On 2019-09-21, Bob La Londe wrote:
I've got a couple 4 way solenoid valves made by STC (imported by STC)
that don't seem to work. 12VDC Model 4V310-1/4. They are NIB, but I
bought them quite a long time ago for the project I am currently working
on. I don't even recall who I bought them from, but they were not super
cheap nor excessively expensive. Around $40 if I recall.
I've used plenty of simple on-off solenoid valves in the past. They
just work. You hit them with the rated voltage and adequate current and
they reverse condition. Open/closed
When I hit these STC valves with 12VDC from a 12V battery (plenty of
current from a battery) they click and a red light turns on, but the
shuttle that changes the port connections of the valve doesn't move.
I'm looking at the installation instructions from STC right now on their
website, and I don't see anything that doesn't make sense. Is there a
setting or setup I am missing or do these valves just not work?
https://www.stc9.com/STC-DOWNLOAD/SOP-4V100-400.pdf
Well ... based on those instructions, the DC coils may be
sensitive to polarity. Obviously, AC coils cannot be so. :-)
It looks (from the photos) as though the 4-way has white and
black leads from the coil. The 3-way has red and black.
But it seems the Red and Black are for DC only coils, and the
White and Black is AC only. So it may be that there is a permanent
magnet in the DC valve, so polarity determines which way it tries to
move when connected. Black to minus and red to plus on the battery.
If both wires are the same color there is no polarity
sensitivity. So what colors are your wires?
Yeah I dropped an email off to STC, but I am sure I won't hear back from
them before Monday at the earliest.
I hope that this is some help -- but it is already Monday, so
unless they are slower, you should have already heard from them.
Good Luck,
DoN.
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