I would like to ask if the speed of the hydraulic cylinder is related to the load on the piston rod?Proportional flow valve how to type, I currently only know the maximum pressure 2.5Mpa, according to Q=VA count as 0.4L/min, 1L/min can be chosen according to the ratio of flow valve? Is there another way to choose?
In the normal working pressure range, the speed of the hydraulic cylinder is independent of the load. The speed decreases only when the load is abnormal or near the variable pump setting pressure, forcing the system pressure up to the system overflow valve, overflow, or variable pump variables.
Speed and load independent, mainly related to the flow, piston rod diameter, proportional flow valve type selection, according to flow and pressure selection, specific samples can be checked
How to choose the proportion of flow valve, mainly based on the flow to control the size and accuracy, pressure levels, as well as some of the owners of the special requirements of the brand.As you say 0.4L/min this small flow proportional flow valve, can choose the brand is not much, Rexroth 2FRE6 series should be able to meet your requirements. As you said, the choice of 1L/min proportional flow valve is very appropriate, in the recommended electric signal 25%~75%.
