Cautions
Specifications
Model No.
Indication
Lever Design
Dimensions
External
Dimensions
Accessories
Performance
Curve
Lever Installation/
Removal Procedure
model
LHA-A
Swing Clamp
Quick Change Lever Type A
Cautions
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Notes on Hydraulic Cylinder Speed Control Unit
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Flow Control Circuit for Single Acting Cylinder
For spring return single acting cylinders, restricting flow during
release can extremely slow down or disturb release action.
The preferred method is to control the flow during the lock action.
It is also preferred to provide a flow control valve at each actuator
which has limited action speed (swing clamp, hydraulic compact
cylinder, etc.)
Accelerated clamping speed by excessive hydraulic flow to
the cylinder may sustain damage. In this case add flow control to
regulate flow. (Provide the flow control valve to the releasing
side if the lever weight is applied during release action.)
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Flow Control Circuit for Double Acting Cylinder
Flow control circuit for double acting cylinder should have meter-out
circuits for both the lock and release sides. Meter-in control can
have adverse effect by presence of air in the system.
【Meter-out Circuit】
【Meter-in Circuit】
In the case of meter-out circuit, the hydraulic circuit should
be designed with the following points.
① Single acting components should not be used in the same
flow control circuit as the double acting components.
The release action of the single acting cylinders may become
erratic or very slow.
Refer to the following circuit when both the single acting
cylinder and double acting cylinder are used together.
○ Separate the control circuit.
○ Reduce the influence of double acting cylinder control unit.
However, due to the back pressure in tank line, single action
cylinder is activated after double action cylinder works.
② In the case of meter-out circuit, the inner circuit pressure may
increase during the cylinder action because of the fluid supply.
The increase of the inner circuit pressure can be prevented by
reducing the supplied fluid beforehand via the flow control valve.
Especially when using sequence valve or pressure switches for
clamping detection. If the back pressure is more than the set
pressure then the system will not work as it is designed to.
Flow Control at the Release Side
Ｗ
Flow Control Valve
(Any location is OK)
Sequence Valve
Please pay attention to the cautions below. Design the hydraulic circuit for controlling the action speed of hydraulic cylinder.
Improper circuit design may lead to malfunctions and damages. Please review the circuit design in advance.
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1）It should be handled by qualified personnel.
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The hydraulic machine / air compressor should be handled
and maintained by qualified personnel.
2）Do not handle or remove the machine unless
the safety protocols are ensured.
① The machine and equipment can only be inspected or prepared
when it is confirmed that the preventive devices are in place.
② Before the machine is removed, make sure that the above-mentioned
safety measures are in place. Shut off the air of hydraulic source
and make sure no pressure exists in the hydraulic and air circuit.
③ After stopping the machine, do not remove until the temperature
cools down.
④ Make sure there is no abnormality in the bolts and respective parts
before restarting the machine or equipment.
3）Do not touch clamps while they are working.
Otherwise, your hands may be injured.
4）Do not disassemble or modify.
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If the equipment is taken apart or modified, the warranty
will be voided even within the warranty period.
1）Removal of the Machine and Shut-off of Pressure Source
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Before the machine is removed, make sure that the
above-mentioned safety measures are in place. Shut off the
air of hydraulic source and make sure no pressure exists in
the hydraulic and air circuit.
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Make sure there is no abnormality in the bolts and respective
parts before restarting.
2）Regularly clean the area around the piston rod.
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If it is used when the surface is contaminated with dirt, it may lead
to packing seal damage, malfunctioning, fluid leakage and air leaks.
3）If disconnecting by couplers on a regular basis, air bleeding
should be carried out daily to avoid air mixed in the circuit.
4）Regularly tighten bolts and pipe line, mounting bolts, nuts,
circlips and cylinders to ensure proper use.
5）Make sure the hydraulic fluid has not deteriorated.
6）Make sure there is smooth action and no abnormal noise.
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Especially when it is restarted after left unused for a long
period, make sure it can be operated correctly.
7）The products should be stored in the cool and dark place
without direct sunshine or moisture.
8）Please contact us for overhaul and repair.
1）Warranty Period
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The product warranty period is 18 months from shipment from
our factory or 12 months from initial use, whichever is earlier.
2）Warranty Scope
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If the product is damaged or malfunctions during the warranty
period due to faulty design, materials or workmanship, we will
replace or repair the defective part at our expense.
Defects or failures caused by the following are not covered.
① If the stipulated maintenance and inspection are not carried out.
② If the product is used while it is not suitable for use based on
the operatorʼ s judgment, resulting in defect.
③ If it is used or handled in inappropriate way by the operator.
（Including damage caused by the misconduct of the third party.）
④ If the defect is caused by reasons other than our responsibility.
⑤ If repair or modifications are carried out by anyone other than Kosmek,
or without our approval and confirmation, it will void warranty.
⑥ Other caused by natural disasters or calamities not attributable to our company.
⑦ Parts or replacement expenses due to parts consumption and deterioration.
(Such as rubber, plastic, seal material and some electric components.)
Damages excluding from direct result of a product defect shall be
excluded from the warranty.
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Notes on Handling
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Warranty
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Maintenance・Inspection
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