Motorised valves - open when power off
I need some 28 mm motorised valves that are open when there is no
power rather than closed as is more usual.
I don't suppose I can get them from eBay, but need to do a Google
search. Trouble is, I'm not sure what they're proper name is to
search on. Can anyone help, or give me any links to sites where I
could get them?
TIA
Keith
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