Under what condition are oil buffers required in hydraulic systems?

Oil buffers in hydraulic systems are required primarily based on the operating speeds within the system. When the speed exceeds a specific threshold, typically above 200 feet per minute (FPM), the potential for cavitation and viscous heating increases. This can lead to decreased efficiency and possible damage within the hydraulic system.

At higher speeds, the hydraulic fluid's ability to absorb energy and dissipate heat becomes critical. An oil buffer acts as a stabilizing element, helping to maintain consistent performance by managing pressure changes and absorbing shock loads within the system. This is especially important in applications that require precise motion control and reliability.

The condition that mandates the use of oil buffers ensures that the hydraulic system can function safely and efficiently at higher operational speeds. Therefore, stating that oil buffers are required above 200 FPM correctly reflects the need for enhanced fluid stability and system protection in those conditions, as standard measures may not suffice to prevent issues associated with higher speeds.