How to choose a cylinder
Some essential information is necessary to choose the correct
cylinder. This information includes:
- FORCE
- STROKE
- CLOSED HEIGHT
And some supplementary data such as:
- REQUIRED OIL VOLUME
- OPERETIONAL SPEED
Load return
Load return , in which the piston is retracted by the weight
of the load (or any other external force). The minimum force
required to retract the piston is approximately 0,2% of the
rated cylinder nominal push value. These cylinders are the
most economic solution for an application that does not
require quick removal of the cylinder after the
load has been lowered.
The cylinders of the CGG, CGR, CGS ranges
belong to this group.
Spring return
Spring assisted return , in which the piston is retracted by means
of an internal compression or tension spring inside the cylinder .
These cylinders are proposed whenever it is necessary to remove
the cylinder quickly once the load has been lowered.
The cylinders of the CMC, CMF, CMI, CML, CMP,
CMT ranges belong to this group.
Oil return
Oil Return, (double acting): the piston is retracted hydraulically
by pumping oil into the anular chamber of the cylinder.
These cylinders are ideal for use in production applications
where a fast cycle time is required.
When being used in a lifting application, lowering of the load
can be controlled by fitting a pilot check valve and one-way
flow distributor into the circuit.
The return pressure can be set at a lower value when it is only
needed to retract the piston. The cylinders of
the COF, COI, COS ranges belong to this group.
When it is necessary also to exert a pulling
force, we recommend cylinders belonging
to the COD ranges . These cylinders are supplied complete
with the required threads and connections and may also be
operated at the maximum working pressure on both sides of
the piston.
Example: cylinder
C | # | # | # # # | # | # # # | # |
Cylinder | Return type | SerieS | Pushing force in tons | N = Standard P = Plunging (with no end of stroke nut) |
Stroke in mm | F = with base mounting holes T = with mobile integral saddle |
CMF20N100
Cylinder, spring return with 20 t. force, N version, 100 mm stroke.
CGG200N250FT
Load return cylinder with safety nut, 200 t. force, N version, 250 mm stroke with fixing holes in the base and integral saddle.