🔍 Key Concepts

• Trace the control line between V5 (water drain valve), the nearby transducer(s) (PT/WT/VT), and the controller/programmable unit shown at the top of the diagram. • Compare a mechanically actuated valve (opened directly by pressure or centrifugal force on the valve itself) versus a remotely actuated valve (opened by air or hydraulic signal coming from a controller). • Look at the MARST1/EPC program unit legends, especially alarms mentioning water content, transducer signal, or drain valve to understand what parameter the system is watching.

💭 Think About

• From the drawing, does V5 appear to be opened by a local force acting right on the valve body, or by a signal coming from the control/program unit via lines and actuators? • Which measured quantity in the system (oil pressure, water content in oil, centrifugal water force, or a pre‑programmed shutdown sequence) is actually connected in the diagram to the device that operates V5? • If the system is designed to maintain clean oil automatically, what would be the most logical thing for the transducer to detect so that it can decide to open a water drain?

✅ Before You Answer

• Verify whether there is any direct mechanical connection (like a spring and water pressure under the valve) drawn for V5, or if it instead shows instrument/air lines coming from the controller. • Confirm what the labeled WT/VT/PT transducer is sensing (pressure vs. water content) based on its location in the oil outlet/effluent line. • Check the MARST1 alarm legend for entries related to abnormal water content or drain valve insufficient, and think about which choice best matches that kind of automatic control.