Looking for valve solenoids that have to work with a nominal voltage of 28 VDC, and in emergency cases they also have to work in the range of 20 - 33 VDC. Another important specification is the nominal oil temperature (95 ºC) and the nominal ambient temperature (100ºC). I have two questions:
1.- Do they exist? (I am having problems to find them)
2.- In case the exist, does anyone knows any supplier?
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Try looking at the Industrial Control Valves. I quickly looked through the book and couldn't find any that use a nominal voltage of 28 DC. There are a few that use 12 and 24 however.

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