What is the role of the poppet valve in a hydraulic system?

The poppet valve in a hydraulic system specifically functions to control the flow and pressure of the hydraulic fluid, playing a crucial role in relieving pressure when needed. It acts as a fail-safe mechanism; when the pressure exceeds a predetermined limit, the poppet valve opens to allow fluid to escape, thus protecting components within the system from damage due to excessive pressure.

The poppet valve ensures that fluid can flow in a controlled manner while preventing situations that could lead to system failures or hazards. This relief mechanism is vital for maintaining the integrity and safety of hydraulic systems.

The other roles mentioned in the alternatives do not accurately describe the function of the poppet valve. Hydraulic pressure is typically generated by pumps, while monitoring fluid levels and cooling hydraulic fluid involve different components such as fluid level sensors and heat exchangers, respectively.