When the variable delivery pump operates at a given speed, the flow rate of hydraulic fluid leaving the pump can be adjusted. By reducing the flow rate leaving the pump, the pressure in the system will increase since the same amount of hydraulic fluid is being pressurized in a smaller amount of time. Conversely, increasing the flow rate leaving the pump will lower the system pressure as the hydraulic fluid is pressurized over a larger volume.

Control valves (directional valves) can be used to direct the flow of hydraulic fluid to the hydraulic motors, and by adjusting these valves, operators can control the pressure and flow to achieve the desired deck machinery operation.

• They offer excellent efficiency, ensuring that a high percentage of the hydraulic energy is converted into mechanical power.
• These motors provide high torque at low speeds, making them suitable for applications where heavy loads need to be lifted or moved slowly.
• They can effectively handle variable flow rates, which is essential for providing variable speed and torque control for deck machinery operations.
• The speed and torque of the motor can be precisely controlled by varying the flow rate from the variable delivery pump.
• Hydraulic radial piston motors are known for their durability and ability to withstand the demanding conditions typically encountered in marine applications, making them a suitable choice for deck machinery on ships.