Hydraulic System Of Mobile Scissor Lift
Motor driven hydraulic pump absorbs oil from oil tank, pushes hydraulic cylinder rod with that pressure at the same time, afterwards lift platform will uplift vertically under the action of cylinder rod.
When lift platform is descending, pressure oil reflows to oil tank from magnetic valve under the control of governor valve and flow valve.
When lift platform is overloaded, overflow valve opens automatically and pressure oil will reflow to oil tank through overflow valve while lift platform does not ascend. Hydraulic cylinder does not have descent governor valve, ensuring always normal descent velocity in the circumstance of oil pipe rupturing. See hydraulic principle diagram as hydraulic operating principle.