[Richard]

I assumed, and you know what assume means, that the purpose of the valve was to slow down the bedroom slide. The front slide is actuated by two cylinders, of slightly large diameter than the one cylinder of the bedroom slide. The rate that a cylinder moves in a hydraulic system is controlled by the volume of flow unless the max pressure of the pump is exceeded. The valve restricts the rate of flow. If the same volume comes out of the pump, then the bedroom slide would move over twice as fast as the salon slide. That would be too fast.