How to choose a cylinder
It’s necessary to have some essential information to choose the correct cylinder, this information includes: force, stroke and type of cylinders in relation to their use.
And also some further information as: required oil volume and operational speed
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 assisted return, in which the piston is retracted by means of an internal compression or a 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, (double acting): the piston is retracted hydraulically by pumping oil into the anular chamber of the cylinder. The ideal usage of these cylinders is in production applications where a fast cycle time is required.
When being used in a lifting application, the lowering of the load can be controlled by adding 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 the retracting the piston is required. The cylinders of the COF, COG, COI, COL, COS ranges belong to this group. When it is necessary to exert a pulling force, we recommend cylinders belonging to the COD, COJ ranges. These cylinders are supplied with the required threads and connections and may also be operated at the maximum working pressure on both sides of the piston.