[artdutra04]

Originally Posted by hans4

Okay so those solenoids are back ordered for four weeks would these replacements work?

SY3240-3G:
http://www.pneuaire.com/sy3240-3g.html
SY3240-3GZ:
http://www.pneuaire.com/sy3240-3gz.html

or perhaps

SY3240-3L:
http://www.pneuaire.com/sy3240-3l.html
SY3240-3LOZ:
http://www.pneuaire.com/sy3240-3loz.html

These will NOT work on an FRC robot. These are rated for 110VAC operation.

12v solenoids from SMC have 6 in the first character of the second group of their part number, for example VQZ2221-6LO-N7T.

Originally Posted by hans4

Also what is the true difference between a single and double solenoid? I cant seem to find that information anywhere.

Single acting solenoids have their output directly controlled by the input; thus, when the power is turned off or disabled, the output returns to the "off" output no matter what. Double acting solenoids only change their output when the input signals are toggled; thus they can maintain either output with a loss of signal.