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solenoid valves



Hi all,

Does anyone know how solenoid valves work, that it, the ones driven by AC
electricity? A signal that fundamentally has no polarity (the AC voltage)
is somehow being turned into motion/force in a particular direction (the
motion of the valve piston). Do they just rectify the AC with a diode, or
what?

--
--James McLean
jmclean@chem.ucsd.edu
post doc
UCSD