I know these are more or less the same thing (or at least look so from the outside) but perform slightly different functions and are slightly different on the inside (or are they?) Is it that one is vacuum and the other is air,or are they both the same in this respect?
Also does their at-rest position always allow an air path from say the input to output 1 but not output 2,and then when energised from the input to just output 2 and not output 1? So basically they're just on/off or open/closed air change over valves?
I need a quick and cheap air change over valve in the next day or so and if an N18 or N75 will work,I can easily get one at my local scrappie tomorrow.
Also does their at-rest position always allow an air path from say the input to output 1 but not output 2,and then when energised from the input to just output 2 and not output 1? So basically they're just on/off or open/closed air change over valves?
I need a quick and cheap air change over valve in the next day or so and if an N18 or N75 will work,I can easily get one at my local scrappie tomorrow.