1. If the check valve is installed on the pump, it can prevent the sudden increase of pressure from damaging the oil pump and play a check function.
2. If the check valve is connected in parallel with the throttle valve, the actuator will form a forward slow speed, reverse fast, or forward deceleration, reverse circulation circuit.
3. If the check valve is connected in series with the pressure valve, the adjustment pressure can be increased to prevent the pressure from reacting.
4. If it is a hydraulic control check valve, use the oil control to open the check valve to achieve the purpose of reverse oil flow.