I have been designing a hydraulic hole punch circuit looking at what was previously done I came across this symbol I have never seen before and have mixed feelings on what it is doing. I have been looking to potentially eliminate the extra component to make the hole punch design simpler. Is it feasible to eliminate the symbol pictured in figure 1 and not loose any functionality of the hole punch? Also what is this symbol doing?
Here is what I think it may be
- A counter balance on "A"
Opposition: The hole punch weighs roughly 1 kg where as the cylinder is much larger so why would a counter balance be needed? Do all gravity affected movements need a counterbalance?
Specs for the cylinder
23.8 GPM EXTEND (90.4 L/M)
25.0 GPM RETRACT (73.8 L/M)
STROKE VELOCITY 11.9 FT/MIN (3.6 M/MIN)
7.00" BORE (152.4MM) 10.62" STROKE (273.05MM)
3.00" ROD (76.2 MM)
- Metered flow component with a check valve
- Pressure Relief Valve