuHet pressure can
be
regulallld and
set
to
desired preesure.
7bar
5,5
bar
Lltenllmln
400bar
6
Art.
393 • Power unit with Manual control, Art. 394 • Power unit with Pneumatic control,
Art.
395 ·Power unit with
Electrical control
The pump in its basic version is supplied complete with teflon tank, fill plug, silencer, quick acting air connector fitting and hydraulic
control box.
Very suitable for operating Single Acting Swing Clamps.
POINTS TO REMEMBER
Ifuserwants
to
change the length ofthe single ann ofa clamping cylinder, it should be noted thatthe length must be less than 1.2
times the standard length in order to avoid serious slanting of the piston rod. If the length in design needs
to
be larger than the
aforesaid limit value, it is better to use double arms in order to extend the life of the cylinder. Double anns are anns extended
equally on the other side of piston rod with a support
of
same height as the workpiece.
Workpiece should not be clamped within the swing stroke during the downward movement
of
the clamping ann, and should be
clamped within the vertical stroke only.
During the loading and unloading ofa workpiece, it is necessary to use an air gun to clean the cylinder for removing the iron slag
orforeign objects attached thereon in order to preventthe foreign objects from entering the seal
to
cause oil/ air leakage.
It is necessary to usedevice having
F.
R.L. (Filters
I
Regulators
I
Lubricators) function in the pneumatic Iine in order to effectively
remove the moisture, lubricate the cylinder and avoid the damage of the swing mechanism due to inertia impact ofthe clamping
ann.
If the direction ofthe single ann needs to
be
changed due to the problem ofpiping, itshould be donewith a wrench by holding the
clamping ann first, and then unscrewing the screw and knocking the clamping arm upward to change its direction as shown in
figure below. One should not apply lateral force
to
the clamping arm or laterally impact the clamping arm
to
change its direction in
assembled position. This can cause damage ofthe swing mechanism due to improper force applied on it.
Fitting and removing clamping arm:
Hold clamping arm with spanner.
lighten/loosen screw.
Knock out clamping arm from
piston rod.
cautlonl Do not strike sides
of
clamping arm.
RIL signifies right hand swing
I
Left hand swing. Please indicate while ordering. In right hand swing, when seen from above
while clamping down, the arm first swings 90 degrees* clockwise and then clamps down whereas in left hand swing it
rotates 90 degrees counterclockwise and then clamps down.
*Clamps with swing angle other than 90 degrees are also available. Otherswing angles available are 60° and 45°.
The powersource should not exceed the rated maximum pressure and the highest flowvalue.
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