The hydraulic pressure should be used for the control valves and components
Upstairs two are the general elements that make up the hydraulic system. You don't describe it in detail. I don't know what kind of "slow" is needed. Hydraulic systems have multiple speed control circuits, each requiring a specific valve to achieve its purpose. Here is a brief introduction to several circuits (the components of the system are not repeated). One, the throttle speed adjustment includes the inlet, outlet, the by-pass throttling speed regulation all need the throttle valve. The variable pump is needed for the variable pump speed circuit (the volume control circuit). The speed conversion circuit requires the throttle valve and the stroke valve or two speed control valves in series and 1 2 valve or 2 speed regulating valve in parallel and 1 2 bit 3 pass valve.
Commonly used conventional hydraulic system components, such as: motor, hydraulic pump, filter, relief valve, pipe fitting, fuel tanks, hydraulic cylinder, double lock, three or four or three five directional control valve, if speed electric hydraulic proportional control valve, adjustable throttle valve, the other in the system with accumulator can accelerate oil cylinder movement speed.
To achieve these two functions (lift and fast), the hydraulic system must have a reverse valve (lift and lift) and adjustable throttling valve (fast and slow).
The hydraulic cylinder, three four-way solenoid valve, one-way valve, hydraulic pump and filter are required
