The PC200 - 8 option valve is designed to work with the hydraulic fluid used in the PC200 - 8's hydraulic system. It is compatible with various types of hydraulic oils, including mineral - based oils, synthetic oils, and some biodegradable oils. The recommended viscosity range of the hydraulic fluid for the valve can be from [V] cSt to [W] cSt (centistokes) at the normal operating temperature. The valve's seals and internal components are selected to ensure compatibility with the fluid's chemical and physical properties over a wide range of temperatures.