I’m translating a series of documents related to a company that manufactures poultry vaccines. One of the documents is a ventilation and conditioning schematic, and I’m working on the labels this morning. One symbol only has abbreviations attached to it so I’m completely mystified as to what it might be.
The component itself looks somewhat like this:
—Ø–<|>—
although the ‘null set’ symbol is smaller, and the second symbol is a larger square with a slash through it diagonally, sitting on the connection at its corners so that the inner slash is perpendicular to the connection. The labels (abbreviated, as I said) are also accompanied by a percentage figure, all of which are 99.99X%. I’m guessing it’s some sort of filter?
The second symbol sounds like a compressed air shutter mechanism, seen these on hydraulics drawings.
Is the “null set” an exchanger maybe?
Possable supply air register and return air register. There should be a table with the blue prints.
Table’s absent. This is third-hand documentation, BTW; client sent it to the outsourcer, outsourcer sent it to me. I don’t have the original plans, just a JPG in a Word document. There’s a set of each on either side of the areas they flow through, so it might be supply and return registers. They’re connected to centrifugal fans at either end, pretty much in this order:
fan - nullset - square - area - nullset - square - noise dampener - fan
If they are in fact air registers, what does the percentage figure indicate?