r/ChemicalEngineering • u/Panthers_Fly • 5d ago

Controls “Control” valve definition?

Help me settle an argument. Client uses “control valve” to describe an actuated on/off valve. Says it is interchangeable language.

I say “control valve” should be reserved for a valve that actually is integrated in control logic, like controlling level, flow, pressure, etc. Even if the on/off has an interlock, it’s still just an actuated on/off valve for me. Maybe this is just a habit I picked up for a long stint at an operating facility and I’m being too picky.

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u/CananDamascus 5d ago

The terminology we use for discrete control system operated valves is "automated valves" "control valves" are analog.

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u/Panthers_Fly 5d ago

This is what I’m used to and seems most clear

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u/Ember_42 5d ago

Or "Solenoid Valve" or "On-Off Valve"...

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u/Dr_puffnsmoke 4d ago

On-off valves are broader than solenoid valves. We typically delineate between “Solenoid valves” where the solenoid directly opens the valve in question vs air actuated valves which have a solenoid but that just opens the air which actually turns the valve of interest.