Its like gas when its hot it expands and when its cold is "gets smaller" so in my case when it gets cold and the fluid shrinks it opens more room and drops in pressure slowly until the temperature stays constant. With our system once we drop 10% of the set pressure we get a failure alarm. My...
Im having an issue with a manual pump opening an actuator. It opens fine and holds pressure until the temperature starts to drop. My question is does anyone know of any hydraulic oil that is not susceptible to condensing when temperature drops?