I wonder if it could stand the pressure of being on all day, every day. Or would you do all your steaming at one time? I know that steamers are big dollars. I am not sure I would want to work next to a hissing espresso maker all day. There are tools we improvise and tools we don't. Remember a steam cleaner is amoung the most dangerous equipment in your shop.
I have a funny story about my steam cleaner.
My shop isn’t in the best neighborhood and I was working late
(1:00AM) one night. I had my steam cleaner on and, without
warning, the emergency release valve opened. After I came down off
the ceiling, I unplugged the steamer. I haven’t had any more
problems with it but it still scared the H E double toothpicks out
The use of an espresso (spelling?) maker is interesting. Coffee
shops leave them on all day long without problems. I know they may
be using professional models, but I don’t think the pressure is as
high as jewelry steamers. Imagine steaming your drink with one of
those, there wouldn’t be anything left in the cup.